Help Understanding “following errors”

[Al_The_Man]

There should be resistance to an attempt to turn the motor, if none, then the servo is either not enabled, or if it immediately fault on movement, this could be due to wrong encoder phasing, if the latter, this would most likely be a phase parameter, especially if you reloaded HD S/W etc?
For e.g. if you have the phasing parameter wrong the motor moves in one direction and the encoder counts in the opposite direction due to the wrong Para., hence error.
If this only occurred when you reloaded and it is in all axis, then I would guess it is something along these lines?
Al.

[FanFan]

CD,
Interesting. Very interesting. Sound like you are resetting up your machine software. I was assuming that you had F.E. issue during normal machine operations. I keep forgetting what happens when one 'assume' too much. I will try to shut up and just listen and learn. But... I would like to ask one question. Doesn't all the machine parameters come already loaded and activated? It sounds as if you are having to load them... as if it is the first time. Good luck.

FanFan

[Cellar Dweller]

FanFan,

One last question, since your last post begs the question. Is a F.E. very common with new software installs for users that don’t have their parms? Remember, I do have what are believed to be my parms, but not sure.

I know you may not have specifically said it, but as I said above it does beg the question.

With all the posts regarding HD failures, and all of my posts over the last week, I can’t believe that it is a common issue. I have of course read all the “hope you have your parms” type of warnings, but there are a lot of people, a lot of very experienced people looking at these posts, and I find it hard to believe that they would not have weighed in on that issue. As you said, we should not assume…

My understanding from reading search results (let’s not go there, LOL Put tags in your post please.) is that if you don’t have your parms that you will have a long road ahead of you setting things up, etc. But, in my case I cannot even jog the tool changer to set tool changer parms if I wanted to, soooo how is this done out of the gate? The defaults (which maybe I should load, mmmmm) should allow the axis to move? No? How does one start setting up if the axis won’t jog?

I had to throw this out there; hopefully some of you guys can provide some input on this.

Again, thanks a lot to everyone who has given their time to a stranger…..you see, people are good….in general…LOL

Thanks,
CD

[FanFan]

CD,
I have been out of the trade for a long time. I have just gotten back into the trade in the last half year or so. Some things have changed and most things have been atleast updated. AC motors with encoders were just starting to be popular. I am more familar with DC motors and tachs. Most machines that were in my shops were American machines with A/B 8200 control. They are not parameter rich controls. We had some Fanuc 11's and one or two Fanuc 15's. Now days many of the drives and most the controls have some user's access to machine parameters. Because of my limilted exposure to some of the Japanese controls I know a little about some of the parameters but I am definitely not the one you should be listening to on that subject. Listen to what Al is telling you.
As far as your parameter question I am not sure how to reply to it without possibly leading you astray. In the old days if the control loss all its marbles(memory) we usually just reloaded the 'exec' and some constants tape. We started at a level where the control knew it was Bullard 46 " VTL with an A/B 8200 AT control on it. In your case I am not sure how much yours knows. I suspect that it is starting from scratch. You are probably at a more base level. Again I am guessing that. I should just shut up. Listen to what Al is telling you. Good luck. I am hoping that I learn from your experiences. It is very interesting to me. FanFan

[machintek]

The fact that the drives come on and the z does not drop (brake off) means that in theory the drives are actually engaged and holding the z axis. At this point I do not care about X and Y. Next I would watch carefully if that axis or any other axis drifts slowly. If yes then there is a position loop issue.
Since you have a hybrid that someone threw together (discovery 308 with a TC22 guts), a big unknown is what changes were made to the software and parameters to achieve this.
My point is that it that if the axis is not drifting, Position loop and drive OK at this point, and you initiate movement (home) and then it faults, sounds like it is a control problem (or maybe the Z axis brake never released). Z homes first.
Do you have maintenance page? if so go there and turn the drives on. You can also watch every input and output and input as well as position and position error. Typically if position error exceeds .050 inches you get that following error.
If you have a maintenance page, you can turn the control On and not enable the drives but turn the X or Y ballscrew and watch it count. Put a dial against the table and make sure count is accurate.

George

[md63825]

CD,

Just curious, what version is your Bridgeport software? From my understanding, when you install the Bridgeport software, which I have never done myself, it ask a series of questions regarding the machine and from that information I think it generates a bmdcprm file.

I also have a TC22 and I am still plagued with following errors on my Z-axis. I have had the motor and the encoder serviced and I still have the problem. My problem is limitied to short z-axis rapid moves (1/8" or so) in the positive direction though. If the machine performs a long z-axis move, no problem. I just have to watch my programs for these short rapid moves. In my case, I think it has something to do with the acceleration/deceleration speed of the axis. It may also have something to do with the DOM because my machine had a DOM installed by the previous owner and they started having the following error problem somewhere around that time period. I had a new motherboard installed on my Bridgeport EZPath, which had a faster processor, and I noticed the axii reacted much faster. I still think there are parameters that adjust the takeoff or stopping speed of the axis. My Torq-Cut has BOSS BPC-MC V4.79.22/6.89.57 installed and I am still trying to find someone that has solid knowledge of the parameters on this software. Unfortunately, when Bridgeport went out of business, sounds like the software engineers that wrote this software disappeared as well.

And in response to an earlier question you had on the voltages at T2 and the axis motor drive card, voltage at T2 will be about 92VAC (+/- 9v) if your taps are using terminals 10 and 13. It will be about 100VAC if terminals 17 and 18 are being used. Thus, if you are using terminals 10 and 13 at T2, your voltage at the axis motor drive card will be approximately 132VDC (+/- 5v). If you are using terminals 17 and 18 at T2, your voltage at the axis motor drive card will be approximately 140VDC.