PicEngrave Forum

I have just finished changing my X and Y linear bearings and am excited about how much better things are running. I am going to re-build my Z axis because raising and lowering the table can not go fast enough to run PL 3D successfully. I plan on running the stepper motor with a timing belt to the lead screw as vertical space is limited. My question is: What would be a good ratio between the stepper motor and the lead screw? There are many different designs and ratios of DIY Z Axis on the internet. Right now it is an option as all the parts are just a big pile of bearings, belts, sprockets and motors on my work bench. I notice on Jeff's' pictures that he has machines with both geared and direct 1:1 ratios to the lead screw.
What do you think????
Thanks Jerry

Hi Jerry,

Whatever ratio you use, try to keep the steps down enough so the Z axis movements does not effect the overall blended feedrate.

What pitch is your Z axis lead screw that you will be using?

Jeff

Hay Jeff
It is 5 MM about .2 in. I think. China can surprise me.
Jerry

Jerry, I would try a 1 (stepper) -2 (Z axis) ratio. You want the Z axis to move faster with smaller movements from the stepper as long as it has enough torque. That will keep your steps per setting lower.

Jeff

Thanks Jeff
I'll give it a go. I'll let you know,
Jerry