Auto_Bed_Leveling: Enhanced G29 command

[AlexD]

I havvn't had all night to try and resolve the issue but here are a few more probes after trying to adjust, its not easy with my bed design.


RECEIVED: Bed Height Topography:
RECEIVED: +0.42460 --0.03290 --0.46540 --0.87290 --1.60040
RECEIVED: +0.68960 +0.26460 --0.12040 --0.54040 --1.25790
RECEIVED: +0.85210 +0.45960 +0.10460 --0.30290 --0.96290
RECEIVED: +0.94960 +0.59960 +0.31460 --0.03540 --0.60040
RECEIVED: +0.99710 +0.70460 +0.52210 +0.20960 --0.30040
RECEIVED:
RECEIVED: planeNormal x: 0.01 y: 0.00 z: 1.00
RECEIVED:
RECEIVED:
RECEIVED: Bed Level Correction Matrix:
RECEIVED: 0.999979 0.000000 -0.006402
RECEIVED: -0.000018 0.999996 -0.002818
RECEIVED: 0.006402 0.002818 0.999976




RECEIVED: +0.36340 +0.02590 --0.25910 --0.55410 --1.09660
RECEIVED: +0.53090 +0.22340 --0.02160 --0.31410 --0.84910
RECEIVED: +0.55340 +0.31090 +0.10590 --0.15910 --0.63660
RECEIVED: +0.53090 +0.33090 +0.20840 +0.02590 --0.35910
RECEIVED: +0.45840 +0.34340 +0.28590 +0.14590 --0.19410
RECEIVED:
RECEIVED: planeNormal x: 0.00 y: 0.00 z: 1.00
RECEIVED:
RECEIVED:
RECEIVED: Bed Level Correction Matrix:
RECEIVED: 0.999992 0.000000 -0.004072
RECEIVED: -0.000006 0.999999 -0.001534
RECEIVED: 0.004072 0.001534 0.999991






RECEIVED: +0.34800 +0.08300 --0.13950 --0.36950 --0.83450
RECEIVED: +0.45300 +0.21800 +0.04050 --0.21200 --0.65200
RECEIVED: +0.44800 +0.24300 +0.10550 --0.08200 --0.51950
RECEIVED: +0.34800 +0.22300 +0.14300 +0.01800 --0.35200
RECEIVED: +0.24050 +0.17800 +0.17800 +0.08050 --0.18700
RECEIVED:
RECEIVED: planeNormal x: 0.00 y: 0.00 z: 1.00
RECEIVED:
RECEIVED:
RECEIVED: Bed Level Correction Matrix:
RECEIVED: 0.999995 0.000000 -0.003162
RECEIVED: -0.000003 1.000000 -0.000814
RECEIVED: 0.003162 0.000814 0.999995






RECEIVED: Bed Height Topography:
RECEIVED: --0.00380 --0.09130 --0.14380 --0.20130 --0.54630
RECEIVED: +0.09870 +0.03870 +0.03370 --0.00880 --0.34130
RECEIVED: +0.11370 +0.08120 +0.11370 +0.09370 --0.20380
RECEIVED: +0.03370 +0.06120 +0.17370 +0.21620 --0.02130
RECEIVED: --0.10380 --0.00130 +0.19370 +0.27620 +0.13870
RECEIVED:
RECEIVED: planeNormal x: 0.00 y: 0.00 z: 1.00
RECEIVED:
RECEIVED:
RECEIVED: Bed Level Correction Matrix:
RECEIVED: 1.000000 0.000000 -0.000596
RECEIVED: -0.000001 1.000000 -0.000884
RECEIVED: 0.000596 0.000884 0.999999

[blyind]

hey, im having issues downloading the attachments from this site, ive tried every major browser and my phone, but it always loads up clear.gif...
is there any way one of you could put the files in a dropbox or something so i can get my hands on them?
i would very much appreciate it

[printbus]

hey, im having issues downloading the attachments from this site, ive tried every major browser and my phone, but it always loads up clear.gif...

3Dprintboard had some technical problems in April 2015. Many attachments posted prior to that no longer work. Nothing seems to be happening to fix the problem, so the attachments are likely lost. Can't help with the files, but now at least you know to stop trying.

EDIT: Roxy, you might consider editing your first post as required to eliminate this ongoing confusion/frustration.

[printbus]

hey, im having issues downloading the attachments from this site, ive tried every major browser and my phone, but it always loads up clear.gif...
is there any way one of you could put the files in a dropbox or something so i can get my hands on them?
i would very much appreciate it

This post should help -
http://3dprintboard.com/showthread.php?3105-Auto_Bed_Leveling-Enhanced-G29-command&p=61800&viewfull=1#post61800

[Astek777]

Hey Roxy

Had a go with Manual Mesh Levelling last night, and interesting enough doing a 2x2 grid produced pretty good results. I understand this works using a different method to auto bed levelling, but doesn't this prove the plane is at least flat and there's something else mis-configured/not working with the auto bed levelling?

Not sure whether any of the points I raised previously could have any implications?

* Is there anything that could be being loading from the EPROM memory that could be distorting the map?

* When the G29 is being completed I get 'Z endstop hit'...could this be stopping figures lower than the G28 Z-home position from being correctly registered?

* If I've got software max-stop points set and the nozzle position moves outside of these during probing, which mine does as the probe is 32mm in front (Y axis) of the extruder and the probe scans right to the back corners so the extruder is just about off the table at this point, would that cause any issues?

* If one of the offsets is set to '0' (my X offset is), is there anywhere in the code where this would read as empty and load some default value or cause a calculation error ('division by zero' or similar)?

[Roxy]

EDIT: Roxy, you might consider editing your first post as required to eliminate this ongoing confusion/frustration.

Agreed... I'll do that now... If you can think of anything else that should be added to the note, please speak up!

[Roxy]

Had a go with Manual Mesh Levelling last night, and interesting enough doing a 2x2 grid produced pretty good results. I understand this works using a different method to auto bed levelling, but doesn't this prove the plane is at least flat and there's something else mis-configured/not working with the auto bed levelling?

I think that is true.

Not sure whether any of the points I raised previously could have any implications?

* Is there anything that could be being loading from the EPROM memory that could be distorting the map?

Not if the EEPROM is turned off. And if the EEPROM is turned on, doing a M502 followed by a M500 should clear any bad values from the EEPROM.

* When the G29 is being completed I get 'Z endstop hit'...could this be stopping figures lower than the G28 Z-home position from being correctly registered?

The G29 command has always done that. It doesn't hurt anything. I believe has been corrected in the latest releases over at GitHub. But those releases are not fully baked and are not stable yet.

* If I've got software max-stop points set and the nozzle position moves outside of these during probing, which mine does as the probe is 32mm in front (Y axis) of the extruder and the probe scans right to the back corners so the extruder is just about off the table at this point, would that cause any issues?

That doesn't sound right. Just to get things going, I would suggest you shrink the defined bed size. You can also use the F B L R parameters to limit the size of the probe area. You would do something like G29 T n 4 V 4 F 50 B 125 L 50 R 125 You can try that and let us know what happens.

* If one of the offsets is set to '0' (my X offset is), is there anywhere in the code where this would read as empty and load some default value or cause a calculation error ('division by zero' or similar)?

I don't believe so. I don't think this is what you are fighting.

[Bob]

Hello all.
Well, I'm getting very frustrated. Hope someone can help me.

Here's my setup.
Prusa Mendal printer.
Arduino>BeckDac firmware.
Auto bed leveling.
Bed is 1/2" aluminum tooling plate. It's flat. On top of that is a 1/4" piece of cork. Then an aluminum heated bed, 24 volt. And, then a piece of boro glass that seems very flat.
Bed is held at 3 points on springs. 2 at the corner on right side and 1 in the center of the left side.
Probing is at 3, which gives 9 points.

Problem:
After running bed leveling it seems that most of the time the left side is too tight, by about 3 steps and the right side is too loose by a couple of steps. If I adjust for a good bead while printing the skirt then the rest of the print seems fine. It does it every time, no exceptions.
This is easier to read. Don't know what happened to the formatting??

Switch repeatability is very good.

Please tell me what you need from me to help solve my problem?

Bob Keyes

[Roxy]

Can you run the M48 command positioned over both the 'tight' area and the 'loose' area. It would be helpful to know those numbers.

[Bob]

Here you go. Looks good to me, but what do I know!

>>>m48
SENDING:M48 "Loose"
M48 Z-Probe Repeatability test. Version 2.00
Full support at: http://3dprintboard.com/forum.php
Mean: 17.065334
Standard Deviation: 0.005371
echo:endstops hit: Z:17.06
>>>m48
SENDING:M48 "Tight"
M48 Z-Probe Repeatability test. Version 2.00
Full support at: http://3dprintboard.com/forum.php
Mean: 16.394889
Standard Deviation: 0.009430
echo:endstops hit: Z:16.39