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HI
Sorry, am I wrong or does LinuxCNC already take the tool values ​​from the .tbl file?
When you insert a new tool into the table, you update the table before closing it and LinuxCNC takes the new data, offset and diameter
X and Y depend on the rack are fixed in the tool_change.ngc file
It already works like this without external scripts
Maybe I misunderstand

Perfect. So each Mesa will have its own BIT file, specific to machine it is installed in and on the laptop side INI + HAL per machine. So it looks like GUI is invoked by INI file and each machine can have a different one. Nice. Looks like nice, interesting and long adventure:) Thank you.

I have redone the cabling between the EL5101 and the THCAD300. Unfortunately I was unable to measure the min/max voltage on the 5V supply from the EL5101. So I have switched to a dedicated 5V power supply to power the THCAD and used a new twisted pair of cables to connect the differential signal to the A+ and A- phases of the EL5101.

Unfortunately the issue persists. Drop length is about 10ms and seems to be at random intervals. Frequency goes from 1824 Hz at 0V down to about 25 Hz. Divider ratio on the THCAD is currently at 1/64.

The second EL5101 with the THCAD2 for ohmic sensing behaves the same way. However for ohmic sensing, the drops are not really critical and and functionality is still given. Different story for the THC which raises the torch on every drop.

Hallo,
I have a linuxcnc 2.9 installation with Mesa 7i76e controlling 
​​​​4 leadshine el7 rs servos via step dir. The encoder input of the 7i76e is used for the spindle.
Homing without index is working perfect.
Is it possible with current hardware to home with index.
I can read the short index signal with Hal Scope. For a & b i have no inputs left.
I tried with software encoder in hal but homing ignores the index and axis moves on.
Do i need a firmware update for the 7i76e like a read a lot with stepgen and index homing?
Thank you

 

Danke! Ja ich stell mal HAL und INI hier rein. Ich hab gestern etwas Zeit mit ChatGPT verbracht was mir sagte, ich soll mal den Pin "In der HAL (Hardware Abstraction Layer) von LinuxCNC steuert der Pin motion.feed-override den Feed Override Regler." überprüfen.
Dann noch die Empfehlung, zwei Verknüpfungen rein zu nehmen:

net feed_override <= halui.feed-override
net motion_feed_override => motion.feed-override
Das hab ich gestern spät noch gemacht konnte es aber nicht prüfen, da komme ich erst abends wieder zu.
Danke für Dein Auge!
Hanno

Nachtrag: Habe diese Einträge heute in der HAL gemacht, die Maschine startet nicht damit - Fehler - halui.feed-override existiert nicht.

 

I disagre. There are many commercial systems that have been retrofitted using Mesa cards. A friend has a 35 tonne 5 axis machine controlled with Mesa. He uses servos not steppers.

Yes, usually you keep the drives (but often people replace them) and limit switches etc and remove the existing controller and replace with suitable  Mesa cards.
Ethercat is really a relatively new kid on the block for Linuxcnc. Its been around for a long time but it was very difficult to configure until the release of version 2.9

These drives do have a common input so you can run 24v for I/O
Also you can define an input to respond to an estop signal to disable the drive.
Dropping mains power is not ideal. Some big machines cannot be allowed to coast to a stop.
You could add a timer relay so the drives were disabled and stopped before the power was removed.
But this should be built into the safety relay if you are building a standards compliant safety system.
Ethercat in general seems to recover OK once powered on again.