On Tue, 1 Dec 2020, Todd Zuercher wrote:
Date: Tue, 1 Dec 2020 21:22:30 +0000
From: Todd Zuercher <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: Re: [Emc-users] Servo Amp Documentation?
Unfortunately the wiring is very simple in this machine. (It's just a small
sign router.) There is a main control board, with a couple of daughter boards
(one for coms the other is the main brain) the encoder cables are plugged into
the main board, as are the limits, and some other misc IO. Then there are 3
ribbon cables one for each amp. That it. I've checked the integrity of the
ribbons and they all seem fine. There isn't a bunch of individual wires
anywhere that one could come loose and cause this. The amps only have 4 other
wires 2 for the motors and 2 for the DC supply.
You might check the states of the inhibit outputs, that seems to be the only
way the drive signals a fault.
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-----Original Message-----
From: Gene Heskett <[email protected]>
Sent: Tuesday, December 01, 2020 3:44 PM
To: [email protected]
Subject: Re: [Emc-users] Servo Amp Documentation?
[EXTERNAL EMAIL] Be sure links are safe.
On Tuesday 01 December 2020 12:22:25 Todd Zuercher wrote:
Anyone out there have any documentation for an older Elmo, DC brushed
servo amp/drive, model SSA-8/100? Elmo's web site seems to only cover
their current product line.
I have some machines using those amps. The control on one of them is
setting an alarm "FAULT IN Y AXIS". The control's documentation is
useless, the only trouble shooting it has is "Check Servo-Amp Board,
circuit & wiring for the affected axis. Repair/replace as required."
The amps are all powered, the motor and encoders are connected, all 3
amps show the same LEDs lit, swapping motors has no effect, swapping
cables has no effect, and swapping amps has no effect, I can't think
of what else to try.
I would trace that specific signal as its likely a dc voltage, or lack of it at
the amplifier. The fact that the error doesn't move when you swap amps around
wants to tell me its in cabinet wiring, something shaken loose perhaps?
Do you have any docs at all?
A clue as to how old it actually is?
Todd Zuercher
P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
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Cheers, Gene Heskett
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Genes Web page <http://geneslinuxbox.net:6309/gene>
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Peter Wallace
Mesa Electronics
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