Microstepping advice

  • Hi, this I am sure has been asked but I can't find a clear explanation.

    I run a Cartesian with 0.9 deg motors on x and y and 1.8 on z and e

    What is the is ideal microstepping settings to start with?

    Should note that I mostly interested in fine detail on small objects. Rather than printing at speed, but saying that the best options for both would be good.

  • I haven't heard a cogent argument for not using the default 1/16th interpolated to 1/256th . Really good combination of quiet, accurate and fast if required. If the controller could handle true 1/256th at more than a very slow pace that might be better but I'm not too convinced you could see the difference in your prints.

  • I've been using 64 of late, but have been thinking I'll go back to the 1/16th with interpolation as well… probably for everything but my extruder. Extruded lines do seem smoother with 1/64th microstepping. (standard 200 steps/rev non-geared stepper)

  • I'm running 1/128th on my Cartesian now without delays in the stepper queue showing up at up to 150 mm/s. 1/64th is a good choice overall. 1/32nd gets kind of noisy. In the end run whatever you want, personally I want better then 1/16th resolution even if that only translates into 1/18th due to limitations in the mechanics/motors, etc. I don't at all believe those who say you can't get better than say 1/8th. I don't believe it at all. I can just , just barely tell the different going from 1/16th to 1/32nd. It's subtle but it exists in my case on my printer with my room temperatures and humidity etc..etc. I think you get the idea.

  • Great answers thanks, is there a difference between say 32 and 32 interpolation or 16 interpolation and 256?

  • dc42 has said the stepper specs say interpolation only works with 1/16th.

  • I haven't looked into tmc2660 but have skimmed the datasheet for tmc2100 and there are a lot of combinations. Maybe only a limited number of modes are coded into the firmware for spi comms with the drivers?

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