Newbie- Need Help With Non Functioning Rapid Travel

[Todd H]

Hi all,

First time posting here. I have a Mitek mill with a fagor 8025 controller and Glentek brush type servo drives. When drilling with the Z axis, drill load was too high causing a following error and subsiquently the machine stopped. This has happened on ocation before, and simply hitting the E-stop and starting over was all that was necessary. This time, after restarting the Rapid override doesn't work when using the axis control buttons in Jog mode.

I bought this machine used a few years ago, and haven't been able to reach Mitek since just after I bought it. I can only assume they aren't around anymore.

I'm a machinist, not an electronics or maintinance guy, and while I'm fairly good at diagnosing problems, I don't know where to start with this. All fuses I can find are fine, not sure if there is a breaker/reset hiding somewhere. With the exception of the spindle controller and servo amplifiers I don't know what all the components are in the enclosure, and therefore can't identify what parts are involved.

I've included a picture of the enclosure showing the components.
Thanks to all, any advise is greatly appriciated.

[Fagor - Todd]

What generally happens here is that one of your Glentek drives kicked out with a "Current Overload", in fact there will be a lit LED on one of them telling you which one, which in this case is probably the Z axes.

You can reset the drive by pushing the reset button on it or just power the machine down and back-up to reset the drive....

You might also want to make sure you have not governed your drives with the CL Pot on the drive (Current Limiting), they are typically a 3/4 turn POT and you need to have it turned all the way to the right to allow the motors full current capability.

I hope this helps. Good Luck !

[Todd H]

Thanks for the reply.

all the drives have the Run LED lit, without any others lit. The rapid over ride button on the control will still work while the control is running a program, it just won't work in manual jog mode.

The only POT I can find is reffered to as the loop gain POT, and all are turned fully clockwise.

I've owned the machine for about 6 or 7 years, and have never messed with anything inside the enclosure. This is why I'm baffled, because everything worked before the overload.

[Al_The_Man]

I doubt it is anything on the drives or adjustments, otherwise it most likely would not be OK in Auto.
If you normally have to select an axis when jogging manually, and it does not jog in manual at all for that axis it sounds almost like you have lost an input, either switch bad connection, broken wire etc, or least likely the input itself.
I believe you can monitor the I/O bits on that model, if so the input status screen may help.
Al.

[Todd H]

Thanks Al.

I can see the inputs and outputs, but honestly don't know what to look for.

The I/O screen has Inputs A through N with a 1 or 0 underneath, and outputs A through P with 2 rows of 1 and 0 underneath.

[Fagor - Todd]

My apologies, I didn't read your post clear enough the first time.....

I have had this happen to me before, its something simple.... but, I do not remember what I did to solve it.

As a note, on your I/O screens, the primary ones to be concerned with are the B & C & D inputs, they should all be 1's....(They are your emergency input, feedhold and remote cycle stop)..... but none of these are your problem, you would not be able to do much of anything if they are active (at zero)......

I will think about this, it was something simple before..... you might just have to home the machine considering it had an uncontrolled shutdown (Following error), also try something as simple as hitting reset twice..... and while in the jog mode, tell me what G & M codes show as activated on the screen......

There is nothing wrong with anything, its probably because a program was interrupted and not reset yet..... thus hit the reset key twice and if that doesn't work, do a home while in jog mode.....

[Todd H]

no appologies needed, I appriciate all the help. The problem didn't happen during a program run, i was using the jog to manually feed a drill for a quick thing I was doing.

I always have to hit reset twice. Since this first started happening, I've run a few programs, all without issue, all with rapid override functioning to overide programmed feed rates. Still doesn't work to override a feed rate when I use the manual/jog to control the machine with the axis buttons on the control.