@kazolar M906 reports the configured current. The actual current may be lower than reported by M906 when the motors are not moving, either because of driver standstill current reduction, or because of RRF idle detection.

Did you ever run the test i described in this post https://forum.duet3d.com/post/355556 ? That checks for an unlikely error condition that the firmware doesn't check for.

You can re-execute the config.g after the board is powered up in order to configure it. Or have the 3HC config in a separate macro you can call after you've executed PSON.

@DuetUser is there a reason why you don't want to connect Duet VIN- to mains ground too?

@kumar22222 yes you can use mesh compensation with SCARA kinematics if you have a Z probe. Also, if you build your SCARA platform to stand on three adjustable feet, there is a facility to probe the bed (i.e. floor in your case) and then tell you how much to adjust each screw to get it level as possible, so that mesh compensation has less work to do. I have a SCARA printer that uses both of these facilities. See https://miscsolutions.wordpress.com/2017/09/24/improving-the-robotdigg-scara-printer/.

@Phaedrux No graph. The plan is disabled. Cold plate mold. And that's why I don't understand....

@davidjryan I realise this is a very late response; however the motor position will be available in the object model in release 3.6.0, which we expect to release within the next few days.

The position warning and error detection can be captured by an event handler macro. See https://docs.duet3d.com/en/User_manual/RepRapFirmware/Events.

@dc42 thats what i thought but i'm never quite sure of my own thoughts. So I will ground the PSU Negative to ac mains and use the octocoupler.

Thanks

@dc42 I use a 500ohm resistor so that I get 0-10V with the 0-20mA output from the pyrometer.

@DocTrucker yes it's the connector block will update when I next get a chance

@SDJ it's likely that the problem is loss of contact between the INT1 pad of the accelerometer chip and the PCB. If you have SMD hot air rework equipment and no-clean flux, you may be able to fix it.

@infiniteloop No, I didn’t touch the heatbreak as this is a Revo nozzle there is no PTFE tube inside just the nozzle tightened all the way in into the Roto extruder. The PTFE tube coming from the top barely gets inside the assembly without reaching the hobbed gears.

@elmoret it is a nozzle from the early beta testing of the revo system when those were shipped without sock, so, for your point, it is genuine. There is no air path blocked aside from the front where the toolboard is supposed to be installed and the back for the mounting system, did you mean that?

@o_lampe awesome, thanks. My pump is extremely quiet so that'll be nice.

@droftarts grazie del chiarimento. molto gentile

@dc42 Yeah, that's it.

Now I can put a big red STOP button on the front of my machine: in the case that kittens, puppies, or tenured professors get stuck in the high-speed moving parts, the button cuts the power to the motors and they stop nearly instantly. Kittens everywhere are safer... perfect answer, thanks again!

@FelixUCF which version 6HC board do you have?

The 5V_ext supply on the IO_ connectors of the 6HC is derived from the main 5V supply through a diode. Older 1HC boards that do not support 48V VIN also have a PTC fuse in that circuit. The 5V_ext voltage on the IO_ connectors will be missing if either the diode or the fuse is open circuit.