M command timing is off when executed from GCode file

dc42

@nkts if you are set up to compile RepRapFirmware then you could increase that value yourself.

I can look at increasing the maximum in the next 3.5beta release. Can you explain your use case for 8 spindles?

nkts

@dc42 I should be able to do it myself. I would be very thankful if you could give me a walkthrough on what I need to do.

I have 8 lasers that I need to turn on and off individually and each of them will have a different power output every time they are turned on. Therefore I need to define each as a spindle so I can control them with M3 and M5. Depending on the direction my toolhead is moving multiple lasers with different and also altering power output need to be on at the same time. To make it easier for me to control them I need every laser to be defined as a different spindle because this will happen very often and quickly during movement. If I had 8 spindles defined that would solve the first big issue I'm having.

The second one is that I only have 2 empty PWM connectors on my 6HC board. I also have a 3HC board, but I can't use these PWM pins. When doing:

M950 R1 C"1.out1"

I get:

Error: M950: Port must be on main board

Is there a way to make this work? Would it be possible to use a PWM pin on a Sammy C21 board?

nkts

@dc42 I managed to up the number of MaxSpindles successfully

To my second problem: I found the error "Port must be on main board" in the IoPorts.cpp file. However I don't quite understand how I can bypass this restriction. Is it even possible?
What I mean: is the firmware set up to allow spindles on expansion boards and you just blocked this feature? Or isn't this implemented in the code at all?
If it is possible to avoid this limitaion by changing some code, could you please tell me where I need to look or what I need to change?

dc42

@nkts the firmware is not set up to support spindles on expansion boards. To support them we would need to add new CAN messages to configure and control them. We haven't done that yet because until now we haven't been asked to support more than two spindles.

dc42

PS - I have created https://github.com/Duet3D/RepRapFirmware/issues/851.

dc42 created this issue in Duet3D/RepRapFirmware

open Support spindles and lasers on CAN-connected expansion boards #851

nkts

@dc42 thank you very much!!