Stepper motors & Z lead screws



  • Hi All,

    I have a question regarding the relationship of a stepper motors step angle and an attached Z lead screw. Some context: I'm working on upgrading to using 24v with a Duet Maestro and I'm looking at upgrading my steppers to these motors. I started out with an Anet A8 and I'm still using the stock T8 leadscrews. My question: how does the step angle of 1.8 affect these leadscrews? I'm primarily concerned about hardware. Can I fit these leadscrews to these motors, change the printers config appropriately and I'm good to go or do I need some additional hardware?

    Cheers!



  • if you are upgrading the steppers you might want to consider 0.9 degree steppers for x and y.

    the motors will work with the coupler of the anet a8 lead screw.
    the angle of 1.8 is the same as the original anet steppers. this is generally not a problem as this results in 400 steps/mm.

    are you using the original acrylic frame of the anet a8 or have you switchted to an am8 setup? this is in my opinion a must, because the frame will limit you otherwise.



  • @Veti I've switched to AM8 and I'm also in the process of doing the BLV mgn12 upgrade. Thanks for the info on the stock Anet stepper motor angle - I read somewhere else that the step angle was 0.9.

    As I understand it changing to a 0.9 degree stepper will increase print precision but decrease maximum motor speed - is this correct?

    Thanks



  • @johno4321 said in Stepper motors & Z lead screws:

    As I understand it changing to a 0.9 degree stepper will increase print precision but decrease maximum motor speed - is this correct?

    yes it will reduce max speed. but you wont be operating at those speeds anyway.
    for a discussion of 0.9 vs 1.8 on prusa printer have a look at this. https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-user-mods-octoprint-enclosures-nozzles-.../stepper-motor-upgrades-to-eliminate-vfa-s-vertical-fine-artifacts/

    blv recommends 0.9 x and y degrees for his newer project, the blv qube.

    you might also want to replace the couplers with jaw couplers, or place one ball bearing inside the coupler to reduce any springiness of those couplers.


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