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It worked! I don't have much time right now to play with it, but I was able to manually turn on the stepgen index-enable and it turned off and zeroed the stepgen count with the index signal. Thanks so much for your help with this, it's very much appreciated.

Sorry,  I got the stepgen version wrong, will retry.


Try this:

 


 

I loaded it once and power cycled it, couldn't see anything, so I reuploaded the firmware and tried both power cycle and the --reload. I also enabled the additional encoders in my hal file.

Did you power cycle the 7I76EU (or use the --reload command)?
 

Loaded up the firmware, but I'm not seeing the stepgen index-enable pins.  I looked in hal configuration and halcmd show pin in the terminal but I couldn't find them.  Would it make it easier if I picked up another 7i85S so I could have an encoder for each stepgen?  Thanks again for your help.  

Thanks so much. I really appreciate it. I'll load it up and give it a try.

It's a little odd because muxed cards are intended for encoders, so muxed encoders
and muxed stepgen index signals assume that there are an equal number of stepgens
and encoders. This could be fixed by adding a new pin type (muxed stepgen IDX)
but that would also require LinuxCNC driver changes, at least if done right.  

Here is an attempt:

 

I believe this has the stepgen index mapping the same as yours
for the first 6 indexes (0..5) , but then uses standard encoder pinout
for stepgen index 6 and 7 (since this allows 2 full encoders with shared
stepgen/encoder index pins) 

So you get 8 stepgen index pins, 3 working encoders (2 on the 7I85S and 1 on the 7I76EU)

A disadvantage of this current scheme will be that you need to enable all the encoders
even though only 3 are actually usable. I will take a look at better support for stepgen index
inputs using muxed cards, but as I mentioned, this will require LinuxCNC driver changes

I will take a look at fixing this but as I mentioned

Hi,
I was hoping someone might have a firmware file for a 7i76eu & 7i85S that enables the stepgen index homing.  Or if anyone has any links on how to make custom firmware I downloaded the source file and found a post with the necessary changes, but I'm not sure how to compile the firmware.

I didn't have enough encoder inputs so I only connected the index signals from my servo drives to the 7i85S encoder inputs.  Thanks in advance for the help.  

X-Axis ---> stepgen.00 --> hm2_7i76e.0.encoder.00.input-a
Y-Axis ---> stepgen.01 --> hm2_7i76e.0.encoder.00.input-b
Y2-Axis ---> stepgen.02 --> hm2_7i76e.0.encoder.00.input-index
Z-Axis ---> stepgen.03 --> hm2_7i76e.0.encoder.01.input-a
A-Axis ---> stepgen.04 --> hm2_7i76e.0.encoder.01.input-b
B-Axis ---> stepgen.05 --> hm2_7i76e.0.encoder.01.input-index
C-Axis ---> stepgen.06 --> hm2_7i76e.0.encoder.02.input-a

Hi everyone,I’m planning to rebuild one of my CNC mills and would like to use a Mesa 7I76E for axis and I/O, together with a Lichuan LC10E20E EtherCAT servo drive for the spindle.Has anyone here set up a similar configuration and can share their experience with this servo drive?One drawback of this setup is that I’ll need a PC with either three Ethernet ports or two plus Wi-Fi. I’d prefer a fully wired connection (to avoid potential noise issues), I’m looking for recommendations.Do you have suggestions for suitable hardware that would work well with this setup?Greetings from Germany

The code in my hal file is now
# --- SPINDLE-AT-SPEED ---
net ext_spindle-at-speed <= hm2_7i76e.0.7i76.0.0.input-12
setp lut5.0.function 0x0d
net spindle-enable lut5.0.in-0
net ext_spindle-at-speed lut5.0.in-1
net spindle-at-speed lut5.0.out

if I use hal meter to view the pins on lut5.0 the inputs have the expected values depending on whether the spindle is on or off and whether it is up to speed or not, but the output is always false.

What am I missing?

The 7I76EU inputs have and ~11K input impedance which needs to be accounted for
when driven by a high impedance source (it looks like your source impedance is around 5K Ohms) 

Hey guys,
I want to measure the internal temp of my jianken ATC spindle. I have a NTC with a classic voltage divider setup, and at room temperature the V_out of this divider carries 12V. (Measured against GND with a multimeter).

However, as soon as I put this cable into analog_in1 of my Mesa 7i76eu, the voltage drops to 8v, and thous the calculated temperature is garbage...

Any ideas why this is happening? 

regards
Sebastian

 

 

7i76EU in Portugal
eusurplus.com/index.php?route=product/pr..._62_71&product_id=50
OR
7i96S with 7i84
eusurplus.com/index.php?route=product/pr...t_id=104&search=7i84
eusurplus.com/index.php?route=product/product&product_id=159
Prices are without tax

7i96S in Germany
www.welectron.com/Mesa-Electronics-7i96S...-Ethernet-Controller
Prices are with tax

Note that the 7I76E/7I76ED have been replaced by the 7I76EU

Dear All,

For my project I'm looking for a Mesa 7I76E card.
Anyone has such card in perfect working condition for sale?

Thanks in advance,

Frans