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I understand the front thrust bearing (2 back to back) arrangement, and that the rear (roller cage bearing) driven end (allowing expansion) floats, but it should not grow. I just don't see where the...

Yes, I have experienced this as well at very slow feeds. I have the same machine. It was a couple years ago and have not seen it since. And yes,it did it on the FINAL PASS of course. Did you figure...

My Boss8 series II has developed Y axis zero problems that started to became detectable
about 3 years ago.

First of all the Y ballscrew was rebuilt about 10 years ago, however usage has been ...

Have you tried swapping the Y axis drive amp with either the X, or the Z, and note any change, if any?
This will at least locate, or rule out a problem with the drive amp section. Its an easy place...

The latest is: I swapped the X and Y amps, and all seems fine!? At this point I'll guess it may have been reseating the NC400's that did it? I have not done this for 7 or 8 years. Thanks for your...

Although I would still like to see a "cheat sheet on drive tuning." I have come across the Contraves NC400 series controllers, PDF covering the mdl 407, 414, and 421. I believe this has been recently...

RE: i have to find my cheat sheet on drive tuning.

George, if you find your drive tuning notes, I would sure like to see them. Thanks for your thoughts.

Greco systems makes or made a cool stand alone unit the size of a lunch box. it accepts floppy disks. It can download and DNC drip feed to most cnc machines. The units I've used have RS232 and...

I have some Boss5 Series II boards for sale, (I don't know the dif between Ser I and Ser II boards?) $175 each, if I have it.

I'm using Contraves NC-400 drives all stock, and I probably will try the amp swap rather than switching servo motors. I believe the servo motors to be good, as I want thru them 10 years ago and...

The machine is a R2E3 Boss8 Series II, with SEM servo motors, and Heidenhain ER-120 encoders stock.

This only concerns the Y axis. I realize now this problem started a couple years of years when...

Have you ruled out settings in your software? Or tried a completely different program to generate code, ruling out a software issue? Since the problem does not appear in single axis movement of x or...

After putting more spaces between LineCode and # Linear move, output seemed to be correct, but have not yet had time to test consistency but, things look good so far.

...

Jason, its "SO CLOSE" to being perfect! The only problem is a G99 appearing on G1 Z moves. (For whatever reason this sends the spindle down to crash?)

How close would the following be to a fix:...

Hello Jason, The following files are the output produced and the post you sent me. Line #'s are gone but the G99 command appears on a separate line by itself, not after a G1, G2, or G3 as is needed....

Jason, here is a copy of the post I'm trying to edit:

name Bridgeport BOSS 8

% 00
: 5
N >4
V 0
G >2
g >2 G

Jason, thanks for the reply. I tried the "Sequence#s N 0 5 5" (and "Sequence#s N 0 0 0") and the result is "N0" at the beginning of every line. I will be trying your G99 implementation in the next...

Clarke, Machintek hit the nail on the head. The beauty of DNC is who cares how big the file is, no worries! And may I ask how you know you have only 2k memory? I thought all R2E3's had about 11K. My...

Does anyone know how to remove line numbers from the Surfcam 2002 post output? I tried playing with the "Sequence#s N 5 5 5" line in the postform.m file with no luck. Can anyone please help?

PS...

Try this: Remove the axis servo drive belt cover. Do the home procedure, when that axis errors mark the pulley to belt relationship using a paint pen. (sometimes after a fault shutdown occurs a...

If there is no light source when you remove the encoder cover, make sure you are getting power to the lamp, which will confirm a burnt light source. Otherwise check your damaged connector. I have...

Does X travel at the normal slow speed when it shuts down when homing, or does the X move at a rapid move speed. If its a rapid for a short distance then shuts off the drives, you may have a...

I believe the green LED on the EAF board should be blinking on and off, indicating it is communicating with the FMDC. If the LED is on, but not blinking, it means you have power to the EAF. but...

Toad, I believe the open socket is OK. There are other boards in the R2E3 that are missing IC's. This probably left options open for design engineers during development and or future improvements or...

This condition sometimes made money for Bridgeport Repairmen, as Keith at VERSITECH told me, over the phone, when I encountered this problem.

Does anybody else think JohnnyTurn may have misspelled his last name??
After all, this forum is to help each other, right?

PS R2D2 is a Star Wars character, not a Bridgeport control (even...

Trace the wire(s) involved, they will be connected to a plug connecting to the EAF. Then If you don't have a schematic, use an ohm meter to trace between the known connector pin and the involved...

A simple DNC program will allow virtually unlimited file size to be used. The largest file I've needed to run was about 8 MEG.

Be aware that some older 3 phase services provide what is called "Grounded Hot Leg," which can be trouble if you don't know you have it. Do a google search to learn more.

It sounds like a problem with the cable, broken, shorted, or not properly connected.
The displayed "F" when loading to the machine sounds fine. The immediate error following sounds like you could...