Topics created by theBohnanza

@dc42
Thank you, that's the Info I needed.

Hi,
@deckingman ah, i see. Didn't see the comment in the gcode file.

@wilriker Tried it, sadly still no difference
By now i have commented each line of gcode out once to find the source of error, no further improvement since.

I have to overwrite the steps, since i have to remap Z between Drive 5 and 6 with each toolchange, wich works flawlessly btw.
Stupidly additionally to the more complicated settings in duet i have chosen to try 2 differently geared steppers for the two z axis, which is why i have to set Z Steps/mm.

I have added a M92 command at the end of homeall.g to see, if it would change something- it didn't.

@dc42 do you have an idea?

Thanks guys!
Alex

HTD belts aren't really designed for positional accuracy, they are designed for high-torque, usually uni-directional loads, like a car fan belt. From the SDP/SI "Handbook of Timing Belts, Pulleys, Chains and Sprockets" page T-5: "The HTD design requires substantial belt tooth to pulley groove clearance (backlash) to perform". And backlash is even worse on smaller pulleys. The backlash is needed to get the belt tooth into the pulley groove; without it, the tooth will 'twang' into, and out of, the pulley, causing a vibration in the belt. The design of GT2 pulleys and belts improves this, and would be a better choice for reduced backlash.

See this discussion for more HTD details: https://www.thingiverse.com/thing:16627/comments/#comment-2473684

Ian