I sure am glad I purchased Mach3. Will be worth the cost.
The forum & fellow users have helped to make my introduction into the cnc world alot smoother.
I am a little overwelmed with the gratious replies. Many thanks to all. They have allowed me to be pointed in useful directions to try & resolve this jerky problem. Someday I will be a knowledgeable source to contribute back to this forum.
Back to the problem:
Did one simple test. Drew a 3 inch circle in TurboCad & also drew a 3 inch circle in V-Carve Pro. Loaded the TurboCad dxf into Mach3, did the g-code conversion, then cut the circle at 100 inches/min. Great cut, very smooth x & y movements. NO jerkiness whatsoever. Generated the toolpath in V-Carve Pro (profile cut only), loaded the g-code into Mach3 & cut the file. Movement of the x & y was somewhat jerky. Within Mach3 I engaged & disengaged the CV settings (60/20). Got the best cut with the CV settings turned off.
Result: there is something different between how things are drawn then coded, then cut.
Eventhough the V-Carve file was a little jerky is was nowhere near how aggressively jerky my main project was. Still no closer to resolving that issue, but here is what the difference was:
Project drawn in AutoCad 2000, saved as Version 12, loaded into V-Carve, drawing was editted slightly, toolpaths were created, files loaded into Mach3, then cut. Tried all sort of recomendations by the forum replies with no noticable improvement.
I know that the complexities & compatability issues of programs will always play a part towards the success of any project, so with alittle help along the way a person will just have to live with some short-comings within the technolgies.
Thanks again. All your comments were greatly appreciated.
Rusty