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Author Topic: Spindle DRO not working in Mach3 Turn  (Read 8724 times)

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Offline MHJ

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Spindle DRO not working in Mach3 Turn
« on: August 23, 2010, 09:31:12 AM »
Hello !
 Mach3 Turn R3.042.040 licenced. Homann Digispeed, Emerson Commander SK VFD. Homann MB02 V6 BOBs.
.375" slot on 7.5" disc
Spindle motor output checked
PWM checked
PWM base frequency 1000
Min PWM 0
Spindle speed averaging checked
Index enabled on port 1 pin 15, active high.
Voltage output from opto with slot at the sensor is 4.92v

At any speed above 100, the Spindle true DRO shows either 13 or 14, below that it shows 0. I've tried the Index debounce at many values between 0 and 1000, to no avail. Can anyone please tell me what's going on here, before I go raving mad? (or madder, some would say).
Regards,
John

Offline Hood

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Re: Spindle DRO not working in Mach3 Turn
« Reply #1 on: August 23, 2010, 01:25:20 PM »
Are you commanding a M3/M4 ?
Try enabling the spindle relays even if they are to imaginary outputs.

Hood

Offline MHJ

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Re: Spindle DRO not working in Mach3 Turn
« Reply #2 on: August 23, 2010, 03:56:51 PM »
Hood, thanks for taking the time to reply,
Spindle relay IS in place, to the Homann Digispeed, as follows:
Enable port 2 pin 17
Output 1 to relay on Digispeed port 2, pin 16 (cw)
Typing M3 S100 in the MDI box turns on the VFD and I have 100 rpm at the spindle. Pressing the spindle start button with 100 entered in the speed select box has exactly the same result. (other speeds selected give different results at the spindle, but that's another issue)
Over the last 2 days I've tried moving the spindle index pin to other inputs (on both bobs), with exactly the same result..... no or innacurate spindle true DRO.
Regards,
Baffled, UK.

Offline Hood

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Re: Spindle DRO not working in Mach3 Turn
« Reply #3 on: August 23, 2010, 04:25:45 PM »
Can you attach your xml and I will see if I can find a problem.

Hood

Offline RICH

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Re: Spindle DRO not working in Mach3 Turn
« Reply #4 on: August 23, 2010, 05:24:06 PM »
I will remark that you should set rpm  at a desired / fixed rpm manualy when threading.
The PWM will cause problems as it fights Mach Turns ability to vary the feedrate with a change in rpm.

RICH

Offline MHJ

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Re: Spindle DRO not working in Mach3 Turn
« Reply #5 on: August 24, 2010, 09:52:32 AM »
Hello Hood.

XML attached.

Since I last posted I have re-installed Mach3 and sorted the speed bother I was having, but the Spindle true problem remains.

Rich,
yes I've read your threading guide, a nice bit of work if I might say so, hope you got well paid for it. Also that there will soon be a revision of Mach3 for us lowly 2 axis folk, do you have any idea when that might be?

Regards,
John.

Offline Hood

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Re: Spindle DRO not working in Mach3 Turn
« Reply #6 on: August 24, 2010, 10:01:43 AM »
Also that there will soon be a revision of Mach3 for us lowly 2 axis folk, do you have any idea when that might be?

Regards,
John.

Some time in the next few months I was told by Brian, only prob was that was well over a year ago so looks like the start of the "next few months" period has not started yet ;D
Hood

Offline Hood

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Re: Spindle DRO not working in Mach3 Turn
« Reply #7 on: August 24, 2010, 10:22:36 AM »
Seems to be fine as far as I can see, is there any way you can scope the input to the port from the index to see if its getting through the BOB ok?

Hood

Offline MHJ

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Re: Spindle DRO not working in Mach3 Turn
« Reply #8 on: August 24, 2010, 10:52:22 AM »
I regret that I have no scope, but I do know that 4.92v is getting from the index to the bob and I can see the led on the bob flashing in sync with the disc rotating....at low revs of course.
In the meantime, thanks for looking at the XML, it's appreciated.
I'll see if I can borrow a scope, together with somebody to drive it !
Regards,
John.

Offline Hood

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Re: Spindle DRO not working in Mach3 Turn
« Reply #9 on: August 24, 2010, 11:05:18 AM »
Do you see the index pulse LED on the diags page when going slow?

Hood