Spindle speed slows down

[carlboe]

Today my PCNC1100 started to slow down and speed up maybe 300 to 500 rpms. So I thought I would check the VDR and it showed 56.5. I then check the manual and it said it should be at 137.0 at 500rpms. So I went to the Cal. info. in the manual. Did that and now NO spindle speed. I can manually start and stop the spindle. What did I do wrong?. Now went I try to do it I get a message that says Magic number invalid.

Thanks

Carl Boe.

PS. I'm a machinist not a computer guy so please be kind.

[VaderSpade]

Mine has done that, a reboot straightens it out.

I was told there was a couple reasons neither of which were the cause of my problem. One was double clicking on “start program” button, and the other was using “start from here” wrong.

Is this a series 3 machine?

[carlboe]

No it is a series 2. What do you mean reboot? install every thing again?

Carl Boe.

[VaderSpade]

No just turn the computer off for a min and start it again. It may or may not help but it's easy enough.

[carlboe]

I did that a time or two all ready. What about the invalid magic number?

Carl

[philbur]

You are not doing what is written:

Set the speed to 500rpm with the belt on the low range. VFD should read 35 Hz. Record what the number actually is and enter it in correct box on the "Speed Calibration" page as per the instructions.

Phil

Today my PCNC1100 started to slow down and speed up maybe 300 to 500 rpms. So I thought I would check the VDR and it showed 56.5. I then check the manual and it said it should be at 137.0 at 500rpms. So I went to the Cal. info. in the manual. Did that and now NO spindle speed. I can manually start and stop the spindle. What did I do wrong?. Now went I try to do it I get a message that says Magic number invalid.

Thanks

Carl Boe.

PS. I'm a machinist not a computer guy so please be kind.

[carlboe]

Phil

That was what I was doing when the problem started. Tried it again today same thing. I set the rpms at 500 VFR said 56.5. So I followed the 9.10 in the Manual enter PCNC config and selected the open profile selected the profile and entered 56.5 hit save and done. Opened control software and started the spindle and no speed.

Carl

[philbur]

How are you measuring the 500 rpm for the spindle speed.

56.5 Hz sounds high for 500 rpm with the belt on the low range.

Phil

[carlboe]

Phil

I typed the speed in on the S DRO tech. says 523 rpms.
Thanks

Carl Boe.

[carlboe]

Phil

The belt is in the low range

Carl Boe

[dbrija]

Phil

The belt is in the low range

Carl Boe

Make sure you changed the active pulley in Mach3. I have forgotten that, and I get that 56MHz number.

BTW, it does not matter if you physically move the belt or not. What matters is the VFD reading when in mach you make low range the active pulley and issue an M3 S500. Should be ~35-37 MHz.

[carlboe]

dbrija

The spindle will not start I have to start it manually. You are right about the belt placement. I can run a program but I have to start the spindle manually. Before I hit cycle start.

Thanks

Carl Boe.