Hello to all! I have a camshaft grinder wich is working with a MESA 5i20 for 8 years more or less. Never had a problem until recently.
A couple of days ago I had a major failure on the PC (not the power supply) so I replaced the complete unit to put the machine to work and then repair the other one. I also had a failure on one of the stepper drivers (probably the output stage since it's oscillating when I try to move it). It's more than likely that all these fails ocurring at the same time have the same source wich I believe could be a short circuit due to coolant vapour inside the cabinet. Anyway, I installed the new PC and new driver and everything seems to work fine except that from time to time I have two outputs activated when I activate only one. More precisely, when I try to jog the spindle (I don't have a VFD is a two speed 3 phase induction motor with contactors) the output jogs the spindle as usual but also, the electrovalve that moves the hydraulic pivot the machine is activated/deactivated. Looking into hal, there's no activation in the LinuxCNC virtual pins, but I do get an activation from the 5i20 output port. I changed the physical output ports of the 5i20 to try the other connector and I still have the same erratic behaviour. I re installed LinuxCNC with the last wheezy .iso and the problem showed a few times. Now it's working ok, but from time to time the problem appears. I suspect this is an FPGA related problem may be? Or with the resistors at the output? Thank you as always! Leonardo Marsaglia ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
