Reprap Forum - Stepper Motors, Servo Motors, DC Motors Discuss here what makes your printer moving. https://reprap.org/forum/list.php?160 Tue, 19 May 2026 12:39:33 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?160,897027,897027#msg-897027 Vellemann K8400 drv8825 Probleme (6 replies) https://reprap.org/forum/read.php?160,897027,897027#msg-897027
Als Neuling in dieser Gemeinschaft möchte ich Sie herzlich aus dem Allgäu grüßen.

Ich habe ein Anliegen bezüglich meines Druckers. Leider ist der Schrittmotortreiber defekt. Obwohl ich bereits einen neuen bestellt habe, gelingt es mir nicht, den Motor in Betrieb zu nehmen.

Muss man vielleicht eine Firmware aufspielen oder sonstige Einstellungen vorzunehmen?

Ich wäre Ihnen für Ihre Unterstützung sehr dankbar.
Ich hoffe, ich habe mein Thema in die richtige Kategorie eingeordnet.

Mit freundlichen Grüßen
Zafer Aydin]]> Dream61 Stepper Motors, Servo Motors, DC Motors Fri, 01 Aug 2025 05:52:40 -0400 https://reprap.org/forum/read.php?160,896351,896351#msg-896351 Y motor ticks after stopping (2 replies) https://reprap.org/forum/read.php?160,896351,896351#msg-896351 I think I am missing something simple here, I hope someone can help.

I have put together a Bear Prusa clone, kinda. Anyway, I printed some parts and assembled it mostly like a Bear. It is using Ramps 1.4 and Drv8825 drivers.

My issue is that the Y motor has some clunkiness sometimes, then the printer errors and has to reset. If I home the printer, sometimes it stops fine, then starts ticking about every second for a minute or two before needing to reset.

I have run it without the y belt and get the same symptoms.

I have swapped driver boards, both Drv8825 and the A4988. I have swapped stepper motors. I have swapped the ramps board. I have not swapped the Mega board. I have isolated the wire to the stepper so no cross talk.
I have adjusted the voltage. Changed the step settings from no microstep to 1/32. Set steps per mm to various things to account for weird missed steps.

It is only on the y. The heat sink gets hot and the motor whines.

I don't know what I am missing.
Thanks Scot]]> Progr3ss Stepper Motors, Servo Motors, DC Motors Wed, 08 Jan 2025 16:14:43 -0500 https://reprap.org/forum/read.php?160,894854,894854#msg-894854 TMC2209 (1 reply) https://reprap.org/forum/read.php?160,894854,894854#msg-894854
Is there any benefit using a TMC2209 for extruders stepper motors.
Please be specific.

Thank You]]> Roberts_Clif Stepper Motors, Servo Motors, DC Motors Mon, 20 May 2024 17:17:16 -0400 https://reprap.org/forum/read.php?160,893118,893118#msg-893118 How do I calculate the theoretical max speed of a motor? (no replies) https://reprap.org/forum/read.php?160,893118,893118#msg-893118
- RepRap calculator
- Alex Kenis provides a spreadsheet (see also links therein)
- Many thanks to Ryan Carlyle for his answer to "Real life stepper speed" here on 3D Printing.SE
- Zalophus Dokdo's Stepper Motors Calculator
- CNC.xyz's Stepper Motor Calculations

However, some of them simply don't explain all the math behind the numbers, there are differences see issue #38 between real-life measurements and theoretical predictions, and all the notation is a bit inconsistent.

It is possible to do the calculations using full ODEs and all that sort of jazz, but it's too much for a single motor. I prefer to see it as a black box with some exposed parameters, nothing more.

What I've got so far boils down to EMF:

A = 1.8o, angle per full step
U = 24 V, voltage
P = 2 mm, pitch
Nt = 20, teeth per gear
Nms = 16, microsteps per full step
v = 200 mm/s, desired speed
Th = 0.4 Nm, holding torque
Ir = 1.5 A, rated current
R = 5.75 Ohm, phase resistance
e = 75%, stepper current
L = 8.4 mH, motor inductance
f = 200 kHz, max step rate, see Klipper docs

Derived variables:

Ns = 360o / A = 200 step/rev, full steps per revolution
d = P * Nt = 40 mm/rev, distance per revolution
ds = d / Ns = 0.2 mm, distance per full step
dms = 1000 * ds / Nms = 12.5 um, distance per microstep
Ie = Ir * e / 100 = 1.125 A, effective max current
RD = Ns * Nms / d = 80 step/mm, rotational distance (is it supposed to be microsteps/mm?)
vmax = f * 1000 / RD = 2500 mm/s, max theoretical speed at this rate
RPMm = 60 * (v / d) = 300 rev/min, revolutions per minute at speed v; Alex also multiplies by Ns and divides by a magic number 200, both really make no sense to me
RPSm = RPMm / 60 = 5 rev/sec, revolutions per second
xir = 1.414 * PI * Th * (RPSm / Ir) ~ 5.9 V, rotation EMF. This is the point where questions start to arise though. I found another source ("Back emf due to rotation of stepper motor") where the rated current is used as well. To me, it looks like should be Ie even for peak EMF values since the current is limited by the corresponding driver. There is also an argument in issue #38 regarding the coefficients that should be used in practice

xii = RPSm * PI * Ie * (L / 1000) * (Ns / 2) ~ 14.8 V, Alex uses magic numbers again, I also failed to find the actual source for this formula.

Now, since I'm not sure these values/formulas are valid I can't move to the next part that's calculations of the maximum achievable speed. Even more so, there are two formulas that introduce even more confusion.

I'd be happy to see some solid advice or potential sources to read.]]> BoilThemMashThem Stepper Motors, Servo Motors, DC Motors Sun, 16 Jul 2023 10:25:32 -0400 https://reprap.org/forum/read.php?160,891921,891921#msg-891921 TMC2130 not working in standalone mode (no replies) https://reprap.org/forum/read.php?160,891921,891921#msg-891921 My problem is that A4988 drivers work fine on my Robin Nano 1.2 Board but 2130 standalone drivers don't.
Any idea what the problem is.
(Yes jumpers adjusted, firmware 2130 standalone mode selected..)]]> ahmetcemturan Stepper Motors, Servo Motors, DC Motors Mon, 06 Feb 2023 06:59:23 -0500 https://reprap.org/forum/read.php?160,891263,891263#msg-891263 Klipper config Manta 8P servo steppers 3DP1000 printer (no replies) https://reprap.org/forum/read.php?160,891263,891263#msg-891263
[reprap.org]

but it works only once then loops

Here is original firmware:

[github.com]

If somone has cfg file for Manta 8P with step/dir pins and LCD on exp1/2 let me know.
I also need to convert steps/mm to rotation distance.]]> jzagaja Stepper Motors, Servo Motors, DC Motors Tue, 06 Dec 2022 04:21:04 -0500 https://reprap.org/forum/read.php?160,891118,891118#msg-891118 NEMA 34 for DM556T driver (no replies) https://reprap.org/forum/read.php?160,891118,891118#msg-891118 I have DM556T drivers (https://www.oyostepper.com/goods-112-Digital-Stepper-Driver-18-56A-20-50VDC-for-Nema-23-24-34-Stepper-Motor.html)
and I'd like to get NEMA 34 series motors for them. I have these two in mind and I'm not sure if I could get the stronger one considering the drivers.
https://www.oyostepper.com/goods-401-Nema-34-Stepper-Motor-70Nm-1001ozin-w-Brake-Friction-Torque-40Nm-566ozin-.html
https://www.oyostepper.com/goods-510-E-Series-Nema-34-Stepper-Motor-Bipolar-18deg-120-Nm-169968ozin-60A-86x86x1515mm-4-Wires.html
Or do you think that even the weaker one is on the edge and I should go even lower?
Controlled from PC via LPT port. It will be powered by a 36VDC switching power supply. Designed to drive the axes of a CNC router with a floor plan of 0.7 x 1.2 m (2x Y axis, 1x X axis, 1x Z axis), ball screws with a pitch of 5 mm. Wood "alloys" will be machined ]]> ludongzhan5 Stepper Motors, Servo Motors, DC Motors Wed, 23 Nov 2022 03:43:15 -0500 https://reprap.org/forum/read.php?160,889153,889153#msg-889153 Stepper driver selection (1 reply) https://reprap.org/forum/read.php?160,889153,889153#msg-889153
I once again have a question which requires your vast knowledge. For a project that I am currently working on I am using 2 Nema 23 stepper motors which run at 24V, 2Amp peak current per phase. I am currently looking to use a stepper driver to control these to implement movement along with the code I have written. However when looking on google for a suitable driver I am unable to find anything other than TB6600's stepper drivers. Now initially there is nothing wrong with them. However it turns out that they aren't actually using TB6600 drivers but infact use TB67S109AFTG.

Therefor I would like to ask if one of you has any experience driving a bit stronger steppermotors and could recommend me stepper drivers which I could use.

The stepper data that it will drive is the following:
- 2Amp/phase
- 24V
- max 1/32 microstepping (will probably use 1/8 or 1/16)
- RPM, no RPM has been set so far but I will definitely not go above 250 RPM.

Hopefully this data will be enough information to give me some recommandations

Thank you in advance.]]> CptBlueberry Stepper Motors, Servo Motors, DC Motors Fri, 06 May 2022 11:06:39 -0400 https://reprap.org/forum/read.php?160,888531,888531#msg-888531 Lerdge X and stepper (no replies) https://reprap.org/forum/read.php?160,888531,888531#msg-888531 mga Stepper Motors, Servo Motors, DC Motors Wed, 02 Mar 2022 08:49:22 -0500 https://reprap.org/forum/read.php?160,887886,887886#msg-887886 Current for steppers of Anet A8 Plus (2 replies) https://reprap.org/forum/read.php?160,887886,887886#msg-887886 my Robin Nano v3 just arrived, MKS TMC2209 v2.0 drivers includet. But I don't know what current my stepper motors need.
The ons for the x-axis is labeled 'STEP MOTOR 42SHDC3025-24B' and I found different information about this driver on the internet. Some websites say it requires 0.9A, another website figures out 1.5A are needed. So how can I figure out what the right current is?]]> cysign Stepper Motors, Servo Motors, DC Motors Sun, 16 Jan 2022 16:53:24 -0500 https://reprap.org/forum/read.php?160,885317,885317#msg-885317 Steppers move only manual (3 replies) https://reprap.org/forum/read.php?160,885317,885317#msg-885317
I am building my first 3d printer for hobby purpose.
I am currently still in the testing phase.

As setup I have the following:
- power supply 12v 30 amp
- Arduino mega
- Ramps 1.4
- Stepsticks DRV8825
- Nema 17 engines
- marlin 2.0 firmware
- Pro interface (software)
- slic3r (software)

I have connected everything as can be found on various websites.
Because there is no heated bed and extruder connected yet, I have provided this with a dummy value in the firmare.

Both establishing a connection with the board and controlling the motors via the user interface of pronterface works properly.
Loading a file (g-code) also goes without problems.
However, when I give the print command the problem starts.
the motors are briefly actuated and then stop.
On the Ramps 1.4 board, the red led keeps flashing which would indicate that commands are still coming in.
You can also hear that the motors are being controlled.
These also have the intention to start spinning but still remain stationary.

What have I tried myself:
- check all connections and reconnect.
- acceleration speed of the motors reduced
- Boudrate set to 115200.

I hope someone recognizes the problem or has a solution.
Thank you very much for your time!]]> Schenkhuize Stepper Motors, Servo Motors, DC Motors Wed, 11 Aug 2021 13:45:31 -0400 https://reprap.org/forum/read.php?160,885019,885019#msg-885019 nema17 moves only one step (1 reply) https://reprap.org/forum/read.php?160,885019,885019#msg-885019 (I heated it above cold extrusion limit)
After that it rotates freely.

There is same problem in two printers but 3rd printer works fine with same marlin setup.
stepper driver is ok, wiring is ok, motor is ok...
I also tested E1 slot (instead E0) with same result.

setup: MKS GEN L 2.1 // marlin 1.1.9.1 // A4988 (16 microstep)]]> Hexentric Stepper Motors, Servo Motors, DC Motors Sun, 18 Jul 2021 21:50:04 -0400 https://reprap.org/forum/read.php?160,884440,884440#msg-884440 Electronic boards (no replies) https://reprap.org/forum/read.php?160,884440,884440#msg-884440 The shell of compounds is larger than expected. There's only limited space in the factory, but it needs more space to solidify the shell. It takes 24 hours to solidify the compounds.

Summarized the matters mentioning above as follows:

1. The size is larger after potting compound
2. Solidify time 24 hours
3. Not suitable for mass production

Is there any better way to prevent the problems?

thank you!!]]> VC Stepper Motors, Servo Motors, DC Motors Thu, 03 Jun 2021 05:14:21 -0400 https://reprap.org/forum/read.php?160,882907,882907#msg-882907 Servomotor disaster (5 replies) https://reprap.org/forum/read.php?160,882907,882907#msg-882907
I think that when the motor was physically forced to stop, the current spiked, probably causing the power supply to protect itself by shutting down, creating a back EMF voltage spike that was sufficient to destroy the controller and power supply.

Lesson to learn from this: don't share a power supply between a servomotor and an expensive controller board!

The new controller board is going to get its own power supply...]]> the_digital_dentist Stepper Motors, Servo Motors, DC Motors Mon, 09 May 2022 10:06:08 -0400 https://reprap.org/forum/read.php?160,882559,882559#msg-882559 SKR 1.4 turbo with M542 (2 replies) https://reprap.org/forum/read.php?160,882559,882559#msg-882559 spaceman Stepper Motors, Servo Motors, DC Motors Thu, 18 Mar 2021 07:58:38 -0400 https://reprap.org/forum/read.php?160,881815,881815#msg-881815 Mid band resonance> (no replies) https://reprap.org/forum/read.php?160,881815,881815#msg-881815 www.youtube.com] The motor in question is the NEMA11 model 11HS20-0674S just above and to the left of the print heads.

The problem is that the stepper stalls at full speed approximately halfway through its travel, when it has already accelerated to full speed; full speed being 520 motor RPM. Just driving the heads as shown in the video the movement is very quick, about 0.5 seconds to complete the swap, it is also very difficult to stop the movement of the stepper with one finger, even applying a lot of pressure. This all changes as soon as filament is fed through the short Bowden tubes when the stalling happens about 1 in 3 or 4 transitions - the only real change being the addition of a very small mass of filament.

Could this be mid-band resonance instability? The driver board is a pololu/stepstick type DRV8825 board, the current being set to 0.95A and is supplied from a 24V supply and quarter stepping is selected. Would a different board make a difference or a dynamic damper on the stepper motor?

Mike]]> leadinglights Stepper Motors, Servo Motors, DC Motors Mon, 22 Feb 2021 12:37:23 -0500 https://reprap.org/forum/read.php?160,879780,879780#msg-879780 Basics for me that has been playing with steppers and Trinamic (9 replies) https://reprap.org/forum/read.php?160,879780,879780#msg-879780
More than 7 years ago I did occupy myself intensely with stepper motors and with Trinamic modules. Using their stepRocker module and their IDE I was able to do many experiments to understand the implication that the Trinamic IDE made available to me controlling a stepper motor. I did use this combination of a stepper motor and the stepRocker module as part of my efforts to implement a winch to control the sail of my sailboat model. From the stuff that I learned then I am confronted with poor knowledge of stepper motors and with one of the consequences being to choose the wrong stepper motors. When myself trying to be polite addressing topics in this context I met aggressivity and comments that attacked me on a personal level. I hope this will be different here. And I want to explain why stepper motors today seem to be wrongly chosen and operated resulting in unnecessary step errors.

Let me go step by step:

The torque a stepper motor can deliver is dependant on the power with which it is fed. I know that this is only one parameter. I will come to others later.

To use numbers I want to use the standard power equation:

P[W] = I[A] * U[V]

Let's assume a printer is fed with the voltage and the current it is specified with. I call the nominal values.

P[W] = I[A] * U[V] = 1A * 12V = 12W

The critical factor in this example is the nominal value for the current, as this is related to the ability of the coils in the motor to how much current can flow through them.

Let us choose a different stepper motor with the same intake of power and in consequence the same torque:

P[W] = 4A * 3V = 12W

This is the better motor as its coils can be fed with 4A of current and achieve the same torque but with only 1/4 of the voltage means 3V!

Let us address the means by which Trinamic controllers control the feeding of a stepper motor. PW, Pulse with modulation. I am sure many of you know this. It is for those not familiar:



This graphic shows a PWM with 3 different settings for its duty cycle. Trinamic ICs control the current that flows through the coils of a stepper motor by changing the length of its duty cycle. So if you operate a stepper motor with its nominal values a duty cycle of 100% means the current flows continuously through the coils. But what does the Trinamic IC when you operate the second stepper motor, not with 3V, but with 12V? It sets the duty cycle to 25%. What is the result of this? The current that flows through the coils is still 4A:

P[W] = 4A * 12V = 48W

Thanks to the Trinamic IC, it limits the current to the 4A, its nominal value by using PWM at 25%. Now that second stepper motor has 4x the torque.

So whenever I choose a stepper motor for one of my naval modeling boats I choose the one that has the smallest nominal value for voltage as this way I have the maximum torque available. In my model sailboat, I feed my stepper motors used as winches for the control of the sails have a 3.6V nominal value fed by 12 LiFePO4 batteries. This battery pack when fully loaded delivers close to 40 V and when empty and they have to be recharged it is 24 V. So all SilentStepSticks based on Trinamic ICs offer this functionality.

So why it seems Creality i.e. uses nema17 in my Ender 5 Plus and specifies them to be 12V?

When I study YouTube Videos, i.e. the Kersley Fabrications channel I learn that one of the reasons to limit the printing speed is due to loss of steps. When I learn that the linear mode to accelerate and reduce speed is to be preferred over the S-Shape mode. If the NEMA 17 stepper motors used in my Ender 5 Plus are specified for 12V then the Trinamic IC is already using its PWM when the motor is fed with 24V. Of course, also the ability of the controller on the control card has to have the performance to do its computations. The higher the performance of the controller, the higher speed the printer can print while keeping the ability to do its control job.

It is topics related to this that made me choose the BIGTREETECH-SKR-PRO-V1.2 controller board. It has an ARM Cortex M4 controller that is already or powerful in its computation abilities and the higher operating frequency, 168MHz adds to it. The other reason I choose this board is that it supports SilentstepStick5160 and 5160hv. The TMC5160hv makes it possible for the SilentStepStick5160hv to feed the stepper motor with up to 50VDC, in the datasheet even 60VDC are mentioned. I have purchased a Meanwell 600W 48 VDC power supply and 6 SilentStepSticks5160hv from Watterott, the German company that partners with Trinamic, also a German company.

You might understand now why I was so surprised, not to be aggressive as Germans often are, that even the support of BIGTREETECH seems to be ignorant about this. I have already sent 3 emails to their support to ask if when applying 48VDC to their "Motor Power" connection these are isolated from other parts of the circuitry of my board. Still, just the response that the board can only be fed using either 12VDC or 24 VDC. Sure, and I am aware of this, the circuitry in this board can only be fed with one of these 2 possible voltage values.

Does anyone of you know if the Motor Power connectors are only passed to the VM of the sockets for the SilentStepSticks?
]]> Hellmut1956 Stepper Motors, Servo Motors, DC Motors Tue, 02 Feb 2021 08:06:55 -0500 https://reprap.org/forum/read.php?160,879222,879222#msg-879222 Stepper driver and motors still relevant? (2 replies) https://reprap.org/forum/read.php?160,879222,879222#msg-879222 KL23H2100-35-4B motors, a Gecko G540, and a 48V power suppy sitting here doing nothing. It's been a lot of years since I bought this so I assume much has changed since these were new. Any forseeable issues using this kit?]]> Ryan_M Stepper Motors, Servo Motors, DC Motors Thu, 03 Dec 2020 12:12:26 -0500 https://reprap.org/forum/read.php?160,878659,878659#msg-878659 LV8729 motor current setting (no replies) https://reprap.org/forum/read.php?160,878659,878659#msg-878659
Any thoughts?

Mike]]> leadinglights Stepper Motors, Servo Motors, DC Motors Mon, 09 Nov 2020 10:14:04 -0500 https://reprap.org/forum/read.php?160,876071,876071#msg-876071 How to calibrate bed leveling for fixed bed 3d printer (no replies) https://reprap.org/forum/read.php?160,876071,876071#msg-876071 I am using ceramic 3d printer a fixed bed. I have no idea how to bed leveling the gap between nozzle and printing surface i am using cartesian type 3d printer its custom 3d printer for ceramic printing this my printer [ibb.co] and also my 3d printer works good,motor, firmware everything works good only problem is bed leveling I don't know how to do it for fixed bed . I don't have any spring under my bed surface. I use wood board as printing surface.Any g code to add in my cura slicing software for bed leveling. You guys any idea how to bed leveling for my printer .Help me out guys]]> akilesh Stepper Motors, Servo Motors, DC Motors Thu, 13 Aug 2020 12:49:33 -0400 https://reprap.org/forum/read.php?160,876005,876005#msg-876005 DM542T Unusual Behaviour - Updated (no replies) https://reprap.org/forum/read.php?160,876005,876005#msg-876005 I have built my own 3d machine
Due to resonance at certain speeds i wanted to change from TB6600 drivers to DM542T drivers for the X/Y axes.
With the TB6600 drivers everything was working as expected (except for resonance at the specific speeds).
With the DM542T on the X axis (only have one DM542T driver at the moment), it works exactly as expected when the micro stepping is set to 800 (4).
When i say exactly as expected, i mean that the axis moves normally, and if i move, from the front panel, after homing, i can move it away from hp, back and forth, and when i return it to the hp, it will exactly (0.1mm) trigger the hp sensor. So home = hp sensor on, move 0.1mm = hp sensor off, whizz it around at various front panel dictated movements and return to hp which is activated when i move the last step of 0.1mm to 0 position.
But, when i change the micro stepping to 400 (2), it will work exactly as expected only if i do 1 click at a time, of the front panel encoder, to move it 1x 10mm, 1x 1mm, or 1 x 0.1mm. If i rotate the encoder so that it will move say 6 x 1mm in one movement, then it will miss steps. This problem happens both ways (ie "fast" click movements left and right). Again with single rotary clicks it is good.
I have tried reducing the speed it moves from the front panel, reducing the accerleration, have tried min and max motor currents on the DM542T - all without success.
I am thinking that because it works reliably at 800 (micro step 4) it cannot be anything except a weird DM542T problem ???
This problem also happens from Pronterface, if i do not wait for the move to be completed after each click of the gui.
The Marlin bugifx 2.0 settings are for a TB6600, but the spec sheet says that it is 2.5uS min pulse for the DM542T, and it is working at micro step 4 ???
What have i missed ?

UPDATE : When i said "miss steps" this was wrong, what actually happens is that with multiple rotary clicks (turn the knob quickly so that it does the all of the clicks as one single motion), it will move more than that requested !!
I have tested and measured :

for 10mm per click:
"fast" clicks to position 100mm moves the axis to 100 + 0.9mm
"fast" clicks to position 220mm moves the axis to 220 + 2.1mm

for 1mm per click:
"fast" clicks to position 15mm moves the axis to 15 + 1.4mm
"fast" clicks to position 17mm moves the axis to 17 + 1.6mm
"fast" clicks to position 25mm moves the axis to 25 + 2.4mm

for 0.1mm per click:
"fast" clicks to position 2mm moves the axis to 2 + 1.9mm
"fast" clicks to position 1.6mm moves the axis to 1.6 + 1.5mm

These measurement values are very repeatable every time.

There does seem to be a pattern with the excess movement amount - [(no. of clicks) - 1] x 0.1 mm.

Hence when i do a fast rotary click movement from the front panel it goes further than requested, and if i then return it to position 0, one click at a time, it will reach 0 without activating the hp sensor.

It will do the same from Pronterface, by clicking the gui button to move several times in quick succession (same as rotary encoder). Do one click at a time gives correct movement.

It appears that G code movements from Pronterface work ok.

This problem only happens with DM542T - TB6600 is ok.

It is not an axis problem, as identicle results are achieved on a separate axis.

I have tried 2 separate DM542T drivers both are the same.

DM542T set to 800 (microstep 4) works perfectly.

DM542T set to 400 (microstep 2) exhibits the problem.

So, i conclude it is a DM542T weird problem with microstep 2 (have not tested any other micro step settings on the DM542T other than 2 and 4), only with "fast" clicks of the front panel rotary encoder (or fast presses of the Printerface button), such that the axis goes to the selected position in one movement.

Does anyone with more intimate knowledge of Marlin bugfix 2.x have any ideas as to why this behaviour might happen - what is the difference between fast rotary clicks and single click motions - could it be a s/w bug ?? The extra movement is linked to how many "fast" clicks of the rotary encoder are done.

I would like to use microstep 2, but would also like the axis to operate in an expected way from the front panel and Pronterface.]]> Chips Stepper Motors, Servo Motors, DC Motors Tue, 11 Aug 2020 08:49:21 -0400 https://reprap.org/forum/read.php?160,875720,875720#msg-875720 tmc2208 jumper wires becoming loose? any tips for a more secure fit? (no replies) https://reprap.org/forum/read.php?160,875720,875720#msg-875720
So I wanted to replace my tmc2660 spi drivers with uart tmc2208 (also because the woman of the house does not appreciate stepper motor noises at night like I do for some reason.)

I went ahead and bought 5x bigtreetech tmc2208 and bought the wrong configuration (dir/step), so I had to solder the pads myself. I freed up a couple of pins for one wire rx/tx connection and installed the drivers.

When I was testing via the TMC debug function and no steppers connected, the drivers all came up fine after some wiggling on the jumper wires. Then I put everything back together and now I am getting an error for my X and Z axis.

I can only think of the jumper terminals being not tight enough and the connection having become flaky because of this. I already noticed this during testing, some of the terminals are so loose that it didn't feel like they got hold of the pin at all.

BTW: I am working with an azteeg x5 gt board, 24V PSU.

Does anyone have a better way to connect rx/tx for uart on these? I'd rather not solder the wires or use hotglue...]]> xnopasaranx Stepper Motors, Servo Motors, DC Motors Sat, 01 Aug 2020 10:18:33 -0400 https://reprap.org/forum/read.php?160,875458,875458#msg-875458 Nema 17 are not moving (15 replies) https://reprap.org/forum/read.php?160,875458,875458#msg-875458 Using ramps 1.4 and marlin firmware. My motor are not moving I don't know why can some help me]]> akilesh Stepper Motors, Servo Motors, DC Motors Wed, 29 Jul 2020 11:19:24 -0400 https://reprap.org/forum/read.php?160,874963,874963#msg-874963 No Motor Power With TMC2209 (5 replies) https://reprap.org/forum/read.php?160,874963,874963#msg-874963 I have just converted my home-brew printer from a Cartesian to corexy and made a couple of other mods too. I was originally running DRV8825 stepper drivers, which I've changed to BTT TMC2209 V1.2's (with UART) and with it, upgraded to Marlin 2.
Having completed re-assembly and Marlin config, I am pretty sure that my motors are not being supplied with power. After powering up I've completed a number of troubleshooting routes, which includes buzzing out motor wires to make sure they are all working correctly and the stepper drivers are connected to correct lines in the motor. I have also confirmed that each driver is receiving 12v and the VCCIO reads 5V and both the 12V and 5V board outputs are reading their associated voltages. Both the heated bed and hotend power up and achieve desired temps. I think this rules out a dead board. I have also tested a spare 2209, which also results in no power output. The drivers are read by the board, so an M122 command gives all relevant driver info. My final test has been to replace my E0 TMC2209 with an original DRV8825 (updating Marlin accordingly). This results in motor movement, which i think means there is connection between drivers and motors (not shorted something there).

Back to 2209s. I have been puzzling over this for a week now and I have no idea what the issue could be. This is my first stab at configuring using both Marlin 2 and TMC drivers so there is a chance I have missed something obvious but after comparing my build to several tutorials, I can't see what I have done wrong. Any help would be HUGELY appreciated!

Full build is as follows (wiring pictured, also):
Board: Makerbase MKS Gen V1.4 (MS1, MS2 & MS3 jumpers disconnected beneath stepper drivers)
PSU: 12V, 30A
Drivers: BigTreeTech TMC2209 V1.2
Motors: MT-1703HS168A
Endstops: Physical (to rule out a potentially oversensitive stallguard)
FW: Latest Marlin 2 (as of 05/07/2020)

Thanks in advance,
DK]]> Dangerklaus Stepper Motors, Servo Motors, DC Motors Tue, 14 Jul 2020 11:02:09 -0400 https://reprap.org/forum/read.php?160,874948,874948#msg-874948 Klipper: MCU which pins for step signal? (3 replies) https://reprap.org/forum/read.php?160,874948,874948#msg-874948
I have a question. I have a project planed which would require up to 12 stepper drivers.
As a firmware I would like to use Klipper. In the Klipper config file one remaps the pins of the mcu. So one could make use of unused pins on a controller board which normally doesn't support 12 steppers.
As far as I've understood, you only step_pin and en_pin to control a stepper driver. Here's my question, does the step_pin need to be a special pin (e.g. hardware PWM).
I tried looking at the mapping of a RADDS shield and the Arduino Due ports put didn't really find a common denominator.

Thanks for the help.
Daniel]]> schpongo Stepper Motors, Servo Motors, DC Motors Tue, 21 Jul 2020 23:03:24 -0400 https://reprap.org/forum/read.php?160,874197,874197#msg-874197 iHSV servomotor information (no replies) https://reprap.org/forum/read.php?160,874197,874197#msg-874197 I put everything I have found so far, and will add more as I find more, on my blog page here. If anyone has any links to tuning, etc., please let me know and I'll add it to the collection. I'm looking for material specific to the iHSV motors.]]> the_digital_dentist Stepper Motors, Servo Motors, DC Motors Wed, 24 Jun 2020 09:55:05 -0400 https://reprap.org/forum/read.php?160,873543,873543#msg-873543 P802MA stepper motor skipping, voltages? (4 replies) https://reprap.org/forum/read.php?160,873543,873543#msg-873543 For the most part its fine, but throughout the print it will skip steps at random during fast perimeters and such.

The stepper models 17hd40005-22b, and what I've had to do so far is pump up the driver voltage to increase the torque. I'm wondering if anyone has experience with what kinda of values I can use...

The factory voltage that was set is 0.826V on the driver, and I have it at 0.96V in order to get minimal skipping. Understandably, the motor now gets pretty hot, so I mounted a small fan/heatsink on it to keep it cool.

Am I ok running it like this? is there something else I'm missing that may be causing the problem??

other details:
Overture brand yellow PETG, extruder at 240C
Max speed is 60mm/s on the prints
Doesn't seem to be much back tension on the filament]]> SagiC Stepper Motors, Servo Motors, DC Motors Tue, 09 Jun 2020 17:28:32 -0400 https://reprap.org/forum/read.php?160,873057,873057#msg-873057 nema 17 stepper motor coils (no replies) https://reprap.org/forum/read.php?160,873057,873057#msg-873057 catmandu Stepper Motors, Servo Motors, DC Motors Tue, 26 May 2020 12:58:22 -0400 https://reprap.org/forum/read.php?160,873005,873005#msg-873005 Max step pulse frequency from ATmega2560 (no replies) https://reprap.org/forum/read.php?160,873005,873005#msg-873005 I have been looking around a lot to try to find out what the max frequency of pulses the ATMega2560 can produce to drive each of the step driver axes in a Marlin 2, ATMega2560, Ramps1.4, X,Y,Z,E type set up is.
I have seen a few discussions, with a few different figures given.
Is the stepper interrupt set to 10kHz - ie it can give 1 step pulse for each of the 4 axes at a max frequency of 10kHz ?
I have seen 100kHz mentioned, split between all of the axes ?
Now, i am not asking how to get my axis moving at whatever speed, so forget any step motor / driving limitations :)
If you were to have a 200 pulses per rev motor, attached to a 5mm per turn leadscrew, no micro stepping, then 10000 steps /sec would give a max travel rate of 250mm/sec.
In the config.h file for Marlin 2, the default feedrate is set to 300 for X & Y ???
So i guess that 10kHz is not the max frequency ?
I have also seen that it could output upto 4 pulses for each interrupt, but that these pulses would not be percisely synchronized - so i guess not much use for a 3D printer ?
So, can anyone tell me what the max frequency to operae all 4 axes synchronously is please ?
Thanks]]> Chips Stepper Motors, Servo Motors, DC Motors Mon, 25 May 2020 08:36:25 -0400 https://reprap.org/forum/read.php?160,872272,872272#msg-872272 Creality CR-10 S5 Z-Axis Motors Magnetically Seized (no replies) https://reprap.org/forum/read.php?160,872272,872272#msg-872272
I'm so close, and now yet so far, because I am now having problems with the motors not turning. I have adjusted the wiring positions in the plug several times, and the only real reaction I can get is when the wires are set to opposing coil forces (which causes the motors to vibrate). The "proper" positions produce something odd, the motors engage (with the normal "thunk" that you would hear with the motors activating), and then stop.

I'm able to turn them, with some force, but it's not a smooth motion, it's more like a socket wrench.

Normally, when working properly, they should be stuck solid in place when active, unable to be moved except by the system controls. (or released by selecting "Disable Steppers" in the menu)

I tested one of the motors last night with an LED, to see if the windings were good. They seem to be, so I've run out of options.

My Marlin version is 2.0.5.3.]]> T-SquaredProductions Stepper Motors, Servo Motors, DC Motors Sun, 10 May 2020 14:01:29 -0400