On 4/10/24 10:58, Leonardo Marsaglia wrote:
Digging back into my own by now dim 54 yo memory, is that cpu perchance
a zylog, z80 or derivitive? The z80 has shadow registers, duplicating
the main set that there was a machine code to swap them. But zylog were
AH's and by the time I had troubleshot my code to determine the cpu was
duff, it was out of a 90 day warranty so I had to buy another to
complete my project. that was in 1980. I've never designed around a
sylog product since. The chances of one of them lasting till now should
be pretty slim, their process was subject to the purple plague but you
never know.
Hi Gene!
No, this one has no Z80s from what I can tell. It's from 1997. I guess more
than a CPU problem, this could be a memory issue affecting the CPU. In any
case, there's not enough information about how to track the problem. This
is why I don't like proprietary hardware like this.
That settles it, I was just crossing all the t's, so I'll continue along
that line. I've also had more than my share of flaky 2k by 8 bit memory
chips, but they are harder to watch. take your scope and look for a pin
that is not swinging from rail to rail, and look for chips with
blackened legs. If socketed give them a bath in a coffee cup of "Tarnex"
meant for brightening real silverware and rinse well, blow dry with shop
air, maybe even a gentle brushing with a brass brush to dislodge oxides.
I've kept stuff running 20 years past its sell by date with tarnex.
Stuff that spent the first 20 years of its working life in downtown LA
or NYC air, air bad enough you can see it. Pure hell on electronics.
El mié, 10 abr 2024 a las 11:47, gene heskett (<ghesk...@shentel.net>)
escribió:
On 4/10/24 10:08, Leonardo Marsaglia wrote:
Hi Todd,
Yes, this one has the Balluff BRGE1-WSE10 encoder mounted behind the
turret
cover. It's an absolute 10 position encoder and as told in the other
message, I'm just doubting this is the problem. I'm beginning to believe
may be there's a CPU problem because I'm getting too many weird
behaviours
every week.
Digging back into my own by now dim 54 yo memory, is that cpu perchance
a zylog, z80 or derivitive? The z80 has shadow registers, duplicating
the main set that there was a machine code to swap them. But zylog were
AH's and by the time I had troubleshot my code to determine the cpu was
duff, it was out of a 90 day warranty so I had to buy another to
complete my project. that was in 1980. I've never designed around a
sylog product since. The chances of one of them lasting till now should
be pretty slim, their process was subject to the purple plague but you
never know.
I would love to install LinuxCNC in this one but I would like to keep the
original servo motors. I can replace the encoders in the motors easily,
but
I still have to find a proper driver to use with the motors.
Are you sure that the machine uses an encoder for the turret
positioning?
The fact that it will work at some tool positions seems to sound more
like
it has a series of switches, and that one of them isn't working. The
switches might be arrayed kind of like a Gray code encoder to give a
form
of absolute position for each pocket. Loosing one signal could cause
several of the pockets to not be seen and cause an endless hunt.
El mié, 10 abr 2024 a las 10:50, Todd Zuercher via Emc-users (<
emc-users@lists.sourceforge.net>) escribió:
Are you sure that the machine uses an encoder for the turret
positioning?
The fact that it will work at some tool positions seems to sound more
like
it has a series of switches, and that one of them isn't working. The
switches might be arrayed kind of like a Gray code encoder to give a
form
of absolute position for each pocket. Loosing one signal could cause
several of the pockets to not be seen and cause an endless hunt.
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-----Original Message-----
From: Leonardo Marsaglia <ldmarsag...@gmail.com>
Sent: Wednesday, April 10, 2024 7:56 AM
To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
Subject: [Emc-users] OT: Balluff BRGE1-WSE10 encoder
[EXTERNAL EMAIL] Be sure links are safe.
Hello guys, I hope you're doing well
I'm having problems with a Daewoo Puma 12L lathe to index some tools.
The
problem is that some tools work well and others don't seem to be
detected
by the control to stop at the position and clamp the turret. So the
turret
keeps rotatring until the timeout triggers.
The lathe is working now because some turret positions are usable. But I
would like to try and detect the problem in case it's the encoder,
because
they seem hard to find. Are you familiar with any of these? My idea in
case
the problem is the encoder is:
1- Replace it for the same encoder (which I can't find anywhere)
2- Use a 100 pulses abs encoder and scale it via a microcontroller to 10
pulses to accommodate it to what I need. Then feed those signals to the
control. (The problem is I only found a basic manual for the encoder
with
the pinout, but nothing about how it behaves, I don't know if it uses a
BCD
or plain binary, etc...)
Of course in the near future this will be converted to LCNC and none of
this would be a problem. But in the meantime I would like to have a
backup
in case the encoder fails completely.
Thank you!
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Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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Emc-users@lists.sourceforge.net
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