Bought a cnc machine, need a lot of help

[Paul53]

The next question is all about the steeper motors, do I buy a kit, or buy it all seperateIy, I know the previous owner had Nema 23 steppers, there are alot of Chinese kits on eBay, which is the best way forward with this? Thanks

[Clive S]

The next question is all about the steeper motors, do I buy a kit, or buy it all seperateIy, I know the previous owner had Nema 23 steppers, there are alot of Chinese kits on eBay, which is the best way forward with this? Thanks

Kits are never matched. motors you need low inductance 8 wire https://www.cnc4you.co.uk/Stepper-Mo...YGH301B-Nema23

if you want to future proof the machine or build another then use 80V drives and 68V toroidal power supply

[Paul53]

Thank you so far for the help and advice, my head is still spinning with all the info that is out there, I have been on the cnc4you website, as suggested Clive s to look at the NEMA23 stepper motors, they also do a kit https://www.cnc4you.co.uk/CNC-Kits/S...-3-Axis-Nema23, is it ok to get get the kit here, or just stay away from a kit as mentioned in a previous comment, and buy all separately? I am afraid there are going to be a load of questions and advice in the coming days and weeks, so I will apologise in advance. Thank you

[driftspin]

Thank you so far for the help and advice, my head is still spinning with all the info that is out there, I have been on the cnc4you website, as suggested Clive s to look at the NEMA23 stepper motors, they also do a kit https://www.cnc4you.co.uk/CNC-Kits/S...-3-Axis-Nema23, is it ok to get get the kit here, or just stay away from a kit as mentioned in a previous comment, and buy all separately? I am afraid there are going to be a load of questions and advice in the coming days and weeks, so I will apologise in advance. Thank you

Hi Paul53,


Do you feel you could build a toroidal transformer based power supply your self?

People here like the ~68volt DIY PSU icw 80v digital drives.

I build one too and do not regret it.

A simple DIY PSU consists of a transformer, rectifier and capacitors.

I bought my nema23's from cnc4you also.


Grtz Bert.







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[routercnc]

You could buy that kit and it would technically run your machine.

It does have low inductance motors (3.2mH) when wired in parallel, which is what they are recommending in the wiring diagram so assume their PSU can supply the higher amps required.

However, it is only running at 36V which is quite limiting for useable speed range until you run out of torque and start missing steps.

A 50V system would be better, or as most guys end up go for the 70V system. It’s one of those buy a quick system now and loose money in the long run when you find the limits or go with the final solution to start with.

[Paul53]

You could buy that kit and it would technically run your machine.

It does have low inductance motors (3.2mH) when wired in parallel, which is what they are recommending in the wiring diagram so assume their PSU can supply the higher amps required.

However, it is only running at 36V which is quite limiting for useable speed range until you run out of torque and start missing steps.

A 50V system would be better, or as most guys end up go for the 70V system. It’s one of those buy a quick system now and loose money in the long run when you find the limits or go with the final solution to start with.

So, decided to go with 8 wire NEMA23 stepper motors and go for a 70v system, need pointers on where to get the kit, steppers, drivers, BOB etc, well everything really, quite a few items on aliexpress. could you point me in the right direction please. Thanks