I think it’s worth having a 4th axis. I could use it for my CNC mill and also for adhoc jobs on the laser cutter.
I checked ebay and those things are really expensive.
I figure I can buy a chuck like the one at the right. The problem is that I don’t understand the shaft. I think that’s tapered.
This looks affordable so I think it’s a matter of finding one with a straight shaft so I can put it on some bearings and then add a timing belt.
Of course once I get it working there will the the challenge of the software side of things. These guys are using some inexpensive software for cutting pulleys.
Here’s a great idea I got from Guy from Ottawa Robotics:
I now have a small chuck on order, will report back when I get it.