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    About

    Valide CSS!
  • There are some different drive systems:
    • spindle
    • belt
    • rack
    I like the spindle the most, because of stiffness & precision. Pitch is available from 1 to 25 [mm/rev].

    Difficult to know the right speeds etc, suppose the next specifications:

    • 1000 [Hz] speed: 25 [mm/sec] with resolution of: 0.1 [mm]
    • 10K [Hz] speed: 150 [mm/sec] with resolution of: 0.1 [mm]
    • 10K [Hz] speed: 25 [mm/sec] with resolution of: 0.01 [mm]
    • max speed spindel: 500 [rpm]
    • full step: 200 [Steps/Rev] (changeable by stepsize of driver)
    The table below gives some options of different pitchs:

    High pitch values give you the next benifits:
  • high speeds @ low step rates (100 [mm/sec] half step 25pitch @2000 [Hz])
  • accuracy could always optimized by micro stepping (when using fast step rates)

    Conclusion:
    Best choice is highest possible pitch rate. This because if you need large lengths (2 [m]) you don't want to wait for ages.
    (2 [m] will still take 20 [sec] with 100 [mm/sec] and then you need a second line to create and a third..)
    Pitch should be 20 or higher [mm/rev]:

  • 1K [Hz] frequency: 100 [mm/sec] (Full Step)
  • 10K [Hz] frequency: 166 [mm/sec] (Full Step)
  • accuracy: 0.1 [mm] (Full Step)
  • accuracy: 0.01 [mm] (Micro Step: 10)


  • 2 [m] spindles are available in different diameters: 16, 20, 25 [mm].
    • Weight [kg]:
      • D16 = 3.1
      • D20 = 4.9
      • D25 = 7.7
    • Critical bending speed [RPM]:
      • D16 = 1750
      • D20 = 2200
      • D25 = 2700
    • Critical torsion speed [RPM]:
      • L0.5[m] = 1800
      • L1.0[m] = 900
      • L1.5[m] = 600
      • L2.0[m] = 450
      • L2.5[m] = 360
    • Critical axial force [N] (I'll propably need less forces ;) ):
      • D16 = 1600
      • D20 = 4000
      • D25 = 9000
    Conclusion:
    • Chosen dimaters (max of 600 [rpm]):
      • X-axis: 25 [mm] length 2.0 [m] (or smaller)
      • Y-axis: 16 [mm] length 1.5 [m]
      • Z-axis: 16 [mm] length 0.5 [m]
    These values are for a general calculations methods when creating a drive shaft.


    The drive train system consist of differt items, see picture below:

    These items could all have their parameters, below an estimation is done for promosing parameters:

    Download calculater for speed, torque and inertia.