I have a Fisnar I&J500 Selective soldering robot that has failed. I think it is from around 2000. The Fisnar I&J500 base has a soldering attachment on it.
As I understand it, the base controller sends it a 5 bit command to the soldering unit. The 5 bit code selects 1 of 32 pre-programmed soldering block operations. From the timing diagrams in the manuals I have, it then waits for the soldering unit to send back an ack when done. My guess is that the ack is not coming back so the base keeps waiting.
The module has a hand held pendant to program each of the 32 soldering block commands. This still works. That said I can't command it to run a soldering block via the pendant either. I think this indicates that the micro is not receiving the correct state of an input. Not sure which one though. Also the module has a 'Ready Status' LED. From memory this comes on when the unit is ready to operate.
Does anyone have schematics for the selective soldering head and/or the base unit? It would really help me repair activities.