I’ve mentioned in the past that I planned to add a 4th Axis to my Taig. With a 4th axis, the items that you can mill open up significantly. For example, gears are very easy to do with the table in a 90 degree position. You can also cut threads inside or outside of an item by laying the table flat on the x axis. Lastly, if you use a tailstock as well, you can mill the top and bottom of an object if you build the right jig.
In order to make it work, I first had to add another stepper controller to my CNC controller. You can see in the picture below that I’ve added the board all the way on the right. I also added a relay board, but I haven’t put that to use just yet. More on that to come.
On the stepper driver itself, I added a piece of angled aluminum to act as a heat sync. Running 3 amps of current through those motors generates a bit of heat. Its a little smaller than the one that Probotix used, but it should work well enough. Time will tell. There is a nice large fan that blows across them as well. I’ve used another xlr connector to connect this new stepper to keep consistent. I actually believe the xlr connectors work very well for this. The next picture is one of the power supply. This is a 40V linear power supply. Its a beast!
The following picture is the Sherline Rotary Table installed on the Carter Tools right angle adapter mounted to the Taig Mill. I’ve installed another Probotix 280 oz/in stepper. I don’t think that much torque is necessary for just using the 4th axis, but if I convert this to a 5th axis machine it will help with the additional weight.
Lastly, I’ve captured a video of it running. It looks awesome and I can’t wait to use it!