ebay board kits v 542 boards

[Musht]

Just dinnae go near TB6560 based drivers, they are a short route to frustration.

Have just blown second 6560 in less than a month, guessing its actually back emf that kills them, this one was Y axis driver after fine engraving, lot of Y back and forth think the driver either thermally cooks or direction change kills the output devices.

Most expensive is having a piece of equipment sitting idle waiting for parts.

Personally thinking either 542 or Gecko boards to replace the fragile 6560s...

http://www.charter-controls.com/inde...b_y=0&offset=5

4X4 is actually a large table and cost of motors and drives will be a small part.

Cheers
Adam

[JAZZCNC]

Don't go anywhere near either of those.!!. . . Bad news.

I urge you not to rush into buying any motors or drives, psu etc untill you have fully got the design and know the components like ballscrews pitch etc and mass to be moved.

One of the biggest mistakes folks new make is to rushout and buy motors etc then regret it because they either arn't large enough or just plane rubbish like the ebay offerings.
The other often misunderstood is voltage and it's very common for folks to buy too lower voltage PSU's that don't get the best out of the motors. the other is to buy drives with too low voltage limit.
Stepper Motors work best with high voltage, a typical motor would be nema 23 at 3nm. These motors perform best with around 60-70V but it's very common for people to buy drives with a 50V limit and even more common to use 36V psu's with these drives. (Namely because they are sold in kits like this from suppliers like cnc4you etc or the only PSU's they supply are 36Vor 48V)
So as you can see the machine would be quite crippled with a setup like this and trust me it happens often because I'm always helping people who have been sold this kind of setup.

It's not difficult choosing the right setup but does need carefull attention and really if you want to get it right first time then don't try saving pennies because it will cost you pounds further down the line and lots of frustration.

Decide on the machine size, style and it's components then ask. Then and only then start buying expensive items which are critical to a good cnc machine like drives and PSU's, motors are relatively cheap in the grand scheme but can easily be crippled with the wrong choices.