Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: gaanes on September 07, 2010, 02:18:12 PM

Title: Steppers and constant contour under Mach 3?
Post by: gaanes on September 07, 2010, 02:18:12 PM
I am looking at upgrading my stepper driven system (currently Ahha), does Mach 3 make the steppers constant contour instead of stopping at every line (jerky slower movement) like the old Ahha does? I want to upgrade to Mach 3 so I can run Windows and have a modern computer with networking and a USB port. Also the old Ahha Artisan didn't constant contour very well. Maybe I'm spoiled from our large servo driven system (Fagor).
Title: Re: Steppers and constant contour under Mach 3?
Post by: Hood on September 07, 2010, 02:29:12 PM
Yes, G64 in Mach puts you into Constant Velocity mode, G61 is Exact Stop.
Hood
Title: Re: Steppers and constant contour under Mach 3?
Post by: monty62 on September 07, 2010, 05:27:42 PM
if anyone can help i have just started using mach 3 and when it should cut square its starting to go to the next coordinate before its finish the cut its on thus rounding the corners off. what should i do?
regards les




















Title: Re: Steppers and constant contour under Mach 3?
Post by: Hood on September 07, 2010, 05:31:38 PM
Sounds like your acceleration is slow so you are getting corner rounding. Run in G61 (exact stop mode) and it should help. There are settings to turn off G64 (Constant Velocity) on sharp corners and think there may be info on setting this up in members docs section of the forum.
Hood
Title: Re: Steppers and constant contour under Mach 3?
Post by: gaanes on September 07, 2010, 11:33:27 PM
Even steppers? Not just servos?
Title: Re: Steppers and constant contour under Mach 3?
Post by: Hood on September 08, 2010, 02:26:44 AM
Quote from: gaanes on September 07, 2010, 11:33:27 PM
Even steppers? Not just servos?

Yes

Hood
Title: Re: Steppers and constant contour under Mach 3?
Post by: stirling on September 08, 2010, 03:35:01 AM
Quote from: gaanes on September 07, 2010, 11:33:27 PM
Even steppers? Not just servos?
Just curious but why would you think there was a difference between steppers/servos with regards CV?