Posted by rohit939
 threaded rod steps. April 15, 2017 06:32AM Registered: 3 years ago Posts: 6
hello
i want to configure steps in marlin
but dont know how to and what to change.
i am using these threaded rod
[www.ebay.in]?
 Re: threaded rod steps. April 15, 2017 09:22AM Registered: 9 years ago Posts: 2,453
M8 thread has 1.25mm/1. If you have a standard 1.6° 200 steps/1 stepper motor 1mm will take 160 full steps These 160 full steps need to be multiplied by whatever microstepping you use, if it is 32 you get 5120 steps/mm.

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 Re: threaded rod steps. April 15, 2017 09:13PM Registered: 3 years ago Posts: 13
Quote
Srek
M8 thread has 1.25mm/1. If you have a standard 1.6° 200 steps/1 stepper motor 1mm will take 160 full steps These 160 full steps need to be multiplied by whatever microstepping you use, if it is 32 you get 5120 steps/mm.
Um, 360 degrees/200 steps = 1.8 degree/step but otherwise correct.
 Re: threaded rod steps. April 16, 2017 12:53PM Registered: 3 years ago Posts: 6
in marlin
its #define DEFAULT_AXIS_STEPS_PER_UNIT {100,100,400,100} // default steps per unit for Ultimaker
i think 400 is for z axis, still dont know what to change ? and what to write
can you guys help me with full calculation method?
 Re: threaded rod steps. April 16, 2017 01:07PM Registered: 3 years ago Posts: 6
here's the formula. steps_per_mm = (motor_steps_per_rev * driver_microstep) / thread_pitch
according to this i'm getting 2560 steps so what should i write instead of 400? calculations? and i'm talking about threaded rods not lead screw.
 Re: threaded rod steps. April 16, 2017 02:44PM Registered: 9 years ago Posts: 2,453
Quote
seattle_phil
Quote
Srek
M8 thread has 1.25mm/1. If you have a standard 1.6° 200 steps/1 stepper motor 1mm will take 160 full steps These 160 full steps need to be multiplied by whatever microstepping you use, if it is 32 you get 5120 steps/mm.
Um, 360 degrees/200 steps = 1.8 degree/step but otherwise correct.
Bugger, it felt off, but i did not see the error. Thanks for the correction.

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 Re: threaded rod steps. April 20, 2017 12:51PM Registered: 3 years ago Posts: 23
I actually found this [www.prusaprinters.org] googling for an equation to calculate this.

You probably solved it but ... for future refference xD
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