Dwell Question

[mkaake]

I was wondering if there's any way to program dwell in revolutions rather than in time - i.e. if I use a G04, can I say 2 revolutions of dwell, rather than having to compute how many seconds 2 revolutions of dwell is?

Thanks -

p.s. I'm using a Fanuc 16M...

[Switcher]

I run siemens 840D (don't know about Fanuc) in 840D you can do this.

DWELL: G04 S10 causes a dwell for 10 revolutions of the spindle.



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[mkaake]

Thanks, I'll give that a shot...

[jackson]

Yeah i think you can use the S like switcher said on a fanuc, if not try G99 feed per rotation mode.

[mkaake]

Tried the S - the controller didn't like it. I'd give the G99 a shot, but the ATC jammed up in the middle of a tool change, so I'm down and out for the rest of the afternoon...

[jackson]

Sounds like you need a BIGGER HAMMER

[mkaake]

Originally Posted by jackson Sounds like you need a BIGGER HAMMER

lol - there are times when I wish I could...

[jackson]

Originally Posted by mkaake lol - there are times when I wish I could...

DONT WE ALL!!!!!!! LOL

[Mark L. MN]

Check the manuals (if available) for the dwelling cycles. I know for Fanuc the G04 only sets the rotation & the "S" value sets the RPM. Look for a "P" or "D" value that sets a time. That or a count of rotations might work with a subroutine.

[jackson]

Originally Posted by Mark L. MN Check the manuals (if available) for the dwelling cycles. I know for Fanuc the G04 only sets the rotation & the "S" value sets the RPM. Look for a "P" or "D" value that sets a time. That or a count of rotations might work with a subroutine.

Fanuc (at least the newer ones) use G4 X,P, or U

[gar]

070328-1641 EST USA

mkaake:

Are you implying that you do not want the use a subroutine to calculate time from speed? Or do you lack math capability in your control?

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[dcoupar]

If you have the Macro B option, you could use a macro to calculate the time required for n rev's based on current RPM.