Topics created by charliedrums

@charliedrums You want a 4-way, 0.5mm pitch, opposite side contacts, Flat Flexible cable, eg from Mouser.
Duet3D supply 50mm and 150mm long cables that are rated for 80C.
Different lengths, and higher temperature rated FFCs are available.

(Copied from https://docs.duet3d.com/en/User_manual/Troubleshooting/Parts#connectors-used-on-duet-3-roto-toolboard, I'll add a section for the SZP.)

Ian

@droftarts Thanks for the reply. I'll switch it to a 31x31 then.

@charliedrums it's most likely an issue with the CAN/power cable to the SZP. Check the crimp connections, and if the SZP is mounted on the hot end, use a cable tie to anchor the cable to the hot end. Having a moving cable going directly into a connector is a recipe for getting bad connections.

Does the LED on the SZP momentarily cease to flash in sync with the main board when the warning appears?

@charliedrums I'm glad you solved it! Thanks for the update.

@gloomyandy said in Scanning Z probe G31: invalid Z probe index:

@charliedrums said in Scanning Z probe G31: invalid Z probe index:

uet SZP firmware version 3.5.0-rc.1+ (2023-11-20 12:50:20)

Your SZP does not seem to be running 3.5.0-rc.3. Probably best to make sure all of the boards are using the same version.

Totally brain farted, this was the issue. I was trying to update the SZP board trough putty with sudo apt update but it kept saying everything was updated. Fetched the rc3 update bin file for the SZP from the github directory and uploaded it trough DWC and installed it from there. That seemed to be my problem. I don't get the G31: invalid Z probe index at start up anymore. Thanks everyone for the help.

@chrishamm I'm kinda lost here. I have the Pi connected separately to power with an official pi 4 power supply. Still connected separately it does not create the resurrect.g

@charliedrums

Figured it's worth mentioning!

Ethernet cable might be ok if it's the shielded type, though most isn't. It works on the principal that each pair is running to a differential amplifier, that both wires in the pair pick up the same noise and the amplifiers have high enough common mode rejection to push the noise well under the signal level, rather than actually shielding the conductors from noise itself. Audio cable is always shielded so that would work, though most is only 2 conductor + shield.

It's worth noting that you should ground the shield to somewhere off the signal path and only do so at the control board end. Don't use the shield as a ground wire or attach directly to signal ground. 4 pair shielded is fairly easy to get hold of by the meter here (eBay, Amazon or many maker/electronics stores) - I doubt you'll struggle too much to find locally wherever you are.

Really interested to see how you get on!