Re: Routing speed?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "wdavis364" <wdavis@...> wrote:

>
> Building a Mill.
> Shopping around for lead screws.
> What would be the ideal routing speed for cuting out circuit boards.
> The motor I have run verily smooth at at or over 200 rpms 1/8 step. At
> 5 tpi would put me at 40 inches per minutes. Is this too fast, too slow?
> I have no idea as to what speed to look for.
> Most of the lead screws I see for sale is at 5 or 6 tpi.
> I want to drive the lead screw direct with 269oz stepper motors.
> Sure need some advice on this before shelling out the bucks here.
> thanks
> bill

Hi Bill,

If all you are doing is circuit boards, then 269 oz-in is WAY overkill.

I have 35 oz-in on mine and it never bogs.

I think the spindle is 35,000 RPM and it routes the board at 20 ipm.
It etches the traces at about 8-12 ipm.

Best to start at one speed and ramp up until you hear something
complain. Then cut to about 80% of that speed. The cutting breaking
would not really be a complaint as it is more of irreconcilable
differences.

Dave