Installing the 4 Start Z Lead Screw Upgrade on Your Printrbot Play

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3 Comments

  • 0
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    Pdboudreau

    Details about the lead screw, such as size (M8, M6, etc) and pitch (1.25mm, 1.5mm, ect), help determine the exact layer height in mm to minimize z axis banding. It takes time to realize you can't simply use .1 or .3 mm layer heights.

    Only these sizes seem usable without z axis banding:

       .8 .12 .16 .2 .24 .28 .32 .34

    Providing the full dimension of the lead screw, not just its length, in the product documentation would be more useful. The video's are great, but details complete the experience.

    Edited by Pdboudreau
  • 0
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    Ncarter512

    I just got my upgrade. the coupler does not seem to fit on the z axis motor shaft.

    Anyone else have this issue?

  • 0
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    __Vinz__

    Could sb confirm the information from Pdboudreau ? This looks pretty important to me.

    I am unsure as to why .1 is no more usable (I get your explanation though, although pictures would help) given that the New Simple Pro uses that rod (and makes use of the .1 layer height IIRC). Could it be something tied to the Play geometry?

    Note that with the quarter inch rod, I was told to use 0.2064 as a layer height, not 0.2 (and thus 0.1032, not 0.1).

    Also, Brook says the machine is much faster with the new rod but I have not seen that in practice. With Prontrface, the Z movement speeds looks identical to me than before. Do I need other changes, for instance maximum feedrates?

    Below are my EEPROM settings after the M92 update:

    > M501
    < echo:Stored settings retrieved
    < echo:Steps per unit:
    < echo:  M92 X80.00 Y80.00 Z400.00 E96.00
    < echo:Maximum feedrates (mm/s):
    < echo:  M203 X125.00 Y125.00 Z5.00 E14.00
    < echo:Maximum Acceleration (mm/s2):
    < echo:  M201 X2000 Y2000 Z30 E10000
    < echo:Acceleration: S=acceleration, T=retract acceleration
    < echo:  M204 S3000.00 T3000.00
    < echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s),  Z=maximum Z jerk (mm/s),  E=maximum E jerk (mm/s)
    < echo:  M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
    < echo:Home offset (mm):
    < echo:  M206 X0.00 Y0.00 Z0.00
    < echo:PID settings:
    < echo:   M301 P22.20 I1.08 D114.00
    < echo:Min position (mm):
    < echo:  M210 X0.00 Y0.00 Z0.00
    < echo:Max position (mm):
    < echo:  M211 X100.00 Y203.00 Z131.00
    < echo:Bed probe offset (mm):
    < echo:  M212 X5.00 Y0.00 Z-0.60

     

    Edited by __Vinz__
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