Need Help!- Drive Nut and threaded rod.

[Marwell]

Howdy all,
I finished my router about 2 weeks ago, the table is 16 X 32, cutting area is approximately 14 X 26. Runs nice using Mach 3 and Vectric Software.

The only issue am having is that I think I am getting too much drag on the leadscrews. I am using 1/2" - 10 Acme threaded rod and brass nuts. Does anyone have any suggestions as to a decent replacement. I would like to keep it to around the 1/2" mark.

I do not want to sink too much money into the system as I plan on buying a full size 48 x 96 machine in the next 6 months or so. I will keep this one as a standby and for smaller jobs.

[Thazul]

I use 1/2"-10 acme screw on my Z Axis with a homemade delrin plastic nut, it works great.
I'd like to get a little more speed though, I'm thinking of switching it to 1/2"-8 2 start.

Check out some of the Joe's CNC builds, they're using 1/2"-8 2 start, and 1/2"-10 5 start screws with these Anti-Backlash nuts:
http://www.dumpstercnc.com/leadnuts_acme.html

1/2"-10 = 0.1" per rev
1/2"-8 2 start = 0.25" per rev
1/2"-10 5 start = 0.5" per rev

-

Andy

[johnmac]

Delrin nuts are the way to go. Dumpster CNC is as good a place as any to get them. Don't let the "plastic" part scare you.

John