Sturdy Rotary Axis for CNC table

[JAZZCNC]

And what is this stuff called dynamic balancer the Inturn 4rt axis implements. I would not need it i assume.

Like you balance car wheels the Spindle and brake rotor system need balancing so that's what that will mean.

Steve used to use 2 motors on the early prototype, stepper and DC treadmill but I think he's since switched to one servo with high ratio gearing for high speed. Then opposite Low ratio gearing for Resolution. Been along time since I looked so could be wrong.!

If your using Servo's then just use a braked servo and it will be enough for most wood work. Only if your milling steel where cutting forces are high will you need more braking power. But yes bicycle brakes will work and good ones like the Hope brakes on my Mountain bike have amazing stopping power in tiny package with rotors that weigh next to nothing.

The Hobby Matt lathe should work well I think upto Lathe speeds but if your wanting higher speeds more often than low then head stock bearings will die quickly.
I think if you Fit decent sized braked Servo on it with gearing you'll be ok for wood in both lathe and indexer/4th axis use.

[Boyan Silyavski]

Thanks Dean. That clears some doubts.

Here is the lathe, it seems obvious enough what to do. Have to disassemble all and take measures of the shafts and pulleys that will need.





I assume the correct motor will be 400w, will have to make some calcs and if 1 or 2 pulley. The original motor is 250w.
I assume the final ratio should be something like 1:6 to 1:9 . I am a bit lost here as this is my first lathe and still haven't had the time to go deeper in lathe jobs. and what speeds i need for what.


I assume the holding torque of the servo works just like the power, so if geared enough the force will multiply.

Have seen very cheap taper roller bearings on eBay + the housing is aluminum, so heat will not be e problem even if rarely i need to spin it faster.