Hello all and thanks again for your support! Have been busy at the shop trying to write some code for the 260 and doing other tasks. The spindle engine play along making no fuzz about it's stator field problem but now the control starts quarreling but not about it's dreaded bubble memory who still seems to work well...
No, this time it´s communication, the RS232 port who just run it's TX port, no RX longer possible... Did a brief check of an I/O card who contains the RS2232, punch and video circuitry. Noticed that FANUC HW is also very well designed just as Siemens and U need no drawings to find the measure points for the DC power and some sync and clock signals. What an experienced electronics repair guy knows, is to first check-up the power supply and so I did and I guess it immediately paid off.. It should be if I remember it correctly +/- 15 V and 5V and it was around +11 - 19 and +1 It looks like an offset is introduced here, a minus 4... Thing is I measured the voltages in relation to chassis ground because of no extension card available and no suitable probes. It is possible that signal ground is designed to be at a different DC potential or floating compared to chassis but I don't believe in that. Maybe I'm wrong, what do you think? Another funny thing is that the control demands an erase of the entire bubble/program memory because of the communication fault. The control detects a Parity error when I tries to write to it and it obviously can't manage that. Well, the design is from 1980 and I guess LinuxCNC wouldn't behave like that ;-) Greetings / Roger ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
