On Tue, 17 Apr 2018, Leonardo Marsaglia wrote:

Date: Tue, 17 Apr 2018 16:51:51 -0300
From: Leonardo Marsaglia <ldmarsag...@gmail.com>
Reply-To: "Enhanced Machine Controller (EMC)"
    <emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Subject: [Emc-users] Possible MESA 5i20 problem

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?

If you have the same issue on the same pins of multiple I/O connectors of the 5I20, it could be a bus problem but this is more likely to cause other issues. Did you change daughtercards/cables when you changed 5I20 connectors? because a problem that stays with the cable/daughtercard is more like a problem with those components.



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


Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


------------------------------------------------------------------------------
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

Reply via email to