My first part

[JIMMY]

Thank You very much for the information. I am going to check it out. Thanks again.

[JIMMY]

Those are great web sites, I want to thank you for the info. I am sure I will have more questions later. I am definitly going to build a cnc router.

[bcromwell]

What did you do for bearings? Linears running on the pipe or am I not seeing the rails??

[JOE65]

I took advantage of J.C.K's hard work. They are rollerblade bearings running on gas pipe. Very affordable!

Oh and someone asked what controller

Fet3/crusier package from stepper world

I've got to figure a way to get more speed from this sytem.

Still not shure exactly how big my cutting area is.

I was shooting for 2' x 4'

It takes so long to move around at 7.5 ipm I havn't tested/used the whole area yet.

[balsaman]

One way to get more speed is to use higher voltage and different resistors. Another is lead screws with less pitch. I use the FET3 and get 40+ inches per minute on 1/2-10 acme rod and 27 volts.

What pitch screws? What voltage motors? What voltage powersupply?

Another way to get more speed is a chopper controller such as the xylotec.

Eric

[JOE65]

Thanks guys

I'm using the stock Fet3/cruiser setup

4.5 v motors
12v power supply
1/2" - 13 threads per inch "lead screw" (hardwarestore threaded rod)

[anoel]

Joe, I'm using 4v motors right now. when I was running them on 12v the best speed that I could get was about 20" per minute using 5/16 18tpi threaded rod. With the same controller/motor setup and bumping a 24v power supply i can jog at over 40" per minute now. With 1/2 10 turn acme rod I could probably get as high as 60" - 70"

Seems like I read somewhere (Maybe Camtronics' site.. I dunno) that best motor performance is with a minimum of 4x the motors spec'd voltage.

FWIW I was really impressed at what upgrading the power supply did for me.

[balsaman]

Are those Nema 34 motors? If so they can also be part of the problem. Nema 23 are a little faster generally.

Eric

[bcromwell]

Originally posted by JOE65 I took advantage of J.C.K's hard work. They are rollerblade bearings running on gas pipe. Very affordable! Oh and someone asked what controller Fet3/crusier package from stepper world I've got to figure a way to get more speed from this sytem. Still not shure exactly how big my cutting area is. I was shooting for 2' x 4' It takes so long to move around at 7.5 ipm I havn't tested/used the whole area yet.

Can you snap a close up of it I would like to see the bearing setup.

Thanks

[JOE65]

Here is a shot of the rollerblade bearings on gas pipe. First introduced by J.C.K. The shot doesn't show it but there is another bearing at 90 degress to each of these.