Which motors do I need?

[Juancar]

Hi there!
I´m planning to build a CNC foam cutter similate to the one you can see at http://www.8linx.com/cnc/cnc.htm

I´m not sure of the torque I need, how much oz-in must have the motors??

Thanks!

[CNCadmin]

Not much in terms of torque 50-100oz would be fine.

[Juancar]

Thanks for this fast answer ;-)
Another question: Sometimes I see motors at ebay but the seller doesn´t indicate the torque, can I estimate it by the volts, amperes and ohms??

Thanks.

[GAWnCA]

OK, I've seen the foam cutter from 8Link as well and would like to build one that will cut up to an 10" x 20" x 96" block of foam. I would like to know where to get the parts, motors, controller, power supplies for both the controller and the cutting wire. I know that all teh motors have to drive is the cutting wire so I guess whatever was used on that system would be fine. Any suggestions will be greatly appreciated.

[HobbyCNC]

Originally Posted by GAWnCA OK, I've seen the foam cutter from 8Link as well and would like to build one that will cut up to an 10" x 20" x 96" block of foam. I would like to know where to get the parts, motors, controller, power supplies for both the controller and the cutting wire. I know that all teh motors have to drive is the cutting wire so I guess whatever was used on that system would be fine. Any suggestions will be greatly appreciated.

http://www.hobbycnc.com/foam/4aupcwh...aupcwhcpkg.htm

Dave Rigotti
HobbyCNC.com

[GAWnCA]

So Dave, which system do you suggest?

[HobbyCNC]

Originally Posted by GAWnCA So Dave, which system do you suggest?

Use the 84oz for hobby type machines, the 127oz for larger heavier machines.

Dave Rigotti
HobbyCNC.com

[GAWnCA]

Thanks again Dave.

[KPDamen]

Hi, I saw that the question was already answered.. Anyway for a foamcutter light stepper motors will work just fine. In the order of 0.5nm which is equal to 70.8 oz/in. I have built several machines with these type of motors. They work great. Are actually pretty quick as well. Had to slow the cutting down in order to get a nice cut in the foam. The wire starts to drag when youre going to fast...
Greetings, Kevin

www.damencnc.nl (The users gallery might give you some ideas, also a video of engraving is available)

[GAWnCA]

Kevin,

Thanks for your reply and the URL. I am finding some valuabel information on your web site. I just need to get my old brain working. May I call up on you for instructions, should the need arrise?

Greg