Hi guys, apologies if I've posted in the wrong location or if it's been covered umpteen times already.
I have absolutely no CNC experience whatsoever, but I'm a tinkerer and love trying to make things just for the hell of it which has led me here.
I am attempting to make a CNC (for wood and aluminium) measuring approx 600mm x 600mm. I have had a look over a few threads trying to gather info, but I'm struggling a bit.
I have plans for the machine, but after reading about the stepper motors the plans recommend, they could well be too 'underpowered' and are miles apart (specs wise), they are:-
1st recommended is a Nema 23
2.3 v
2.8 A
0.83 ohms
2.2 mH
The 2nd is a nemá 23
3.08 v
3.0 A
1.1 ohms
3.6 mH
I'll be using 4 motors and am thinking of using a DM542 stepper driver for each (as opposed to the TB6600 suggested in the plans) and an Arduino uno 3 (or raspberry pi3??), there's also 2 x SFU1605 ballscrews.
I have researched other motors and found the following:-
1st choice nema 24 2 phase
2.5 v
5.0 A
0.5 ohms
2.2mH
2nd choice nema 24 2 phase
1.4 v
4.0 A
0.35 ohms
1.3 mH
...my questions are...
1. Are the nema 24 overkill?
2. What size power supply should I be looking at for 4x nema 23 or 4x nema 24?
3. What driver should I use...DM542, DM556 or R60???
4. Does the inductance really matter that much?
5. What current, inductance etc should I be looking at?
Going off a calculator in one of the threads, am I right in assuming the rpms are (respectively), using a 36v power supply...
1st nema 23 = 876 rpm
2nd nema 23 = 500 rpm
1st nema 24 = 490 rpm
2nd nema 24 = 1038 rpm
Any help would be much appreciated, please bare in mind I know nowt about CNC etc, so layman's terms please. Thank you.
Mick