Currently using A4988 drivers. Worth updating to TMC2209?

[ednisley]

@Trek2120

how smoothly the contact of the belt to the teeth of the pulley is

Aaaahhh!

Here’s a nightmare scenario for you:

Laser skips 2mm to the left for each line engraved

I have done everything mentioned here and I am getting better results and then it gets worse. It is not right, finding that sweet spot with belt tension is almost impossible. This is not how it is meant to be. Talking to NEJE it appears that they have put the wrong pulley on the stepper motor for the belt they now use, only affects some machines. They have communicated with quickly and progressed the issue through to their technicians. So far so good. and will be sending me a new stepper motor…

So it’s possible the belts and pulleys don’t match, even though their labels say they should. Other than inspecting the pulley and belt teeth next to each other, I don’t know how you’d check for that.

FWIW, I got a just slightly out of spec leadscrew that drove me nuts for a while:

CNC-3018XL X-Axis Recalibration

So bad parts are definitely a thing.