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16-08-2021 #1
Hello!
It took me a while to get this build close to finish (changed 2 jobs, got 3rd child...) but only major decision left to make is what motors and controller to use. So I would like some help from more experienced members, please...
I purchased 3232 screws for X and Y and went with a rotating ball nut design inspired by Jonathan and others (from this thread
( http://www.mycncuk.com/threads/3340-...t-design-ideas ). Z is 1605 screw.
I would like a recommendation for motors and controller.
Initially, I was thinking to go cheap and easy mach3 controller and nema34 motors motor kit from Ebay:
https://www.ebay.com/itm/19372726708...wAAOSwmYhcuARF
4x 5.6N.m nema34 motors and drivers with power supply and controller for about 500EUR.
Inductance is 4.1 nH.
I have an old Dell pc with a parallel port which I was planning to use for this.I have similar Nema24 kit from ebay installed on my first learning machine and it worked well. Wish I knew about motor inductance then tho :p
My gantry is about 50-60kg and will be belt driven by two motors.
There will be 2:1 reduction (20:40 teeth) and I am aiming for 10m/min rapids, that means that I would require about 600 rpm from motors.
Dimensions of my machine will be 3m x 1.8m, z travel 20cm.
I have bought ATC 3.2kW spindle.
This machine will be for cutting wood and doing 3D relief in wood.
So I guess that those motors would be enough for this purpose? Should I go for Nema24?
I was also considering Lichuan Nema34 3Phase 220V 10N.m LC86H3129+LCDA2260H Closed loop steppper motor & drive from Ebay:
https://www.ebay.com/itm/17406540143...sAAOSwRmldpWft.
But is that overkill for rotating nut? They are pricy but were recommended by JAZZ in my other thread and elsewhere on forum. Also,I guess I wouldn't need such powerful motor for Z (it will be also belt driven 1:1, if not suggested otherwise).
I am open for suggestions.
I was thinking to spend about 1000 EUR for motors, drivers and controller. Not looking for absolute best, just best buy option (bang for buck).
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