[jjlee32]

Hi Friends,

I had this question posed in a different place but i think this one is better suited to get the help i need.

I am in the middle of designing a tangential cutting head for a CNC I am building. I plan to have the cutting head have a servo motor and i am working on spec'ing that motor now. For the machine I am using a super fancy kit I got from china, Bulkman 3D that came with and outdated control system (mach3) and what i am learning might be not standard/good/decent motors. I am using a RP4 and a Mesa 7i96 that I have LCNC running on but still need to talk to the Mesa (separate thread to come later lol) to run the basic code stuff based on a recommendation from a different post.

I would ideally like to not upgrade any power supplies ill my probably foolish problem below:

Supplied Power Supplies
1- 52.8 W @ 24V
2- 348 W @ 24V

Total Power = 400 W @ 24 V (16.6 A calculated)

Supplied Motors:
4 x Rated Voltage - 3.6 V
Rated Current - 3A

It would seem at peak the motors that control the XYZ axis' will consume 3A * 4 = 12A, so i should have up to 16.6 A - 12A = 4.6A minus some safety factor to work with? Is this correct or do i need to review my circuits notes?

Where i get hung up is the voltage and this might be a misunderstanding of the stepper drivers but i find some that fit my requirements (nema 23 frame size and 0.25" shaft with encoder) that vary from as low as 2.6 up to 24 V. Below are some of the ones that i am looking at but i feel like i might be missing/ not considering something here. Does any of this matter or does the magic happen in the stepper controller?


24-80 V
https://www.mouser.com/ProductDetail...FJ6olrdQ%3D%3D
2.3 V
https://www.mouser.com/ProductDetail...6iHymguA%3D%3D

Kit I am planning on attaching the head to (minus UC300 and mach 3, plus RP4, Mesa Card, and LCNC)
https://bulkman3d.com/product/queenb...-rail-upgrade/


Any help is greatly appreciated!

[jjlee32]

What concerns me among other things is the drivers they supplied claim to be rated for 3.6V and the drivers have an output from 9-23V, do i need to replace these stepper drivers as well?

Motor voltage is on the drawing on this link:
https://bulkman3d.com/product/queenb...t-1000x1500mm/
Driver that came with the kit:
https://www.amazon.com/Stepper-DC9-4...MaAhypEALw_wcB

Is there something obvious i am missing here>