I just upgraded my printer from a Bigtreetech Tango board to this Manta M8P board. I brought my config file over and edited the required pins. Now, when I hit home, The printer will begin to home. But somewhere in the process, it will stop. Sometimes before getting to the x endstop sometime on the way to the Z endstop. No pattern seems to exist. When it stops, all lights on the control board, save for the 5v power led, go off. turning the power off, waiting for a few seconds and turning it back on will fix this. It happens every time I try to home the printer.
What could be going on here?
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One thing, that i think may be contributing to this is the fact that when I make a firmware.bin file, it does boot from it or change it ot firmware.cur.
7 motors plugged in. I have a motor on each corner. All wheel drive setup. Two Z motors are plugged into 3a and 3B on the board. They are parallel
The rest of the motors have their own driver. This config and setup worked with my previous board. The motors work. It will home normally sometimes. It even went to home Z once but crashed before it got there.
I’d recommend you update your host and make new firmware. Good place to start but unlikely to solve your issues.
My guess that is you have 1 or 2 motors with the direction reversed. The need for (!) on the direction pin can be reversed by motor wiring. I’ve no experience with “4 wheel drive”.
I will update and try again. One motor reversed makes a lot of noise as they fight each other. When it does move, it moves silently and smoothly. I had to reverse one motor because of this when I switched boards.
Nah. No joy. I tried a different SD card, used Kiuah to remove Klipper and reinstall. I updated the system through Kiuah too. Everything’s up to date now. Same results.
I think your host is crashing. There was 1 event in your log where logging just stopped, no error, no traceback, nothing. Any error with the MCU or USB connection should get logged.
I found the problem. Overnight while I was thinking about it, I went over everything I did that might have caused it. The only thing I changed from the old board to the new one was add an LED to light up when StepperX activates. I have this working on a different printer so I just copied that part of the config and changed the pin as necessary. It worked fine.
The homing process would start. X would home, then the light came on and Y would start to home and about 4-6 seconds later it would shut down. When I unplugged the LED, the problem went away. I have the LED hanging in the air becasue I wasn’t finnished assembling it. Im guessing, as the LED got warmer, it was consuming more and more 5v current till it overwhelmed the system and shut things down.
It was aa bother to diagnose because it didn’t happen right away, but some seconds after the light came on.
Very True. But as I say, I have this exact same LED setup on my other printer wired the same way. Maybe, because I have 3 on my big delta wired in parallel and heat sink paste glued to the Aluminum printer frame, they aren’t giving issues like this one is.
I’m still curious as to how you wired the LED; I’m guessing your “big delta” has a different main controller board/stepper drivers which survives this better.
Regardless, just attaching an LED onto whatever output you’ve put it on is not a good idea.
The Delta has the exact same board and stepper drivers from BigTreeTech. Manta M8P. Yes, I agree with you, LEDs should have resistors. I got these out of a silly dolarama light switch. It had 2AA batteries and two 5cm Bright LED strips. There was no resistor in sight when I opened it up so I figured all good the resistor is built into the chip. I used them on my delta printer and they were fine. For me this confirmed tha these don’t need resistors. Right now, I have that LED with a 21 Ohm reistor. I started with 430 and stepped down to the lowest I could find. It is not as bright as it should be I think. but it is reasonable and the printer stays on with the LED on.