8mm lead for z too much?
Posted by navyblueboss
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8mm lead for z too much? May 09, 2015 09:41AM |
Registered: 9 years ago Posts: 25 |
Im looking into leadscrew for my z movements. Ive found some, but the pitch is 8mm. Isnt that too much? I dont know how much steps that will be but its a lot less than what its now. (5mm threaded rod). Im affraid the layers wont be as precize as using leadscrew with a 2mm pitch.
Edit: I mean the lead, not pitch. So the distance the z moves when you turn the rod 360°
Edited 4 time(s). Last edit at 05/09/2015 10:08AM by navyblueboss.
Edit: I mean the lead, not pitch. So the distance the z moves when you turn the rod 360°
Edited 4 time(s). Last edit at 05/09/2015 10:08AM by navyblueboss.
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Re: 8mm pitch for z too much? May 09, 2015 10:13AM |
Registered: 11 years ago Posts: 5,780 |
If you're driving the screws directly with a 200 step/rev motor and using 1/16 ustepping (both typical), there will be 3200 usteps per rev of the motor. 1 rev will move the Z axis 8 mm. 3200 usteps/1 rev X 1 rev/8 mm= 400 usteps/mm. A 100um layer move will require 40 usteps. Yes, it is OK.
Edited 1 time(s). Last edit at 05/09/2015 10:13AM by the_digital_dentist.
Edited 1 time(s). Last edit at 05/09/2015 10:13AM by the_digital_dentist.
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Re: 8mm lead for z too much? May 13, 2015 05:51AM |
Registered: 8 years ago Posts: 17 |
Are you sure that the pitch is 8mm? That is a very very coarse thread and will require massive torque to move things with. I suspect that the 8mm refers to the diameter and not the pitch, A leadscrew with a 8mm pitch would probably be very thick and not something you would be putting into a printer.
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Re: 8mm lead for z too much? May 17, 2015 11:35AM |
Registered: 9 years ago Posts: 136 |
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Re: 8mm lead for z too much? May 17, 2015 01:06PM |
Registered: 9 years ago Posts: 25 |
Quote
Yellobello
I have the same leadscrew.see sunhokey i3 printer
Sir, i cant thank you enough. Im not going to buy those leadscrews, im going tot buy that whole printer you just mentioned. Bowden setup, leadscrew, SD reader and no printed parts!
Plz tell me, where did you get yours? And are you all happy about it?
Edited 1 time(s). Last edit at 05/17/2015 01:07PM by navyblueboss.
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