Experience with rotary tool changer on planet-cnc MK3

[hoizlaender]

Hello all,

I have already one CNC milling machine with an MK2 board in use and I am pretty happy with it.

Now I am building a second one and I want to equip it with a rotary type tool changer. ( collets are stored in a rotating disk and a arm takes it and moves it to and in the spindle)
But at the moment I am not sure how to build this on the electrical side.

Is somebody around who has such a system in use?
Is it possible to controll this completely via the MK3 and scripts or is there a posibility to go over a LOGO module?

There is to controll:
- Rotation and position of the disk - servo or step motor
- pivoting of the arm (+ position sensors) - servo or step motor
- extension of the arm (+ position in/out sensor) - pneumatic cylinder
- lifting and lowering of the arm (+ position sensors) - pneumatic cylinder


Best regards,
Marc

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[hoizlaender]

I think it is no failure to explain my project a little more.

At the moment I am modifying a Hermle FW 800 to a 3-axis CNC.
Axis X, Y and Z- are already equiped with servo motors Type Bautz E728.
Drivers will be UHU´s.

The spindel I want to use is a used one of the company Jaeger. It is mounted to a fixed head - which is almost finished.
Now it is time to build the automatic tool changer. I need a device that takes the "used" tool holder, turns to the carousel,stores it and takes the new one.
This is planed as a mix of pneumatic components and stepper motors.
I want to operate the pneumatic components via M62 and use axis port V and W for the steppers.
The motions/positions will be controlled by sensors. (M59 should be the correct command to check and continue?)

But before I got into final plannings how to build I have to understand how I can implement a tool change in the g-code.
I think I am able to write a g-code to remove and store the used holder, select one tool on a specific position and feed it to the spindle.
But how...
.....is it implemented in planet-cnc that this subroutine is performed automatically.
....is the carousel positioned according T(n)
...is the subroutine "toolsensor" activated
and how is cooling/mist and RPM set according selected T(n)

[PlanetCNC]

Yes, this is possible to do in TNG. You will need to write script for M6 code. Then you use parameters for "selected tool" and "current tool" to determine what should tool changer do. There is a simple example for M6 tool change script in templates folder.

[hoizlaender]

Dear Andrej,

thank you for the hint with the template M6 - even when I don´t understand much.
For the 1st step I will bulid it and come back if I don´t get it working ;-)

Best regards,
Marc