Topics created by Italiano85

@Italiano85 if the distance multiplier is set to 1 and the backlash to 0.45, then a movement of 0.05mm in the opposite direction to a previous large move (so that 0.45mm of backlash needs to be taken up) should apply a correction of (0.45 * 0.05/(0.45 * 1)) mm in that move. If you command further 8 moves of 0.05mm then after those moves the backlash should be entirely taken up.

I appreciate that in a CNC application this isn't ideal, and that if no other motors are moving then it would be possible to take up all the backlash in one go, at the expense of the move taking longer than planned.

@Italiano85 thanks, in that case we need to replace your board. Please email warranty@duet3d.com and cc your supplier. Include a link to this thread in your email.

@Italiano85 I suspect that those ripples at the low end of the frequency spectrum are artefacts of the measurement process, because it seems unlikely to me that you really would have resonances at such low frequencies and at regular intervals.

What happens if you increase the acceleration, or change the data collection mode to "after the move completes"?

@Italiano85 said in Input Shaping + LIS3DH:

The strange thing is that the faster the printer goes, the better it prints... at an average of 250 mm/s the printer shows much fewer defects than at 80 mm/s

What sort of defects are they? Perhaps they are not related to resonances in your machine, in which case input shaping is unlikely to affect them.

@Italiano85 said in Problem with Duet3D 1HCL+Duet3D Magnetic encoder V0.3+MSR5000:

I have another question to ask, if I wanted to activate the brake of the 1HCL board so that when the motor moves it is deactivated and when the motor stops in a position of the Z axis an electromagnet along the carriage is activated, it is possible to do it using the config file?

The brake solenoid will be automatically activated (to release the brake) when you enable the motor either by using M17 or implicitly by commanding movement, and automatically deactivated (to engage the brake) when you use M18 or M84 to turn off the driver. There is no facility to engage the brake simply because the motor stops moving; but you should not need to do that because the motor should hold position, if in open loop mode you have a suitable standstill current fraction, and in closed loop mode you have a suitable I parameter in the M569 command I typically use 200).

BTW we have substantial improvements coming to the 1HCL firmware in 3.5beta4.

Please send an email to warranty@duet3d.com and CC your reseller. Include a link to this forum thread and the details of your original purchase. You'll receive a reply with a form to fill out.

(I think you've already done this.)