@Forum-user It's basically backwards. It would be far more effective to have the high static pressure output blowing across the drivers.

@max22 do you have enough spare stepper motor driver outputs on the Duet+DueX to drive each of the 3 Z motors from a different driver?

@juanggrados the PCB trace between VIN+ and the bed fuse is lifted. You can solder a piece of thick copper wire between them in its place.

@dc42 @droftarts thank you again! I'll get back to experimenting and will post an update on my progress.

Good morning,
Thanks for the response, I'll be patient.

Thanks.

@dc42 Thanks for the reply. I thought that that was probably the case

@droftarts

I think mainly that N-channel MOSFETs are better for fast switching, so are more suitable for PWM applications such as the heaters and fans.

I use P-channel MOSFETs a lot, but the fact remains that they dissipate much more heat - up to a magnitude more than the N-types -, so cooling becomes a major problem.

Instead of a common ground, you can have a common +V

Yeah, that's what, on the continent, British cars were famous of - or feared … 😊

@dc42 Thanks, connecting the int pin fixed it.

For anyone else reading this thread in the future, you need 5 wires from a LIS3DH to a SAMMY C21.

GND - GND
V33 - V+
PA22 - SDA
PA23 - SCL
PA13 - INT

@jay_s_uk okay, thanks thats easy to make.

@droftarts said in z-probe ADC voltage:

I'd be interested in seeing the amplifier circuit; it would be good to have load cell support in RRF too.

As info:
I was working on a amplifier for my FSR's in the last days. If you are interesed, here's my quick and dirty scheme of the circuit.
The amplifier is built with a double op amp OPA2340 and is able to adjust the offset and gain separately.

47fd92c8-1119-4e71-b9fb-d7e2c556c387-IMG_20241011_084216.jpg

It is not yet perfect, but it works good in my "test environment". I will add at least a low pass filter somewhere in the signal line to filter out possible stepper EMF's. But i have to thinking about where and how...

EDIT: the 100 ohm resistor and the LED is not needed, it shows only if the circuit is powered...

Good afternoon, can you tell me if you managed to solve this problem? Did you end up using the limit switches on additional axes or did you change the board / firmware / find another way?

@willv see this post earlier in this thread https://forum.duet3d.com/post/166688

@droftarts Hello Ian,

everything works as expected. Thank you for your suggestion.

Oskar

@asglödsfgldsklögsjklö probably want to start with board you're using (or boards if running CAN-FD), firmware version and a copy of your config files

@droftarts yes, I though the problem is completly different of this post.

Please send an email to warranty@duet3d.com and CC your reseller. Include a link to this forum thread and the details of your original purchase. You'll receive a reply with a form to fill out.

Yes its a 6HC, i won't be back at the shop until tomorrow morning when i will follow this advice and respond with results.

Mike

@droftarts Thank you, it worked 🙂

@droftarts

Thanks for the information Ian, will try to hook it up and see what it does.

Commercial = NO I'm 74years old fart playing around with some toys.