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    Topics created by DrDFlo

    • DrDFloundefined

      Maximum jerk and acceleration values?

      Using Duet Controllers
      • • • DrDFlo
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      Phaedruxundefined

      @drdflo said in Maximum jerk and acceleration values?:

      @Phaedrux - See the below picture. If you hover over maximum allowed speed change a tip box appears with an allowed range: 0.1 - 20mm/s

      @oliof This question is actually in regard to an earlier forum post, where I am controlling mirror galvanometers with the step pulses output by the expansion header of a duet wifi. I had to simplify the original post by getting right to my question here. The maximum speed of a galvanometer is given in volts per second, which of course corresponds to the angle of the mirror. I am unable to find a maximum acceleration value for galvanometers. For the purpose of this question I converted the rate at which the angle is changing to surface speed of the laser rastering. That 150V/s corresponds to 1650mm/s. In my reply I accidentally confused myself by saying acceleration when I meant velocity. If I set my acceleration to 1650 mm/s then the system won't be able to go over that 150V/s limit - at least that is my thought.

      dfe75a00-1363-4743-8413-0321866201e5-image.png

      So what you're seeing there for the jerk range is a reflection of the max speed for that axis which is 20mm/s.

    • DrDFloundefined

      Configuring Jerk and Acceleration for Laser Rastering (SLS)

      Using Duet Controllers
      • • • DrDFlo
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      DrDFloundefined

      @o_lampe Thank you for your response!

      Your problem with ringing (and other design constraints) is why I went with mirror galvanometers. They can change direction almost instantaneously, so constant laser power should not be as much of a concern if I can use high jerk values.

    • DrDFloundefined

      Solved G30 - Retracting after Z probe triggers

      Tuning and tweaking
      • • • DrDFlo
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      DrDFloundefined

      [Solved]

      Thank you for your response! All sorted out.