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Got a brand new PUMA 400 Lathe with the same thing. Sits on 18% at a dead stop.
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Does anyone else have this issue? When these were new they ran with one bar showing and it seems like a couple of our mills are showing 30% spindle load without doing any cutting. The spindle rotates easily by hand so I almost think the gauges are bad.
Got a brand new PUMA 400 Lathe with the same thing. Sits on 18% at a dead stop.
My Fadal also got 30% when doing nothing
I do not think, that that is a problem. Its yust meaning that the measuring device is relativ to friction(on 10 000 rpm with 1mm ballnose tool, is 5%).
Similar issue here.
Low speed spindle operation is HIGH load on the meter.
Increasing RPM will decrease load. With my 2speed spindle, 100RPM is like 100% load, and 2500 RPM is near 5%.
I have always assumed this was due to the original analog load meter and a replacement spindle drive not cooperating. Or, the analog load meter from a -2 system with a -5 brain.
The meter is pretty inaccurate for a baseline load, but can show a relative shift. Not nearly as useful as it could be.
I wonder if a new meter is in order. Even our digital meter is showing 2 bars when the machine is running on another 3016. Is it possible the spindle motors could be wearing out?
Not sure if it is the display or what, $350 for a new display isn't all that tempting when I don't know if it is the problem or not.
I should also add that the motor is not that heavily loaded. My new spindle drive has a handy-dandy display showing V,A,Hz. It's not running hard at all, just the oppositie of the load meter's reading.
We are probly dealing with faulty worn out analog metersOriginally Posted by Shizzlemah
if the machine hs an older spindal inverter AMC the meter would show a load when the drive was starting to fail
If it was my machine I would confirm the load via a tong test meter. There could be a problem with drive belts??.
On a Posi unit the belts crunch and wont effect load. The spindle turn easily with the motor and at higher RPM's the load goes down. Its a very strange situation and I wouldnt rule out anything yet...even belts.
On my machine, belts are nearly new, maybe 100 hrs cut time on them.
If I get some downtime this weekend, I'll run a little test and report spindle load meter reading versus spindle drive readings for I/V/Hz.
Then, um, maybe I'll have to call Neal :-)
I had a bad analog meter. It would sit around 30% all the time unless I tapped on it, then it would show a better reading. I replaced it with the digital meter. I think the analog was around $300 and the digital was around $75.00. It was a no brainer. I still have the old one if anyone want's it.
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