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If its going 80% before playing up it sounds like maybe your drivers or motors are over heating. are the motor hot to touch when the print fails.
by
obewan
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Printing
As DC said, it could be the driver, It sounds like an intermittent fault on the X DIR signal, this could also be faulty port on the mega.
You could try mapping the X driver to use the E2 pins as a test.
by
obewan
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Repetier
Are you homing the axis before trying to issue a G1 move ?
by
obewan
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RAMPS Electronics
If your X endstop is on he right hand side of the extruder, then that is set as a X max enstop, you will need to tell firmware to home to X max.
If the Y endstop is at the front of the bed then that is a Y max endstop , so tell firmware to home to Y max.
This should make X0 Y0 at the front left corner of the bed
If you click the right arrow in octoprint but the X moves the wronng direction, jus
by
obewan
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Printing
Yes its normall, USB 5volt will supply power to the arduino/ramps untill you supply 12olts from a power supply.
by
obewan
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RAMPS Electronics
In your photo you have the Y+ Y- the wrong way around and show the Y endstop in the Y max position.
When the bed moves towards the back, this is Y-
Your problem with the Z motors sounds like the normal problem, 'default homing speed' set too high in marlin firmware.
by
obewan
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Prusa i3 and variants
It sounds like you have your printer home position (X0 Y0) located at the back right of the bed, this is normally the X max Y max location.
It shouldn't effect the prints ,just as you said, it prints them backwards.
Where are your X and Y endstops located ?
by
obewan
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Printing
If your endstops are showing triggered while not being pressed then you need to invert their logic function
In configuration.h
#define X_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Y_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
#define Z_MIN_ENDSTOP_INVERTING false // set to true to invert the logic of the endstop.
by
obewan
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RAMPS Electronics
Blue wire is not the signal wire.
If you have connected the brown wire to 12 volt, you may have damaged the endstop port on the mega.
Your probe is showing as a NPN NO type so the best way to connect it is as follows
NPN probe
Any diode should be ok, i use a 1N4148 type
by
obewan
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Firmware - Marlin
If your Y axis is reversed then you should be able to just plug the motor connector the other way around to change its direction. make sure you turn the printer power OFF first tho.
by
obewan
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Firmware - Marlin
From the ubl/mesh bl source
You should be able to use G29 S
* S Store Store the current Mesh in the Activated area of the EEPROM. It will also store the
* current state of the Unified Bed Leveling system in the EEPROM.
*
* S # Store Store the current Mesh at the specified location in EEPROM. Activate this location
* for s
by
obewan
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Firmware - Marlin
I think you will find they are a slide fit onto the 8mm leadscrews and just apply a lateral guide to the top of the leadscrew,
by
obewan
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Reprappers
size 0.75 x 0.75 x 0.25 is very small, did you import using the correct units (mm/inch)
can you post link to the part stl.
by
obewan
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Slic3r
I would recommend keeping Z safe homing enabled to avoid any possibility of the printer trying to Home Z with your bltouch outside the bed.
by
obewan
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Reprappers
Also in slic3r there is a 'infil/perimeter overlap' setting in print settings/advanced tab. you try different values to compensate backlash etc.
by
obewan
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Slic3r
The RPK devices are just 4 resistors in a convenient 8 pin package of the value stated (100, 104, or 182) (10 ohm, 100k ohm, 1.8k ohm)
From your description and tests, it seems like you have burned 1 or more tracks on the board.
by
obewan
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RAMPS Electronics
A lot of them are defaults, you need to obviously check things like steps/mm, enstop active high or low, homing direction.
Heated bed is 'off' by default
If you have a Z probe, new options appear when you turn on probe support.
If you decide on repetier firmware, i advise using the DEV version as i posted,
by
obewan
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RAMPS Electronics
The ramps board will run 2 Z stepper motors ok.
Up to you when you upload firmware, either before or after final assembly.
You can get the latest marlin firmware here
or
repetier firmware here
both work well, personally i prefer repetier.
by
obewan
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RAMPS Electronics
Quoteerniehatt
looks like I spoke to soon, it was printing great got about 2/3 of the way through on a fairly large print, then shifted towards the front about 5 mm.
Got me beat, I wonder if there could be a cliche in the motor,or even the ramps I wouldn't have thought so, but who knows.
Carries on like this for much longer I will have to go back to belt drive, shame as quality is good.
You mean
by
obewan
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Prusa i3 and variants
Quoteerniehatt
Hi Guys, sorry for jumping in on another's thread, but it is appropriate for my problem.
I have just changed over my Y axis from belt drive to lead thread, and am having problems.
I entered the 400 as did Bee69, but I am getting no movement, I can hear the motor trying to turn but no movement,
I also changed the motor from nema17 to 14, maybe this is the problem, I don't know.
I ch
by
obewan
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Prusa i3 and variants
QuoteDuteycs
I have entered G29 into the start code. It doesn't perform a grid probe it lowers the z axis until the probe triggers then starts printing.
What firmware is this for ?
by
obewan
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Prusa i3 and variants
If you want it to do a auto level befoer it starts the print, you will need to enter a G29 command in the slicer start g-code (or edit the g-code and insert a G29 )
by
obewan
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Prusa i3 and variants
2mm switching distance is very limited especially with a aluminium bed, this distance will be reduced, (2mm is with a ferrous material).
If you have the bed heater enabled while probing, the current going thru the heater can also interfere with the probe.
by
obewan
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Prusa i3 and variants
Cant see the video, but maybe the 'avoid crossing perimeter' option.
by
obewan
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Slic3r
The heater GND is not actually ground, it is switched via the mosfet.
Same with the part cooling fan via a different mosfet.
Cant see any reason why you cant use one +24v wire tho.
by
obewan
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RAMPS Electronics
A lot of the leadscrews i see on ebay state they are 2mm pitch, but dont say how many leads they have, most are 4 lead,meaning 4 seperate threads,so a 2mm pitch is actually 8mm.
1/16th microstepping at 8mm will = 400 steps/mm
by
obewan
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Prusa i3 and variants
Could you not print a priming line at the start of the print in the slicers start g-code
by
obewan
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Slic3r
