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Author Topic: G00 to G00 rapid block overlap (corner rounding)?  (Read 639 times)

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G00 to G00 rapid block overlap (corner rounding)?
« on: December 26, 2017, 11:55:12 AM »
Is their a parameter equivalent to the fanuc 1722 (overlap for consecutive G00 blocks) in Mach4?  This would, for example, start the acceleration of the x axis when the z-axis has reached a certain deceleration point, essentially rounding corners.  I have over 60,000 holes to drill in 150 parts, and this time savings can really add up.  Right now it looks like in a drill cycle when the z retracts it will decel to zero before x/y moves start.  Are these moves controlled by the trajectory planner or is that only for feed moves?
I may have to post this out in longhand G1 moves at max feedrate to make it work.
Re: G00 to G00 rapid block overlap (corner rounding)?
« Reply #1 on: December 27, 2017, 08:51:20 AM »
In case anyone is interested, I ended up posting out both ways for comparison.  Same parameters for both
.062" drill
retract plane .227"
feed plane .197"
drill depth .13"
20ipm @ 20,000rpm
The simple G81 code takes 5minutes 30 seconds to drill the 422 holes in one part.
for the longhand version I turned off the canned cycle in mastercam and reposted the code.  I then converted all the G0 to G1 @ F200., and had to add a line at every hole to make sure it was retracting to the retract plane and not feed plane.
I ran the cv feedrate wizard and changed the max angle to 105
The longhand run time is 3minutes 45 seconds, a savings of over 4 hours at 150 parts.  This was a lot of work though, it would be great if there was a parameter to turn this feature on for rapid moves.
Re: G00 to G00 rapid block overlap (corner rounding)?
« Reply #2 on: January 01, 2018, 12:37:35 AM »
I uploaded a video of the operation which I would say was a success.
Would sure like to see this added as a feature to mach.

https://youtu.be/kbdbChisIdA