Z probe repeatability - no data

I enabled z probe repeatability in the firmware, but when I run a M48 command, I get all 0s:

SENDING:M48 n10 V4
M48 Z-Probe Repeatability Test
Positioning the probe...
echo:busy: processing
echo:busy: processing
echo:busy: processing
Bed X: 100.000 Y: 100.000 Z: 0.000
echo:busy: processing
echo:busy: processing
1 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
2 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
echo:busy: processing
3 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
4 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
echo:busy: processing
5 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
6 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
echo:busy: processing
7 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
8 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
echo:busy: processing
9 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
echo:busy: processing
10 of 10: z: 0.000 mean: 0.0000 sigma: 0.000000 min: 0.000 max: 0.000 range: 0.000
echo:busy: processing
Finished!
Mean: 0.000000 Min: 0.000 Max: 0.000 Range: 0.000
Standard Deviation: 0.000000

When the test ends, the lcd screen shows an M105 command, and pronterface keeps echoing: echo:busy: paused for user

Am I missing something in the firmware? My probe works fine otherwise, z endstop logic is ok.

If those numbers were correct, you would have a perfect printer. But obviously, you have something else going on. Does it home with a G28 correctly?

Do you have an LCD Display panel? What does it say on the LCD after you home. (If no LCD, what does M114 say after a home?)

Yes, it homes correctly. I do have a LCD panel. After I home with a G28 or with the home xyz button on pronterface, it homes and then goes to X100, Y140, Z0. That's what the LCD says, and an M114 says the same thing. A home operation performed with the LCD does and says the same thing. Thanks for any help with this.

Do you get same if you send

M48 P10 X100 Y100 V4

And a couple more questions:

Are you using a Cartesian or a Delta printer? The M48 was not supported on Delta's until 6 or 9 months ago.

Are you using marlin's RC-7 or RC-8 ? If not... You should seriously consider making the migration.

I'm using RC8 on a cartesian prusa mendel 3. I have mesh leveling enabled.

I haven't tried that exact command Obewan, but I have tried probing different points with M48 and V4. Not home right now, but will try that when I am.

Edited 1 time(s). Last edit at 01/07/2017 11:48AM by Scott1326.

Update:

Interestingly, when I turned off MESH_BED_LEVELING and enabled AUTO_BED_LEVELING_BILINEAR, I was able to get proper data from the Z probe repeatability test.

Quote
Scott1326
Update:

Interestingly, when I turned off MESH_BED_LEVELING and enabled AUTO_BED_LEVELING_BILINEAR, I was able to get proper data from the Z probe repeatability test.

That is very strange! M48 definitely should work with Mesh Bed Leveling. And in fact, the Marlin UBL branch is really Mesh Bed Leveling at the foundation. It works fine with M48.

This is with RC8. I will try sometime with UBL.