Questions about computers impact on speed of router

[Hack]

I am using an old Pentium 200Mhz to control my cnc router. Using Xylotex 3 axis board, turboCNC and Automation direct 270? oz/in steppers and 1/4-20 allthread for leadscrew.

I am currently cutting at about 15 in/min with good results, but am unable to get my rapids much faster than 20 ipm. I understand that the biggest limit is due to the threaded rod, but I am wondering if upgrading the computer would help as well.

The reason why I ask is even when running a simulated run of my g-code, if I bump up my feed settings say from F15 to F25, I do not gain much time on my cutting. A program that takes say 30 minutes on The F15 setting might gain 30 seconds by bumping up the speed to F25.

Also, cutting parts with lots of circles really seems slow. I know there is is setting in Turbocnc to adjust this a little, but again is the processing power of the computer affecting this, and by how much?

Thanks

Dan

[ger21]

With TurboCNC, a faster computer probably won't make much difference. You should be able to increase your arc speed by playing with the setting you're talking about. Are you making a lot of short cuts? TurboCNC doesn't have constant velocity, so it has to start and stop for each segment. If the segments are short, and it just accelerates and the decellerates right away, a faster Feed won't actuall go faster, because it may not actuall ever get to that speed. You could try lowering your start speed way down, and increasing acceleration and see if that helps any. 20ipm is pretty good with 1/4-20 rod. Switching to 1/4-12 acme would probably double your speed.