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Stepper motor torque

tanner331

Stepper motor torque
February 14, 2017 02:05AM

Registered: 9 years ago
Posts: 56

Hi
I am looking to design a 3d printer and I was wondering how much torque is required from each motor?
The style of printer I was planing on building is similar to a Prusa i3.
Mainly I was wondering how small of a stepper can I use for the two z axis motors?
Thanks
Tanner

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o_lampe

Re: Stepper motor torque
February 14, 2017 03:12AM

Registered: 8 years ago
Posts: 5,232

I'm using two NEMA17 steppers with 40mm body and 0.4A and they stall pretty easy, when the current is set to low.

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dc42

Re: Stepper motor torque
February 14, 2017 03:27AM

Registered: 10 years ago
Posts: 14,672

My Ormerod uses a single 34mm long Nema17 with a torque of about 24Ncm at rated current for each axis and extruder, and the torque is adequate. The Z screw has a pitch of 0.8mm. A Z screw with a courser pitch might need a more powerful motor. The extruder is geared about 3:1. Ungeared extruders need high torque motors.

Edited 1 time(s). Last edit at 02/16/2017 02:48AM by dc42.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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Govahnator

Re: Stepper motor torque
February 15, 2017 07:18PM

Registered: 9 years ago
Posts: 199

Don't buy small ones.

Bigger ones cost only slightly more, they are worth it.

Search preferably for 1.5 A motor's with around 55Ncm., 1.8 degrees that is

They run so much smoother then those small nema 17's.

Edited 2 time(s). Last edit at 02/15/2017 07:21PM by Govahnator.