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Z-Axis Motor Specs

@Bee sorry, that was a msg w Bar


No worries - thanks for giving me a peek at it.

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The link on the wiki for the Z-axis motor specs leads to a dead page. I found a PDF using the motor specs here: but I’m not sure if any of these are the same as the one in the kit. I think the last page is the correct one, but I’m not sure of the model number.

Anyone more savvy with this motor want to check to make sure this is the right one? We should probably update the wiki to either have the specs embedded in the page or have the PDF in github itself so that we’re not relying on an external link which can get changed on us.

I’m trying to figure out the RPM after the gearbox, that way I can plan out a Z-axis that uses more ideal feedrates.

I will contact ETONM and ask for a data sheet to put in GitHub


We should probably do a reality check of the gear ratio for this motor, too.


I’ve added the datasheet to the GitHub repository here. It should help with finding a comparable motor, but it does not list the gear ratio so we may still need to take one apart for full documentation


And if it’s like the chain motors you can’t trust the specs anyway.

It’s like the Chinese electronics where they grind off the chip numbers. There’s no real protection against another manufacturer copying your devices so I guess it’s a form of protection against that

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In playing with my Maslow this evening, I decided to do a quick and dirty RPM test for the Z-Axis motor. I filmed the motor turning 3 times, or 12mm on the Rigid router base. I flipped through the frames to count when it hit the same exact point on the mark as when it started. I count 14.3 seconds for all three revolutions. That gives me ~12.6 rpm from the gearbox.

On a side note, now I know why there’s such a gear reduction. 12mm in a little over 3 revolutions is a lot of torque that the motor needs to be outputting.


How about just putting up the Z-axis motor on the store?

It is, right?

I guess it’s the whole kit instead of just the motor, but I can’t imagine it being much use without the cable to plug it into the board and the bracket to mount it


I am checking if my z-axis motor that i got from the maslow poeple is troubling for us.
So i am thinking to get a new one…
Is this the correct one ?

are you in usa? sells some.
the one you listed will work, but an encoder must be added to the end of it with 3ppr.
stock z axis motor was only 12rpm, most people seem to be going to a faster one in the 50 to 100rpm range.

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Thank you…
Yeah we are in Holland << Europe.

So this person at aliexpress asks more details for the motor.
I used that picture from the other person in this thread.
Is the ET-SGM37F-1222 with a gear ratio of 90:1 correct to ask for prcing at alixpress… ?

well that would depend on what router you are using and what kind of z axis you have with what pitch. if you are using the Makita 0700 or similar clone palm router then 12rpm might be fine since the z axis is controlled by a pretty course screw. you would have to buy a Chinese c beam z axis and clamp or 3d print a stage for the motor to direct turn the routers z axis.

like I said before something in the 50 to 100rpm range is what people are moving towards using a 2mm pitch lead screw.

the default zaxis on the original maslow has a lot of room for improvement. There are many people that are making their own improved z axis.

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So i did the same thing… backed it out all the way on accident and stripped a gear in the motor drive.

Got a new motor with 100Rpm output and 100:1 gear ratio. Fits everything fine… what do I change in maslow settings and what do I change in gcode? There’s a z-axis pitch, but it seems more like one of the gcode settings like from this is the motor.

NVM, found it under advanced settings -> Z Axis Encoder Steps per Revolution

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I guess when you can freely turn the shaft of the z axis motor, it’s time to order a replacement? I’m going to give the one you posted a try.

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I have not been disapointed!

What did you do to make the connection to the maslow’s cable? I see it has a soldered on pigtail.

edit: nevermind… I just discovered some parts I recently ordered that arrived today have a handful of female connectors that I can solder onto the pigtail… sometimes things just work out.

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