On Tue, Jun 16, 2009 at 5:03 PM, Andy Pugh <a...@andypugh.fsnet.co.uk>wrote:

> 2009/6/16 Leslie Newell <les.new...@fastmail.co.uk>:
> >
> > I am retrofitting a lathe that has a 3-speed electrically controlled
> > gearbox. The gear change sequencing will be controlled by ClassicLadder.
> > Basically ClassicLadder has 3 HAL pins set up, one to select each gear.
> >  Is there any easy way that an appropriate gear can be selected by
> G-code?
>
> Can it change gear during a cut? You might want to consider what
> happens in constant-surface-speed mode.
>
I have not considered that as I do not have a lathe. If the control can tell
the component it is in the CSS mode then the component could be modified to
allow speed moves beyond the discreet gear range steps without changing
gears. As it is, the component stops the spindle, changes the gear and then
starts the spindle.
Stuart

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