[undecided]

Hello

I am new to the forum and to cnc. I have been trying out several different programs and I am going to be using mach 3 for my router. I downloaded cambam and can generate a tool path and run it in mach 3. The first few times when I ran it in mach 3 it followed the toolpath very closely on the screen but now it makes very sweeping turns in the corners and along any sharp curve except where it makes a z move and it goes all the way to the corner, looks like it follows the straight lines ok. Could I have changed something in mach 3 to do this. I have not changed the g codes at all and have used cam bam to regenerate the tool path but mach 3 does the same. Any sugestions?

Thanks in advance for any help you may be able to provide.

Neal

[undecided]

Almost forgot to say I did go in and adjust screen size so it enlarges to my monitor size

Neal

[LeeWay]

It may be the CV setting. Constant velocity or Exact stop.
For me, Exact stop is too slow and jerky. CV is a better setting. I have to slow the feedrate on tight arcs and corners, but it follows pretty nicely otherwise.

[10bulls]

Hi Neal,

As Leeway says, it does sound a lot like a CV issue.

Constant velocity is greatly affected by your acceleration settings. Try increasing your acceleration in motor tuning in Mach3 and see if this helps at all.

Good luck!

[undecided]

I think I have it fixed. Some how in all my excitement over the weekend of playing with cambam and mach 3, I some how got the feed rate in cambam set to a very high number, backed it off to 30 to 50 and it works much better.

Thanks, Neal