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Author Topic: RPM variation with G76 cycle use  (Read 461 times)

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RPM variation with G76 cycle use
« on: February 03, 2019, 04:04:50 PM »
Hello
I noticed a particularity when using the G76 thread cycle.
Give an example
I do a thread at 800 RPM,
and then following various problems I decided to change the number of shifts from 800 to 400, I noticed that Mach4 no longer takes the correct step, so as to ruin the first cycle of passage.
is this condition for you too, or do I have the wrong settings?
I ask, because when I tried Mach3 Turn before using Mach4 Lathe, it seemed more stable in the thread, even though I changed the number of revolutions while running the loop did not ruin the thread.
this is the link to the video of when I tried Mach3 Turn threading and sync

https://www.youtube.com/watch?v=sZn3no2siA4

thank you in advance for any reply!
« Last Edit: February 03, 2019, 04:07:32 PM by daniba73 »

Offline RICH

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Re: RPM variation with G76 cycle use
« Reply #1 on: February 04, 2019, 08:33:19 AM »
Have a good reading / study of Threading On the Lathe Mach3 write up which can be found in members doc's.

Can't be of any help relative to Mach 4.

RICH
Re: RPM variation with G76 cycle use
« Reply #2 on: February 04, 2019, 03:49:25 PM »
it was just an example, to figure out if I have wrong settings on Mach4, or has very specific rules.
what seems strange to me is that if I make several empty cycles without giving any increase, the thread is slowly ruining.
this did not happen with the tests done with Mach3.
Am I wrong or is it Mach4?
I asked just to compare the results with other users.