Wooden CNC

[njhussey]

Ther are 2 ways you can go, one is to use Trapeziodal leadscrew which is the closest to the stuff they're linking to or the better solution will be to get ball screws from China. The trouble with the Trapeziodal is that you'll struggle to get enough speed to cut wood and that backlash creeps into the lead nuts due to wear so you're constantly adjusting them.

It's easy enough to specify the ballscrews you want to someone as all you need is the length and the machining you want on the ends. I'm not too sure who the current favourite supplier is, I think I've seen the name Fred banded about but I'm sure someone will come along and chip in shortly....

THe ballscrew I'd recomend is a 1610 with BK & BF end supports. The data sheets for these are freely available on the internet, just google them. When specifying the machining I'd add at least 15mm to the F dimension (I think!!) so that you've enough space to fit your pulley/coupling or whatever you're using to connect to your stepper.

With regards to your steppers and drivers, I'd recomend these http://www.zappautomation.co.uk/stoc...tor-48577.html and drivers these http://www.zappautomation.co.uk/elec...ion/em806.html I realise that the drivers are expensive but I can almost guarantee that you'll want to upgrade once you've got your machine working and have hit the limitations of it and these will be transferable. For the BOB then I'm not too familiar with the cheaper end as I'm using a CSMIO IP-M which is a fantastic bit of kit but quite expensive. I believe CNC4you do some good cheap ones, you'll need a 4 axis one at least as you're using slaved steppers on your X (or Y as they call it in the US) axis http://www.cnc4you.co.uk/Breakout-Board-and-PSU%27s

Hope this helps....

[Andyshomecrafts]

Thank you so so much for taking the time out to explain it, I really appreciate it.

[njhussey]

Thank you so so much for taking the time out to explain it, I really appreciate it.

No problems, I'm still learning but happy to give help where I can :)

[Robin Hewitt]

5 starts with a Delrin nut? I remember those, I have one somewhere, marvellously tight on the nut and smooth as silk.

RS used to sell them, search RS for lead screw.