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I use Ditron magnetic scales all the time. Installed my first ones in 2019 on my 5 axis machine. Since the I have used installed about 20 of them. Not a single failure yet.

Be sure to specify that you want 1um resolution. Reader head model DMR2000. And also specify that you want the index pulse version (z signal) otherwise you get only A and B.

Yes. They are differential output

Henk

We've got plenty of trees, but the city white fellas cos playing as black fellas wanna stop everyone walking into where the trees are, unless you're a black fella.
The real black fellas are good fellas.

Now before everyone gets their knickas in a knot black fella isn't an insult, it doesn't matter if ya a black fella or white fella what matters is to be a good fella.

There's large swathes of land here that are off limits unless you're Aboriginal.

Hi,
only one 7c81, you tip has done the trick. Thank you!
but the next problem occured
The error changed to:
/intos.hal:88: parameter or pin 'hm2_7c81.0.7i77.0.1.analogout0-scalemax' not found

so checked this line in the old, working hal, without the 7i78, and its exactly the same. What does change here when i use 2 daughterboards?
Any Ideas?

EDIT:
i have also tried to change the channel number to 0:
hm2_7c81.0.7i77.0.0.analogout0-scalemax'
and 2 and 3

Es siet die 5V fuhr die Mesa nicht OK zu sein, haben sie ein andere 5V strom wers... (power supply, forgot how that is written in German, sorry) zum testen, oder ein DVM die 5V zu messen? Es soll zwishen 4.75 und 5.25V sein.

unknown wrote:

I'm thinking of selling up, clearing the garage and start carving pipes..... .I don't even smoke.

I'm thinking of leaving everything and heading for woods to live there!
The issue is, we have no woods left, it's all been cut down, except for some bushes, and i can not hide behind those!
Painfully true, i am surrounded by huge mountains that have no more trees, at all.
But i do smoke, since i do not drink nor gamble nor ....

jackdavies wrote:

The Y axis has dual motors, should I use a scale on each side or just one?
Any recommendations of mesa boards to use here? 7i95T + 7i84U or 7i96 + 7i85
Whats the process for setting this up in LCNC?
I don’t believe these scales are differential signal, should I look for that?

1. You should, the expense does not justify having missed steps on one side and ending up with a miss aligned gantry
2. For step/dir drives, 7i95T should be enough if you do not need a lot of IO. So a 7i84 would be required on both combos if you do need more IO.
3. a bit of editing will be needed either way, plenty of info and help here once you get to that point
4. differential are better for noise immunity, but Mesa works with both differential and single ended. They should be incremental TTL, as far as i know. Absolute type would require other boards/config/ depending on type of comms.

I'm thinking of selling up, clearing the garage and start carving pipes..... .I don't even smoke.

Hallo,
der Ping mit 200ms Latenz scheint mir recht hoch. Hast du dir die Sachen die PCW im 2. post hier forum.linuxcnc.org/27-driver-boards/5284...nishing-read?start=0 vorschlägt schon alle erledigt?
Ich nehme an die Karte hängt am ethernet port und nicht an einem usb2ethernet adapter oder dergleichen?

You are welcomed, always.

How many 7c81 are in use?
for one only, delete the line containing 1
addf hm2_7c81.0.read
addf hm2_7c81.1.read
Pretty sure this should only be used if you have 2 of 7c81, 0 and 1 there are enumeration for 2 of 7c81 not the add on cards, they do have their own enumeration after the model number, example:
hm2_7c81.0.7i77.0.0.input-07
First 7c81 that has the first 7i77 attached, first is always 0 with Mesa and LinuxCNC enumeration.
Had a look at your hal, there is more editing required, so it might be easier to make a new config with a single 7c81.

pgf wrote:

... designing arbitrarily complex digital "circuits" in a text file.

That is a nice way to explain it, thank you.
-
-GRBL is simple and quite easy to setup and use, once you figure out the quirks.
-FluidNC is simple and easy to setup and use and runs on an ESP32, magnificent!
-Klipper is complicated in every way possible, but quite easy to setup after spending weeks of reading, it is very good at what it does, can be modified a lot, but the huge overhead (hundreds of required packages) makes it not very reliable (works for months without issues then suddenly goes on hiatus), with very little ability for troubleshooting
-Marlin is not easy to setup but luckily there are ready made configs/images, easy to use, runs even on 8Bit micros, works "stand alone", and frankly it is amazing how much functionality is crammed into it.
-LinuxCNC is very dependent on what you need from it, very easy when using parallel port, easy enough when using most Mesa cards, all thanks to the insane amount of work put in by members of this forum and developers, but can be complicated as much as you are willing to ask from it. I can go on for days...
-
To better understand the flexibility of LinuxCNC, just pick one of the projects started on this forum, like QtPyVCP Probe Basic (or Basic Probe, i always mix those), QtPlasmaC, QtDragon, PlasmaC, MonoKrom, etc. Some of them started just by someone asking here and inside a week there were actual working GUI's being developed, search for "Brender".
I have to stop...

Hi,
thanks for your fast reply.
if you read in the hal, there is written :
addf hm2_7c81.0.read
addf hm2_7c81.1.read
for both cards
.0 is the 7i77 and .1 is the 7i78
I interpreted the documentation that it should be done like this.
Any advice how it is configured correctly?