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Author Topic: lathe RPM on DRO  (Read 2516 times)

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Offline ozzey

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lathe RPM on DRO
« on: January 27, 2015, 02:49:34 AM »
I have my lathe working but the spindle rpm is different from the DRO its manual on off i just need the spindle rpm set for threading

Offline Hood

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Re: lathe RPM on DRO
« Reply #1 on: January 27, 2015, 02:18:00 PM »
Have you set up Spindle Pulleys correctly? You need the Max RPM of your spindle set there.
Hood

Offline Hood

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Re: lathe RPM on DRO
« Reply #2 on: January 27, 2015, 02:21:41 PM »
You will also need to enable the spindle relays, even if you dont use them, just set an output up that you are not using and enable it. You will also need to have a M3 call in your code or press the Spindle button before you will get a RPM readout.
All of the above is when using the parallel port, if using an external controller then usually these steps are not required.
Hood

Offline ozzey

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Re: lathe RPM on DRO
« Reply #3 on: January 27, 2015, 02:37:04 PM »
i set spinle speed to max rpm 1050 even when its stoped its reeds 125 rpm i have one cut out in timeing disk on spindle sharft useing a cnc 4pc sencer

Offline Hood

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Re: lathe RPM on DRO
« Reply #4 on: January 27, 2015, 02:41:51 PM »
Have you set the Spindle Relays like I said and also are you calling a M3  and then when finished a M5?
Hood

Offline ozzey

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Re: lathe RPM on DRO
« Reply #5 on: January 27, 2015, 02:52:06 PM »
i juat got out of bed hood will try that soon

Offline Hood

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Re: lathe RPM on DRO
« Reply #6 on: January 27, 2015, 02:57:08 PM »
One other thing to look at is the Index Debounce, I always found Zero was best but I used a different sensor. I have heard people that use the CNC4PC sensor require more than zero but dont go too high or you will get unreliable readings, especially as it spins faster.
Hood

Offline ozzey

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Re: lathe RPM on DRO
« Reply #7 on: January 27, 2015, 04:10:13 PM »
the only thing that makes a difference is pully settings but i have a 120 mm disk of aluminum with one 6 mm slot is that ok it stil reeds 226 rpm at spindle stoped do i need multy slot disk

Offline Hood

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Re: lathe RPM on DRO
« Reply #8 on: January 27, 2015, 04:41:44 PM »
Are you calling  a M5? The way Mach now works (with the parallelport) is it needs to know the spindle has started, so you need to call an M3, likelwise it needs to know the spindle has stopped and thus you need a M5. Alternatively pressing the screen button for Spindle On/Off will do.

Also if you have averaging on in Ports and Pins, Spindle Setup, it may be a bit slower to respond to the speed. It will not affect threading as that is read directly in the driver, its just the DRO.
Hood