Heiz T720 three years on.

[damian_uk]

The stepper motor is standard, and easy to obtain. I've carefully examined the screw thread. I see absolutely no signs of wear - as is reflected by the machine's light use. I can't remove the stepper motor because of the apparent way its been bonded to the screw thread itself. I can't remove the motor and the screw thread in one go because if it's length. The only way I can envisage getting at it is by removing the gantry sliders so I can drop out the whole of the Z drive mechanics out. The gantry slider rails are an interference fit, and I see no simple way of removing them. Your quite right. I would not consider buying another machine like this if you can't swap out stepper motors. That's why I chose to make the forum post.

[JAZZCNC]

Hi,

Chances are you won't see signs of wear on the screw thread it's self but you will feel any movement or Backlash and this is what your looking for.

I think your going to have to provide some good quality pictures of the problem area for us to help more.

I very much doubt they have built them not to be disassembled so chances are they are just securely bonded with some form of compound and fastening method.?

Post pics and lets see.!