@Bad-Joker for the SZP board it probably makes very little difference which side you cool it from. I suggest you cool it from the back and put thermal insulation over the front.

@droftarts Thx 🙂

@ortondale
Hi Thanks for the help, up a running ok.
Looks like a new bed plate called for!

@pro3d
Another possibility could be to power the pump with the bedheater out, if it is free.
I power my waterpump with the bedheater to be able to completely shut off the pump with a "M42" command. With PWM=0, the pump will not fully turn off...
But i run a 12V system. Not sure if you can wire the buck converter to the bedheater.... i think it should be possible...

@droftarts No, they're not... Which is something I'm going to do very soon.

Thank you for your feedback, I will contact support 😉

If the error seems to follow the driver and now the motor/cable then it would seem the connectors are alright and the fault is in the driver.

All fixed!
I cannot explain when or how, but config.g was gone. It took my [digital] son all of five minutes to find [that] to be the whole problem. Backups took care of it.
I just wish I had video of exactly how I caused it.
I must slow down and be much more careful. Now I can continue with my spindle.

@marco_meier Those drives can use a 24v signal, however they will also accept 5v Step/Dir signals on the proper pins, so you can simply run 6XD 5v to CN1 pins 3 and 5, and Step- and Dir- to CN1 pins 4 and 6, respectively.

All you really need to concern yourself with voltage-wise is the 24v enable signal, which the Duet team has confirmed the 6XD CANNOT sink on the EN- pin. The enable circuit on my breakout board would do what you need, and you could easily coble something like that together without making the whole board. Really, any simple relay/electronic-switch style setup that allows you to trigger a 24v connection with the 5v-tolerant EN- pin from the 6XD will accomplish what you need.

@droftarts Thank you very much Ian for your elaborate answer. That solved it!
I've chosen the easy route and used I_O4 and I_O7 and they are working perfectly now.

@droftarts Thank you for the reply, that answers my question!

@RockB the answer is available in this thread:

https://forum.duet3d.com/topic/36183/duet-3-motor-23-cl-torque-curve?_=1725438247537

@jay_s_uk That worked perfectly, thank you very much!

@dc42 @jay_s_uk
Thank you both for the help!
I will try with the 48mm 2.3A version.

@droftarts Thank Ian, this gives me enough to find a solution! Since the wiring (of 2 dual switching hotends) is still under construction, it might take a while till testing. I'll report results. Maybe there are more lunatics to try printing with 4 hotends like this .....

@Notepad a small amount of metal several mm above the coil won't matter as long as its position is fixed native to the coil. The BLTouch is mostly plastic anyway.

@droftarts Thx for reply ! actually i active manualy ( with motion studio on PC ) and the motor move but on my printer i dont have a Pc to activate manually ENA haha

i go try with a relay on 24 v to try if its a wiring problem or just a setting

@OskarP in fact the 800mA total current limit only applies to outputs for which the jumper is set to 12V. More current is available when the jumpers are set to VIN as you are doing.

@RoyMackay Can you check what version of RepRapFirmware you are using? Please send M115 and post the response.

; Disable all heaters
M140 H-1 : Disable the bed heater
M307 H1 A-1 C-1 D-1 ; Disable Heater 2 (Hotend)
M307 H1 A-1 C-1 D-1 ; Disable Heater 2 (Chamber)

Assuming you're using RRF 3.x, the above commands are not necessary. No heaters are defined by default, so there's nothing to disable.

; Lasers
M563 P0 S"Laser"
M452 C"duex.pwm5" R255 F5000
M42 P"duex.pwm5" S1

This isn't quite right. The M563 and M452 are fine, but the M42 won't do anything, other than report an error. You can check for errors in your config.g by sending M98 P"config.g". If you want to test the duex.pwm5 (or whichever one you are using), delete the M42 from your config.g, and comment out (with a ; at the beginning of the line) the M452, then reboot.

In the console, enter the following:

M950 P0 C"duex.pwm5" ; assign GPIO port 0 to heater3 on expansion connector, servo mode M42 P0 S1

This should turn on the Duex PWM5 output to 5V. Measure between the E6_PWM pin and GND.

Ian

@fotomas I think the UART connection is just for tuning, and can be disconnected once this is done. For actually triggering, the output is via the endstop connector, so can be connected to a toolboard.

It's interesting, for sure. It uses a digital amplifier, rather than an analog amplifier that other piezo implementations use. The standalone version is for other places you would normally use a piezo; behind the extruder mount, under the bed etc. You don't want to squash them too much!

Ian

@dc42 we just changed the extension board and voilà, the system is running!! Thanks a lot for your help and the hint with the 3.3 V rail, problem solved!

Best regards,
AMLen