Nema 17's

Looking for input on what nema 17s to get. I'm doing the prusa v2 I already looked at the wiki page but was looking for some insight on what motors worked better or not so well. For what its worth I was thinking the 2 for the z axis could.be smaller than the others since they will be wired together.

Would like some suggestions from u guys? Is there a specific motor that gives that sweet spot or will any nema 17 within 40-60 torque range do?

i think the vast majority of us run the 17HS4801 nema 17's,

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thejollygrimreaper Wrote:
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> i think the vast majority of us run the 17HS4801
> nema 17's,


So just 5 of these? I seen where some use all the same for all axis while others use 3/2 srtup

yep 5 if its going on a prusa

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You can use two smaller 38 oz-in NEMA17's for the Z-axis if your printer uses two motors so that might be what you have seen. The two-motor z-axis design splits the load between 2 motors and for many printer designs the z-axis only ever increments once per layer whereas the other motors (the extruder, y-axis and x-axis) are running constantly and reversing often so do a heap more work. Probably easiest to just buy 5 x 78 oz-in motors as you know they will do the job for all the motor spots on your printer.

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Wired1 Wrote:
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> You can use two smaller 38 oz-in NEMA17's for the
> Z-axis if your printer uses two motors so that
> might be what you have seen. The two-motor z-axis
> design splits the load between 2 motors and for
> many printer designs the z-axis only ever
> increments once per layer whereas the other motors
> (the extruder, y-axis and x-axis) are running
> constantly and reversing often so do a heap more
> work. Probably easiest to just buy 5 x 78 oz-in
> motors as you know they will do the job for all
> the motor spots on your printer.


I figured as much and thanks for that. My main concern was running larger nema 17's for the z axis going to tax the ramps 1.4 and the a4688 pololu's?

No concern. Pololu's are current-regulated, meaning that it is not the load who decides what current will go through but the preset value (that you set).

Oh OK and I meant a4988 lol I.have not got that far into reading yet. I'm bout to pull the trigger on my printed parts motors and hot end after that its a few odds and ends and.I will be putting er together