Re: sherline motor/speed control wiring IT WORKS!

hey Ballendo
thanks! I have the relay setup to be off unless turned on. If the
parrallel port disconnects or the power to my stepper board is turned
off the spindle shuts off. However I do have a override switch case I
don't feel like booting up the computer for a quick cut. I also have
put a wide angle yellow LED to tell me when the motor is turing
on/off and also have a red 110v light to tell me the mill is on as a
whole (connected right to L1 and L2 on the speed control). I think
this is one thing sherline should add as I found myself leaving the
machine on with the potentiometer at low so it seemed as it was
off...now I know. One thing I have noticed is on boot up, no matter
what the I/O says on CNCPro the motor is on. I think this might be a
cncpro problem but am unsure. I have to cycle the I/O to turn it off.
I have made a quick start up and shut down procedure that I follow to
reduce any risks to my computer, stepper board and mill. I also, keep
the mill off when not in use and especially when changing endmill
etc. Thanks for the concern!
tauseef

--- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:
> Tauseef,
>
> Nice to see you making such good progress.
>
> Please keep in mind the term "Fail Safe". In this case it means,
what
> happens when something you didn't expect to happen...HAPPENS??
>
> Like the computer connection being broken; Does it turn the spindle
> ON or OFF??? Pretty important that you don't set yourself or
someone
> else up for injury.
>
> Most TTL outputs (like the p-port ctrl lines CncPRO uses for M
codes)
> will "float" HI if left to do what comes naturally. But check out
> what is happening with YOUR computer and YOUR driver board!
> Then "fail" the setup to see what happens... Be careful not to blow
> your drivers in the process!
>
> Also, find out what happens when the CNC software is NOT loaded and
> the computer is turned on with the machine and Driver board hooked
up
> and turned on. This will be simulating someone turning on the
> computer, who doesn't realise there's a cnc machine instead of a
> printer attached...
>
> Also remember that a circuit can be completed by supplying a source
> of voltage/current OR by supplying a ground...
>
> Hope this helps.
>
> Ballendo
>
>
> --- In CAD_CAM_EDM_DRO@y..., "tauseef" <alieron@h...> wrote:
> > Hey guys, more news! I got an LED to turn on and off using M03
and
> > M05 command on CNCPro! Connect a wire on pin 1 (+) and then I
used
> > ground off of the camtronics board (this should work for others
> too).
> > Check the voltage output and see if it goes up and to basically 0
> by
> > pressing F5 (this turns on this I/O). On mine is a little under 5
> > volts. Connect your device between the two wires and it will turn
> on
> > and off on command! Works so far! Tomorrow I will get a solid
state
> > relay and hook it up to the I1 and I2 on the sherline speed
> > control....Well let you guys know if it works tomorrow!!! Can't
> wait!
> > tauseef