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Old Feb 22, 2015, 10:00 AM
megclay is offline
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Prolight 2000 WinMe and motor speed control

Hi Rob and Others
I want to get Win-Me working for the PROLIGHT instead of DOS
do you run from a desktop shortcut
and what setting do you have been along time ago (15 years)
Thanks

also
everything is working good with the prolight
I found out why I have a loss of power under load
after I called intelitek and minarik (PCM21000A the speed control board)
DC motor magnets get weaker from use and time
also speed control needed adjustment there is 5 pots on the board
tested the volts from motor wires when running max speed
adjusted the SIG ADJ and IR COMP
it works almost as it should

SIG ADJ is max speed volts (Was 10v low adjusted to 90V)
MIN SPD only works in manual mode (Did not adjust)
MAX SPD only works in manual mode (Did not adjust)
TORQUE or current limit factory set at 120% of maximum drive current (Did not adjust)
IR COMP to maintain set speed as the load changes (adjusted THIS WAS IT now works)

and the motor pulleys are stock 40G motor - 30G spindle the belt 70G pitch .200" XL (they measure grooves)
ordered new motor pulley 36G and belt from SDP 5400 to 4800 RPM
I will have to adjust the speed file in PLM2000 folder (SPINDLE.MAP).
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Last edited by megclay; Feb 22, 2015 at 11:05 AM.
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Old Feb 23, 2015, 12:28 PM
Roto Rob is offline
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Megclay, your ME settings are the same as mine. It has worked out fine for me. The test of the memory management is to load a really large NC file. I have loaded 35,000 lines without splitting. Another RcGroups member reminded me to check the brushes on my motor, and servo's. Haven't got to it yet.
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Old Feb 23, 2015, 01:42 PM
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Thanks Rob
I will try the large file trick
I ordered new brushes and installed them
my old ones are still new
maybe .02 shorter
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Old Jun 04, 2015, 12:58 PM
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Spindle Bearings

I joined this forum, after finding all the great information that Roto Rob has posted about his ProLight CNC machine rebuilding. I have a very similar
Benchman VMC 4000, with the 10,000 RPM spindle, that gets quite a lot of use.
I thought I'd share some of my experiences here, as Rob did, to further help others with these machines.
I guess it's true that Light Machines put what I'd call "hardware store bearings" into the spindles of these little machines. Mine was noisy when I bought it, and being a machinist, assumed it had the wrong bearings in it when I found deep groove 6206 bearings in there. I did my homework, and came up with a suitable upgrade to use a real Angular contact sealed, light grease, spindle bearing.
What I chose was Barden 206HERRUM G-75. This is a 25 deg angular contact,
P2 Precision, non-contact sealed both sides bearing that's already packed with suitable quantity/quality grease for a high RPM spindle. My machine has the air powered drawbar release, and these bearings really stiffened up the spindle from axial deflection when the power drawbar was activated. The bearings also nicely improved the quality of machining as well. I did however regrind the R-8 spindle taper after doing the bearings. I'm using this with the Tormach TTS quick change tool holders, and their balanced R-8 collet, and am having no problems with long hours of machining, at 6-8000 RPM. Without the balanced collet, there would always be a vibration above 6500 RPM, but using Tormachs collet, with a key slot on each side completely solved that issue.

I was able to find my Barden bearings NOS, and at a reasonable price, but there are a few other upgrade options. ...Nachi has a 6206-2NK CM P4
This is a deep groove electric motor bearing that's designed to run with a little axial preload. It's a P-4 precision as well. Overall a pretty well suited bearing...maybe other manufactures have a suitable cross-over as well.
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Last edited by Darcy R; Jun 04, 2015 at 01:06 PM.
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Old Jun 04, 2015, 05:35 PM
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Thanks, for the bearing information. How was the spindle taper ground, did you do that on the mill. I touched mine up using one of my knife sharpening stones, held at an angle in the vise. Being kind of a caveman approach, I didn't remove much, just enough to get a reasonable surface.
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Old Jun 04, 2015, 10:46 PM
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Rob, I used an NSK jig grinder mounted to the table, and used a hand written G code to stroke , and feed. It seemed to work really well.
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Old Jun 05, 2015, 03:52 AM
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I sold my jig grinder, and have missed it.

I was sent some information on the Animatics controller. Looks to be a standard industrial controller, and could probably be easily replaced with a modern one. That way the rest of the electronics could be kept. Not sure what to make of all the info, or the terminal program to directly access the controller, but I posted it incase anyone wants to make use of it.
Also, found some schematic images online. Not the best quality though.
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Last edited by Roto Rob; Jun 05, 2015 at 04:05 AM.
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