TNC2500 Random Shut Down Errors

[noremac]

I have an Interact 412 with TNC2500 control. It has started to randomly shut down.

When I first power it up cold, it goes through the memory test and waits. As soon as I enable it, it crashes, indicating a Gross Positioning Error, usually on Z-Axis, but sometimes on the Y-Axis.

After the electronics have been powered up and warming for awhile, I can start the machine and operate it successfully for a random period of time. It will work awhile, then crash on a TNC Operating Temperature Exceeded.

I have photos of the error codes for several crashes if the inifo is any help.

Thank you,
Cliff

[awemawson]

Blocked or o/c fan no longer cooling the controller?

[noremac]

No. The TNC panel is open and when I scan with an infrared thermometer the highest temp I find is 30C. This controller has no forced cooling and has never been a problem before now. I suspect the control board(s) may have some bad solder joints due to flexing. The screws attaching it to the framework were loose.

A schematic and board layout would be very helpful to track this down. Anyone able to help?

Thanks,
Cliff

[gus]

heidenhain does not release schematics only flow charts and functional diagrams. The 2500 is the same as a 360 IIRC and there are some manuals on the website.

What drives does this machine use?

[noremac]

Bosch on the axes, Fanuc on the spindle. Thanks, I'll see what I can find on the 360.

Cliff