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« on: February 12, 2018, 06:17:48 AM »
Hi,
there are dozens of different strategies for Mach to control a spindle. It depends on what sort of spindle you have and what sort of control you need.
The simplest control is to have Mach just turn in on or off, it could be as simple as a relay or a contactor for a bigger spindle or a Solid State Relay.
You could have the spindle go forward and reverse, if you need it, although I don't know anyone who has lefthanded cutters or drills, so it seems a bit pointless
to me unless your doing rigid tapping, and the fact that your asking tells me your not even close to the realm of rigid tapping!
Machs native speed control strategy is PWM. One output pin is turned on and off rapidly to emulate an analogue voltage which in turn controls a
DC power supply/amplifier for DC spindles or the analogue voltage input of a VFD for an AC spindle.
Another way is Step/Direction control not dissimilar to an axis motor. They are superbly accurate and often very powerful for rigid tapping an worth a FORTUNE!
To be honest a lot of people go overboard trying to control a spindle spending a lot of time and money on it when often they don't really need it, unless they
want to bragg (or toss off) about it. Start simple and work your way up to what you need, as opposed to what you want, assuming you not a bragger!
Craig