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Author Topic: No VFD voltage...  (Read 26331 times)

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Offline H2

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Re: No VFD voltage...
« Reply #30 on: February 12, 2009, 12:06:31 PM »
Ray, I believe your first hunch is correct on the DC controller.

I have 2 pictures below from the manual.  I hooked the 10Vdc signal from the board to the minarik but ... no spindle yet.

I appreciate your help -
All the best, Henry


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BClemens

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Re: No VFD voltage...
« Reply #31 on: February 12, 2009, 12:16:02 PM »
So you were able to read and adjust a 10 volt signal from the combo-board?

Bill Clemens

(don't mind me, I'm stuck in the E B welding shop while a 27000 lb magnet is hoisted to be turned over...)
« Last Edit: February 12, 2009, 12:20:11 PM by BClemens »
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Offline H2

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Re: No VFD voltage...
« Reply #32 on: February 12, 2009, 12:34:26 PM »
Bill, Yes -  I read the 10Vdc at the screws and using TP 1&2 - misprint in the manual...

If I adjust the spindle speed in Mach3 I get
1800 rpm - around 9Vdc
1000 rpm - 5Vdc

Still getting nothing out of the minarik board....

All the best, Henry
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Offline HimyKabibble

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Re: No VFD voltage...
« Reply #33 on: February 12, 2009, 12:46:46 PM »
Quote from: H2 on February 12, 2009, 12:34:26 PM
Bill, Yes -  I read the 10Vdc at the screws and using TP 1&2 - misprint in the manual...

If I adjust the spindle speed in Mach3 I get
1800 rpm - around 9Vdc
1000 rpm - 5Vdc

Still getting nothing out of the minarik board....

All the best, Henry


Henry,

Sounds like your interface board is working as it should.  Does the Minarik work when you hook up a potentiometer?

Regards,
Ray L.
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Regards,
Ray L.

Offline H2

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Re: No VFD voltage...
« Reply #34 on: February 12, 2009, 01:01:34 PM »
Ray - no it does not run with a potentiometer.

I found another relay buried in the box.  It has main power and hooks to the minarik board.  I "think" it needs to be energized and not sure from where or how... even if it needs to be there?  could the relay off the BOB do the job? 

It is a Dayton 2A545E, and the info on the relay
 20amp 28Vdc
 1 1/2 hp, 20 amp, 240VAC
 3/4 hp, 20 FLA, 240 VAC
 83LRA, 20FLA, 240VAC

Any thoughts?  I think I just stepped into the deep end ;-)

All the best, Henry
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BClemens

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Re: No VFD voltage...
« Reply #35 on: February 12, 2009, 01:54:38 PM »
You could put 28 volts through the motor start relay on the BOB to energize the main motor relay...izat (some new English) what you mean?

Bill Clemens
« Last Edit: February 12, 2009, 01:56:14 PM by BClemens »
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Offline H2

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Re: No VFD voltage...
« Reply #36 on: February 12, 2009, 02:00:01 PM »
Bill /Ray

I have a pic of the current way the relay is wired if it helps...

I "assume" the old power board is my trouble nothing now to tell the relay to trip...  I "assume" I need to get the BOB to tell the relay to trip?

Not sure I understand how to get the BOB to put out 28Vdc?... neophyte here...

Ideas?  All the best, Henry

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BClemens

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Re: No VFD voltage...
« Reply #37 on: February 12, 2009, 02:29:44 PM »
See if Ray agrees, but looks like you would need a double pole motor start relay on the AC lines in to the PWM board. I'm not following the relay hook-ups to the output DC motor terminals... That would appear to be a disconnect from the board to the motor but the motor is still hooked up to the same terminals?? Not sure what they were doing there.

You would need to match a relay to a DC voltage on the BOB such as the 12V supply on the Combo-Board. Use that to power a 12V motor start relay with contacts heavy enough to run the motor - maybe 20 Amps or so. There is documentation on that in the BOB Guide.

Bill Clemens

Checked that relay out and it is 24 volt and heavy enough to supply the motor. You would need to get a 24V wall wart to energise it through the motor start relay on the BOB.
« Last Edit: February 12, 2009, 02:37:31 PM by BClemens »
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Offline HimyKabibble

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Re: No VFD voltage...
« Reply #38 on: February 12, 2009, 05:18:57 PM »
Bill,

I'm afraid I completely don't understand what you're trying to do with the relay.  If the relay is supposed to energize the Minarik board, then it needs to be switching the "Hot" leg (black wire) of the AC input to the Minarik board.  You appear to have it connected to both the motor terminals and one AC terminal, which is wrong.  If you connect the motor to the Minarik, and connect the AC line directly to the Minarik, put the jumper in the "manual" position, with the potentiometer installed, the motor should spin.  If it doesn't, then I'm afriad your Minarik is toast.

Regards,
Ray L.
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Regards,
Ray L.

Offline H2

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Re: No VFD voltage...
« Reply #39 on: February 12, 2009, 05:26:42 PM »
Ray - Understood.  The diagram is how it is wired now - as odd as it seems the diagram is how the spindle was wired prior to the retrofit and was working well.

I am doing some thinking and will post back with findings.  My head hurts ;-)

Appreciate all the help, All the best, Henry
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