EMCO VMC-300 ATC configuration

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13 Sep 2023 08:17 #280607 by kimachren
Hello,

Here we have yet another ATC configuration thread :)

I'm about to start converting my EMCO VMC-300 from Sinumerik 810m to LinuxCNC.
Most of the things are pretty straight forward but the ATC is making me scratch my head.
I would appreciate if some skilled and experienced person could help steering me in the right direction.

The way the ATC is working now is as follow (see hand drawn sketch for better understanding):

Note: Tool change position is above the normal soft limit for Z.

In automatic mode, from g-code:
1. Spindle stops and orients to fit the drive dogs.
2. Spindle head moves up until it reaches S5. During the movement, mechanics grips the tool holder and actuates the push rod.
3. When the head is at top position, a gear wheel on the top of the spindle shaft engages a bevel gear. This bevel gear drives the carousel via a second gear pair with unknown ratio. In other words, it is the spindle that drives the carousel.
4. During the rotation, the system monitors two proximity switches, S2 and S3 in the sketch. S3 is for slow-down/braking and S3 stops the carousel at a precise position. During the first tool change after power on, the system revolves the carousel one additional revolution and thus homes it to S1.
5. With the carousel at the correct position, the head moves down, decoupling the bevel gear and the mechanism releases the tool holder from the grippers and the spindle clamps it.

In manual mode, when changing the tools:

Same procedure but the head stays in top position and thus allows the tool holders to be removed from and inserted into the carousel grippers.
When the user pushes a reset button, the head is allowed to be jogged downwards (but not up) and into the regular soft-limit zone.


As I see it, there are three different options:
1. Try to use a remapped M6 with O-codes, moving the Z-axis and running the spindle (as _spindle_). This might be tricky due to the need for altering soft limits.
2. Use the existing carousel.comp and some classicladder or possibly M6 remapped to a python.
3. Write a full blown custom .comp that handles everything.


Does any good ideas or thought come to mind? Please share them :)




 
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15 Sep 2023 11:27 #280830 by andypugh

Note: Tool change position is above the normal soft limit for Z.


Interesting design.

With regards to the tool change position being outside normal soft limits, I helped configure that on a mill recently. We used mux components to alter the values of the ini.(x,y,z) HAL pins based on a bit input that was driven by a digital output in the tool change subroutine.

linuxcnc.org/docs/html/man/man1/milltask.1.html
linuxcnc.org/docs/2.9/html/man/man9/mux_generic.9.html
linuxcnc.org/docs/2.9/html/gcode/m-code.html#mcode:m62-m65
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15 Sep 2023 11:41 #280834 by kimachren
Thanks! I will look into this.

I read somewhere that this should be possible, but the person that tried it did not succeed due to the look-ahead of the interpreter. But if you have successfully implemented it, it gives me hopes :)

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18 Sep 2023 08:21 #281051 by andypugh

I read somewhere that this should be possible, but the person that tried it did not succeed due to the look-ahead of the interpreter. 

Tool-changes are a queue-buster so the interpreter won't (or shouldn't) run past them. It is possible that whoever looked into this with you didn't have a tool change command in the test setup. 
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23 Sep 2023 15:41 #281482 by rexo
Replied by rexo on topic EMCO VMC-300 ATC configuration
Hello,
i have retrofitted EMCO VMC200 to linuxcnc, it's same as VMC300, only with different controll, i can send working config for machine, spindle orient, synchronized tapping and toolchanger. 
here is video from milling :  

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26 Sep 2023 12:22 #281644 by kimachren
Wow! That would be extremely helpful. Could you put it here in the forum?

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26 Sep 2023 13:57 #281650 by kimachren
What driver boards do you have btw.? Mesa?
How did you solve the manual tool change, i.e. when you switch tools in tje carousel pockets?

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26 Dec 2023 10:40 #289082 by jefsaro
bonjour , j' ai la même configuration sur ma fanuc o mate t, je suis interesser par le sujet , il ne me reste que cela a regler.
merci pour votre aide

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26 Dec 2023 14:07 #289090 by kimachren
Hello,

I managed to translate using ChatGPT :)

Unfortunately, some things are just too good to be true and I do still not have a working configuration. Actually I managed to add a few options to the original Sinumerik 810 amd have been running that since.

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26 Dec 2023 14:12 #289091 by sin-do-re
Hello, mr Rexo, could you please upload your config files? I have a similar retrofit which requires the spindle orient function and other functionalities you use.

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