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Re: Need for a Bowden extruder for a faithful servant. - 14 days ago

My Kossel XL has used the same Bondtech BMG extruder for around 4 years. I've never had a problem with it. The E3D Titan that it replaced used to jam.

by dc42 - General

Re: If statement for macro trigger in RRF - 21 days ago

I see that your similar question at has been answered.

by dc42 - Firmware - mainstream and related support

Re: setting current for no name stepper motor - 6 weeks ago

Take a look on stepperonline or another stepper motor catalog and look for motors with the same size (including length) as your motor. Pick the one with the closest resistance and use the rated current of that one as a guide to the maximum current you should use. If the resistance does not match exactly, the rated current varies approximately with the inverse square root of the resistance. Taking

by dc42 - General

Re: Firmware advice. - 7 weeks ago

As @Dust says; except that extruders with very low steps/mm (e.g. 100 or lower) can benefit from x32 or x64 microstepping.

by dc42 - Firmware - Marlin

Re: Identifying low-end controller for open-source clay printer - 2 months ago

@unfold I suggest you join the RepRapFirmware/TeamGloomy Discord channel. There you will find help with running RRF on a range of low costs controllers.

by dc42 - Controllers

Re: inverted polar 3d printer - 2 months ago

It looks to me that the kinematics is identical to a normal polar printer, in which case the standard builds of RepRapFirmware can drive it.

by dc42 - General

Re: RepRapDiscount Full Graphic Smart Controller dosen't work with long cables - 2 months ago

What controller does your Folger use? The display you have purchased requires 5V signal levels, so if the controller only provides 3.3V signal levels then the signal levels will be out of tolerance and very sensitive to ringing caused by longer cables. If your controller board does provide 5V signal levels (e.g. it is one of the older generation of controllers using Atmega chips) then you may be

by dc42 - General

Re: GRBL to Reprap converter - 3 months ago

Lighrburn and Duet/RepRapFirmware do work together. Configure Lightburn to generate G1 moves with the S parameter controlling laser power (this is also the configuration used by Smoothieware). If it's a laser engraver then in RRF 3.5 you can use up to 8 values in the S parameter of a single G1 command.

by dc42 - General

Re: Learning gCode? - 3 months ago

Conditional GCode is not a standard part of GCode. There are several different versions of it. Which version you have (if any) depends on what firmware you are running. For example: RepRapFirmware: LinuxCNC:

by dc42 - General

Re: Ground connection between 24v powered board and 12v supply - 3 months ago

Yes, connect the negative outputs of the two PSUs together. Laptop PSUs normally use a two core mains cable (no ground wire) so it won't create a ground loop. The ground loops to avoid are the ones created when you connect the printer to another device such as a PC through a cable that has a ground connection e.g. a USB cable, and both devices have a connection between their PSU output and mains

by dc42 - General

Re: Ground connection between 24v powered board and 12v supply - 3 months ago

You won't create a ground loop unless the grounds are already connected, for example if both PSUs have a connection between their negative output and mains ground. ATX and other PSUs intended for desktop PCa have such a connection built in but most other PSUs don't. You can use a multimeter to check for this.

by dc42 - General

Re: Ground connection between 24v powered board and 12v supply - 3 months ago

Yes you need to connect the grounds, however the SKR board almost certainly switches the negative side of its fan output. So connect the red fan wire to +12V from the 12V PSU and connect the black fan wire to the negative pin of the fan output of the control board.

by dc42 - General

Re: Weird Marlin issue with LCD - 4 months ago

Thr 5V regulator on an Arduino is inadequate to power an LCD. It overheats, causing it to reduce the output voltage. Your options include: - Connect a couple of silicon rectifier diodes in series with the 12V input to the Arduino to reduce the input voltage. This transfers some of the heat dissipation from the regulator to the diodes. - Instead of powering the display backlight from 5V, power it

by dc42 - General

Re: Updated to latest firmware cannot heat nozzle - 4 months ago

It sounds to me that you are still running an older firmware version. Send M115 to check the firmware version.

by dc42 - Reprappers

Re: Replacement connecting rods? - 4 months ago

Stainless steel can be either magnetic or non magnetic depending on the alloy used. I use magnetic ones from Haydn Huntley.

by dc42 - Fisher

Re: Unlevel print head - 5 months ago

I can't remember the construction of the Fisher, but could it be that a carriage that the rod tops are connected to isn't level?

by dc42 - Fisher

Re: PETG advice - 5 months ago

Even with a Duet 0.6 you should be able to control the speed of the fans unless they are stuck permanently on.

by dc42 - Fisher

Re: PETG advice - 5 months ago

PETG doesn't need a heated chamber. On my delta (not a Fisher) I use 80C bed temperature. I reduce the maximum speed of the print cooling fan to about 40%.

by dc42 - Fisher

Re: Mini differential IR height sensor board - 7 months ago

Yes, if you add an external resistor.

by dc42 - For Sale

Re: Mini differential IR height sensor board - 7 months ago

You can tell whether the sensor has started up in analog or digital mode by counting the number of LED flashes after power up. See the instructions at .

by dc42 - For Sale

Re: Mini differential IR height sensor board - 7 months ago

If the sensor doesn't detect a pullup resistor to +3.3V or +5V then it operates in pseudo-analog mode, outputting 4 different voltages depending on whether it is a long way from the bed, close to the bed but not quite triggered, close enough to be triggered, or overloaded with ambient light. If the board it is connected to treats the input as digital then it might see the "close to the bed but no

by dc42 - For Sale

Re: Help with Config Upgrade 1.21 -> 3.3 - 8 months ago

Hi @qunie, for faster response I suggest you start a thread at where the RepRapFirmware community and our support engineers will be please to help you. I took a quick look at your config files. For the BLTouch you used to have this M558 line: M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds You now have this one: M558 P1 C"zprobe.in" H5 F1

by dc42 - General

Re: How to set custom home position and drive directions - 8 months ago

Please post the whole config.g file, in particular we need to see the M574 commands that configure the endstops. You can test the endstops, either by enabling and opening the Object Model Browser in the Web interface and expanding the "sensors" key, or using the M119 command. For faster response to questions about RepRapFirmware post your question at .

by dc42 - Reprappers

Re: How to set custom home position and drive directions - 8 months ago

@oBezruki when you say RepRap do you mean you are running RepRapFirmware, or are you actually running Marlin? If you are running RepRapFirmware then please post your config.g and homing files.

by dc42 - Reprappers

Re: best post processing method to get smooth prints - 8 months ago

Likely out of your price range, but the E3D tool changer has an option called ASMBL which uses a small milling tool to do the finishing of the print.

by dc42 - General

Re: Thoughts on a piezo touch sensor - 8 months ago

Have you seen the Smart Effector? It uses a built-in strain gauge to detect nozzle contact.

by dc42 - Tech-Talk

Re: Help with Simple Triggers for Switches - 9 months ago

Hi Techman2930, please post on where our support staff and the RepRapFirmware community will be pleased to help you. It may help if you post a M122 diagnostic report taken after the fault has occurred and before you power down or otherwise reset the Duet.

by dc42 - Firmware - mainstream and related support

Re: Delta calibration point triggering (way) before reaching the bed - 9 months ago

I agree with your diagnosis. What sort of rod end joints are you using? Perhaps one of the joints between the effector and the Z tower rods is hitting its limit and stressing the effector and then the piezo module.

by dc42 - Delta Machines

Re: What to Build Next - 10 months ago

Vorons are also built with Duet electronics and RepRapFirmware. No need for a Raspberry Pi.

by dc42 - General

Re: Core ZXZY Build Log - 10 months ago

Looks interesting! As the kinematics is linear, RepRapFirmware supports it already, without even having to recompile.

by dc42 - Reprappers