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here's a clue. Compare this to the 60 Hertz data. there's only one way you can get 120Hz at 72 amps.

all I can say is I understand because I didn't get it at first either. maybe because you're stuck on this 60 Hertz base setting.

I'm not sure about all that. But I had my eureka moment. The motor actually is 30hp at 60hz. But since it's constant torque variable horsepower up to the base speed (120hz in this case) the motors...

You may be right on the 120hz base Eldon_Joh. My 240hz base would only achieve the 30hp at 120hz operating frequency if I understand correctly.

Your specs say foot mount but this is definitely a face mount motor.

The only way you can change the voltage of this motor is to lift the winding.

Like I said three wires in the pecker head.

Another note: The 220V motor is a 30hp but the 480V drive is 60hp to be able to supply the current the lower voltage winding is expecting.

Here is the motor tag. The motor is wired 220 with 3 wires coming out (no high volt option).

The motor is allowed to run up to 120hz and the VFD is set to 240hz base speed to achieve the proper V...

This is on a 5 axis Cincinnati profiler. It has been running this way 4 years I know of.

What do you think the VFD does with this setting?

The VFD is definitely on 480 and the motor is wired 220. No smoke the VFD limits the current to the motor rating. The power is just PWM'ed from a highet DC bus voltage. Thats where inverter duty...

This is the second time I have encounter this application and both times I have been told it doubles the horsepower of the motor. Does anyone know the theory behind this?

I am from the old school...

I think I have narrowed my problem down to the A board. After pricing them I started stripping the control off. The Fanuc 5's have a certain charm, but I think there useful life is coming to a end,...

Jeff,

You could try holding the RESET button while turning on the control. This clears all the parameters.

The display on your panel does not look good. You should be able to curser through...

I have a Fanuc 5M on a Mazak Micro Center. When I turn the NC on the contactors (MCC) in the drives click for a 1/2 a second then turn off. I have no alarms on the board LED's or Display (MDI/DPL...

Differential noise immunity is based on common mode rejection. The reciever can only detect a difference in the SIGNAL and [U]SIGNAL[U]. If the same noise appears on both lines it is rejected. There...

No doubt when selected post are deleted!



I really don't think the competition is worried (my opinion).

Darek

Here is another helper

http://www.cnczone.com/forums/attachment.php?attachmentid=62880&d=1215725875

Darek

Here is the drive schematic. There are no negative power supplies used.

http://www.cnczone.com/forums/attachment.php?attachmentid=35475&d=1176638444

I would check your fuse 14 and compare its...

If you are measuring across the junction what you are seeing is forward and reverse bias. If you make your base V reading with your black lead on ground you will see the voltage never goes negative....

I encountered the index latching while servo orienting a spindle, which had to be done for each tool change. The only way I found to unlatch it was to give a small position command.

' servo...

Boy you are right there! Some of the old parafin based way oil if left idle would turn to wax!

There is a filter element and screens at the bottum of the pump you should replace also.

Darek

Here is another.

http://www.devcocorp.com/american/bijurmeters.htm

The Bijur are about $20 and they have an aftermarket part for about $17.

Darek

With the CL system there is one PIC chip and 4 output transistors per axis. You can get the transistors from any electronics supplier but the PIC chip would have to come preprogrammed from MaxNC.
...

In order to reuse your existing drives you will have to provide them a tach signal. This can either be done with an external F/V converter, like the mother board had or a tach on the motor.

The...

I'm not saying it can't be done, I would love to see the code to do it.

What I am saying "by the time you get it working right you will wish you had used a PLC instead". That is based on my...

These type of toolhangers require the tool changer to do operations while the CNC is preforming motion to save time. For instance they usually prestage tools with a T# call with no M6. It would seem...

It would help to know a few things:

1. Are your servos analog controlled (+/-10v) slaved by the Galil, or are they digital (Step and Direction) with seperate inputs or do they share the same...

I know what you mean. I am spoiled on other CNC controls. No need to putz around with NEXTMOVE and BLEND values to get smooth block to block operation.

Darek

Well that seems to be straight from the Website. One thing about that spill that always hit me as a oxymoron

?????"I am an experienced retrofitter but do no know ladder logic"?????

Darek

I found Camsofts implimentation of G64 (Constant Velocity) to be cumbersome compared to other CNC controls. On most CNC controls the software will LOOKAHEAD in the G code and blend the moves together...