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HI
I am wanting to add an optional rotary function to my table, to have a tubing cutter.  With another controller and software I just switched the Y axis control output cable to the rotary axis motor.  This is also the way it is done with my desktop laser to use its rotary optional drive assembly.
On my table I and using LinuxCNC software with a Mesa 7I76E card and QTPlasmaC GUI.  I have tried to leave out the Y home/limit entry in the pncconf setup, but it will not enable the Y axis.  I understand the need to do the homing operation so the software knows where it is for running a G-code.  After the homing I can position any axis to a location and then zero out the DRO and use that as a start position for the G-code. 
What I want is the Y axis not needing to home to be active.  This would allow me to home X and Z and position the Y to a zero position manually.
Thanks for your time
Tom V 

Thanks, sent it again.
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Max

I don't see that, If you try again, I'll check the spam bucket...

I wrote an email on March 24th and haven't heard back, so I just wanted to follow up in case it got caught by your spam filter.
-
Max

Usable hal pins
amplifier-enable
machine-is-on
e-stop-out
x-enable
something like this
x-enable hm2_7i76e.0.7i76.0.0.output-00
Replace board and pins accordingly.

Pretty sure 2.9.3 should be OK (7I76EU support was added 2 years ago)

Mesaflash >3.5.2

So

7I76EU TB4     DRIVE

1 SPINDLE-      2 MIN
2 SPINOUT       3 IP
3 SPINDLE+     1 +10V
5 ENA-             4 COM
6 ENA+            5 RUN

Note that some or all of these connections may be at line potential
so make sure you do not touch them or allow them to connect to
any low voltage signal.


 

What version of mesaflash and LinuxCNC is needed for the 7i76EU?

Thanks
JT

Just email This email address is being protected from spambots. You need JavaScript enabled to view it. with your address and request
and we can put a couple in an envelope.

Encoder 2 on the 7i85S is used for the spindle and is actually single-ended, but it's still working fine. So I guess I’ve been lucky there, considering the damage on the board.

I’d really appreciate it if I could get two replacement chips, if it’s possible to have them shipped to Germany.
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Max

That wire is on a 5V regulator pin, so maybe related, hard to tell.

Yes, NCV7608s are obsolete, we do have spares if you need a few.

Thanks, Tommy.
The shop is heated and very dry, especially during the German winter, so moisture is probably not the issue.
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Max

Picture 2, that looks like arcing across those two parts, moisture can do that, but the rest of the boards look like there is no moisture in quantities to cause that.

Thank you for your response, Peter.
Is the NCV7608 still available? I only found one listing on Aliexpress, which makes me wonder if it’s becoming hard to source.

While taking a closer look at the board, I found a small piece of cut wire lying around in that area:
 
 

Could this have caused the issue?If not, what else could I check to resolve the 5V overvoltage?
The 7i85S is powered via the 25-pin connector from the 7i76E.
Thanks again for your help!
–
Max

Not sure about the 7I76E outputs, but the 7I85S seems to have been damaged by an overvoltage on the the 5V
supply, possible related to the original fault. It appears that both the IS32174 step/dir driver and U11, the LMV342
have been damaged.

7I85 U11 is part of the encoder circuitry when TTL mode is used, it will not affect differential mode encoders
so the 7I85s will probably continue to function for encoder inputs if they are differential, BUT the 5V situation
needs to be checked.

On the 7I76E, the damaged driver chip (NCV7608) should be replaced as it may fail further and perhaps cause
further damage.