VERICUT Users' Forum

Shapoor

Member

Registered: 2010-08-18

Posts: 4

Spindle acceleration time on Lathe

Hello everyone, I was wondering how Vericut accounts for the time taken for the CNC Lathe spindle to accelerate & decelerate. Until the correct speed is achieved, the axis movements do not take place. On some of the older machines this could be as long as 3 seconds and depends on the change in RPM. For linear & rotary movements, there is the 'Accel / Decel' tab on the 'configure component', but no such provision is there for the spindle.
Since this time varies depending on the change in RPM, it can not be simply compensated by a dwell time macro.

Svante

Senior Member

From: Trollhättan, Sweden

Registered: 2005-02-23

Posts: 60

Re: Spindle acceleration time on Lathe

Hi,

Try with "DwellSeconds"-macro on the S-word. With ORV ( $ * 0.001) or something.
Then a rpm of for example 2000 will return a dwell of 2 seconds.

If I understood your question correctly?

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Svante Eriksson
System owner
GKN Aerospace Engine Systems Sweden
Vericut 7.2.1, 7.3.4, 7.4 - NX 9.0.3

DaveF

Senior Member

From: Valencia, CA

Registered: 2005-08-20

Posts: 304

Re: Spindle acceleration time on Lathe

When I programmed lathes, back in 1981, what I did was after a tool change, turn on the spindle with a direct RPM, close to the CSS of the 1st cut. Then I would turn on CSS. A little extra programming, switcing from G96 to G97 to G96. I was using compact II,  after a year of manual, and Compact II had an option to do that for me.

So I say, you can get rid of most of that dwell.
Dave

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Dave Frank
Aerospace Dynamics International, PCC
Valencia Ca
"Where else can you have this much fun,.......and get paid???."