[TTalma]

It looks like the spindle orientation is off, the spindle is not where it needs to be, when a tool change is taking place, is there an encoder on the spindle, or a sensor of some kind to orientate the spindle. this would be what you need to be looking at. the spindle needs an in-position sensor.

No there is no encoder on the spindle. According to all the documentation this tool holder is self algining.

[mactec54]

No there is no encoder on the spindle. According to all the documentation this tool holder is self algining.

It can only be self-aligning, if the spindle does not move in between tool changes, so if you were to do a spindle warm up, and then select a Tool it could quite easily do what has happened.

It should be self-aligning with all those teeth, if the spindle moves though after it has dropped a tool in its pocket, then it could easily do what has happened in your photo.

Does it lock the spindle when the tool is changing, this would be done with DC Braking if it has this.

[TTalma]

It can only be self-aligning, if the spindle does not move in between tool changes, so if you were to do a spindle warm up, and then select a Tool it could quite easily do what has happened.

It should be self-aligning with all those teeth, if the spindle moves though after it has dropped a tool in its pocket, then it could easily do what has happened in your photo.

Does it lock the spindle when the tool is changing, this would be done with DC Braking if it has this.

The spindle spins free. If you spin it with your hand it spins quite easily. Which makes it surprising that it can get in that position. If I try to do it manually it can take like 30 trys to get it to happen when I'm guiding it.

I was thinking about it today and it probably happens once a month, or after several hundred tool changes.

I will have time tomorrow to mess with the sensors. I have a tool holder with messed up threads. I am going to put a weld in a couple of teeth and grind/file it even with the top of the teeth for testing.

[mactec54]

The spindle spins free. If you spin it with your hand it spins quite easily. Which makes it surprising that it can get in that position. If I try to do it manually it can take like 30 trys to get it to happen when I'm guiding it.

I was thinking about it today and it probably happens once a month, or after several hundred tool changes.

I will have time tomorrow to mess with the sensors. I have a tool holder with messed up threads. I am going to put a weld in a couple of teeth and grind/file it even with the top of the teeth for testing.

Yes, the spindle drawbar sensor would be important, in this case then, with this sensor set correct, hopefully it will not start the spindle when it is like this.