Ramps + Makelangelo, motor problem

[Jean-Baptiste]

Hello everyone,

So I am trying to build a Makelangelo since a few days and I have some big problems with the motor.

Here is my setup :
Arduino Mega2560 (two board)
Ramps 1.4 (two board too)
TMC2100 (Also tried DRV8825 and A4988 with the same problem)
12V 5A power supply (only got one this time 🙂 )
two 42hs4013a4 motor (tried with JK42HS34 too)
No endstops (yet)

I tested everything with the RAMPS test code, motor turns without a skip, absolutely no noise (TMC2100 drivers are the best) and no problem.

But once I flash the Makelangelo firmware, and try it the motor starts acting weirdly, skipping steps, making way too much noise and even changing rotation while moving.

Setup is :
Microsteps : 16 (no jumper for the tmc2100 and three jumpers for A4988)
Steps : 200 * microsteps (1.8° motor)
Step delay : 50 (tried 25 too)
MOTHERBOARD : BOARD_RAMPS
Current limit : 1A

Did anyone encounter the same problem ?

Thank you

[Dan]

We don’t officially support RAMPS. Some users asked us to add the pin configurations.

I would check your pulley size, machine dimensions in software. If they’re doing something like divide by zero it could get wierd. If your pen is at the home position and you travel up 300 you’ll see the motors reverse direction because they get confused – the pen can’t actually travel there and in the math the sign of one number flips to to negative, which reverses the motor direction.

[Author]

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