Lead screw upgrade

[William]

Hi,The lead screw has a diameter of 8, and a lead of 8,
If your lead screw is bent, you can contact your sales to replace it.

I found this: Z-axis steps_per_mm = (motor_steps_per_rev * driver_microstep) / thread_pitch

Motor_steps_per_rev: Steps per step of the stepper motor (200 steps for a 1.8-degree motor)
Driver_microstep: drive circuit subdivision
Thread_pitch : screw thread pitch

You can calculate it and modify it

[GAQ]

Hi Jhonmicky,

If you open your 'configuration.h' file in the marlin folder (Any text editor will do)
You will see where the axis steps per mm are set - about 1/3rd the way down the file.
If you had ordinary 8mm rod in your printer, you will see a line where the z axis has a value of 2560...
For your new 8mm thread rods, this will be changed to 400.

ie...

Code: Select all

*/
#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 2560, 90 } - (Or very similar )

would become...

Code: Select all

*/
#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 400, 90 }

Hope this helps

Gerry