Using/verifying the BitZero

Here is how I check out the functionality of the machine/BitZero:

​ - first check that you have sent the correct Z-axis configuration, go to the MDI and send $$ and check that the Z-axis steps/mm match your machine setup:

​ - Belt-drive: 40
​ - Z-Plus: 200
​ - HDZ: 320

​c.f.,

Then, clamp a suitably stable piece of stock to the machine:

Initialize the machine, loading a suitable probing pin, allow Carbide Motion to measure the tool if a BiSetter is enabled, and position the BitZero, and jog the machine into position relative to it and attach the ground lead:

click on the “Probe” button in the Jogging pane, select the appropriate BitZero type (if using a version of CM which queries that):

Select the desired probing cycle:

(we will use “Corner”)

Follow the prompts:

“Begin Probe”

​Ensure that the BitZero unit does not move while probing — if it does, repeat:


Remove the BitZero and ground lead and jog to verify the positioning — the Rapid Position Pane has buttons suited for this:

Rapid to current XY
​Rapid to Current Z+6mm

If one has a 6mm dowel it can be used to verify Z, or jog up by 0.35mm and check w/ the shaft of an endmill or a precision rod:

To further verify, one could load a V endmill which makes check XY easier — loading a suitable endmill and facing off the material and repeating will allow measuring the Z.

2 Likes