PRB0005 Error during probing cycle with Bitzero

[bmcdowel (Bryan Mcdowell)]

Attempting to set the zero for a new job with the bitzero V2 on my Shapeoko 3 XXL with CM V640. I am setting the bit down into the pocket, attaching the magnet ground wire, then go to probe. I am then prompted to select the bit size, (new). When I start the probe, the bit just traverses straight down to the bottom of the bitzero (instead of measuring X,Y side to side, front to back). At this point the probing cycle errors out with the following error:

Please start the probing cycle with the spindle closer to the probe.

NOTE: If the machine crashed into the probe, you will need to reinitialize the machine to continue.

This is equivelent to GRBL Alarm 5.

https://qr.carbide3d.com/error/prb005

The link above is broken and the page cannot be accessed,

Can someone explain this strange behavior?

I have not seen this before while trying to set the zero with the bitzero v2 probe.

Kind Regards,
Bryan M.

[gdon_2003 (Guy Donham)]

I dont have a v2 BitZero but I think you have to start less than 6MM above the BitZero. On the V1 you have to start 6MM or less above the BitZero because that is assumed in the operation. The bit travels down to given depth before trying to find the edges of the BitZero. Suggest you find the user guide for the V2 BitZero to verify where to start the probe.

[bmcdowel (Bryan Mcdowell)]

I am definitely setting the bit less than 6mm above the bitzero. Setting it inside the pocket about 1/4" or less. It should then measure X and Y then lift up and measure Z on the top of the bitzero, It has always worked this way since I got the bitzero over a year ago.

This is new behavior and I am not sure if it is related to the recent changes made to the workflow in CM but I know it did still work correctly after the new workflow was implemented in CM 636.

[WillAdams (William Adams (Carbide 3D))]

Do you have a v1 BitZero selected?

See:

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 This can be easily done by jogging down to the wasteboard surface, setting zero, then using the Rapid Position command to lift 6mm above the current zero — measure how much the machine moved — if it’s wrong: open the Log Window go to the MDI (EDIT: Note that it will need to be enabled in options in current versions) and send $$ and check that the Z-axis steps/mm …

[bmcdowel (Bryan Mcdowell)]

Hi Will,

Ok. The Z measured correctly but somehow the probe was defaulting to the v1 bitzero instead of the v2. I selected the v2 and it probed correctly,

Thank you for the information.

Kind Regards,
Bryan M.

[gdon_2003 (Guy Donham)]

The v1 and v2 have different heights and as you found out they dont work the same. the v1 has to be over a circle on the top of the BitZero. Then the X and Y are found and then moves to the top of the BitZero for Z. The v2 goes down the hole and finds X and Y and then moves to the top for Z. since the two BitZero versions have different heights and different way of finding X and Y that is why it failed. Good Luck in the future.