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Bed Auto Leveling.. check this out

Posted by AlexBorro 
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:28PM
right after power up do M503 then M500 then only do bed leveling etc
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:31PM
Sorry M502 is the command to read the configuration.h values
so please use M502 then M500
Then you can check with M501 if the values in EEPROM are ok
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:33PM
If I undestand :
I make again the calibration (hotend+probe) process
and after I use M500 to store it in the eeprom ?
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:37PM
When you are doing calibration you should put your offset values into the configuration.h file
for examle:
#define X_PROBE_OFFSET_FROM_EXTRUDER -7.60
#define Y_PROBE_OFFSET_FROM_EXTRUDER -56.10
#define Z_PROBE_OFFSET_FROM_EXTRUDER -1.5

then after you power in the printer run M502 this will read the setting from configuration.h (which are the so called default values for you) and then store this values into the eeprom be using M500

take a look at this video [www.youtube.com]

Edited 1 time(s). Last edit at 02/13/2015 03:39PM by szabi.
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:39PM
ok , now it's more clear for me winking smiley
I try ...

Edited 1 time(s). Last edit at 02/13/2015 03:40PM by touchthebitum.
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:41PM
But I have to write down the line with Xcount or the first one ?
Both have different Z values...
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:46PM
Quote
touchthebitum
But I have to write down the line with Xcount or the first one ?
Both have different Z values...

I don't really get what you are talking about

1.- Please home all your axes
2.- Mark a place on your bed (preferred on the middle but it is not crucial)
3.- Manually jog your printer so that the tip of your nozzle will be above the marked point (now we do not care about Z high)
4.- execute G92 X0 Y0 Z0 (this will zero out all your axes)
5.- lift up your Z and make sure you are high enough then lover your Z probe by executing M401 (as you have servo enabled, i assume you are using a servo mounted Z probe, if not please let me know)
6.- jog your printer so that your switch's trigger is now above the marked point (again we do not care about Z high)
7.- Execute M114 (will read the axes position) and post me the output
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 03:55PM
x:-24.40 y:49.00 z:32 E:0.00 Count X:-24.40 y:49.00 z:32.00
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:03PM
Quote
touchthebitum
x:-24.40 y:49.00 z:32 E:0.00 Count X:-24.40 y:49.00 z:32.00

Use this values in your configuration.h file (YES, value sign is reversed!)

#define X_PROBE_OFFSET_FROM_EXTRUDER 24.40
#define Y_PROBE_OFFSET_FROM_EXTRUDER -49.10
#define Z_PROBE_OFFSET_FROM_EXTRUDER -32.0

then upload your firmware then use M502 then M500 then check the values with M501

If everything is OK start a test print
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:07PM
I should see these value after M501 ?
I don't see in the listing....
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:09PM
What firmware are you using?
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:12PM
Marlin 1.3.1
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:13PM
please attach your configuration.h
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:13PM
I tried with M501 but it prints in the air
What I don't understand is how the printer knows the hotend height ....we only made the probe calibration....
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:15PM
Quote
touchthebitum
I tried with M501 but it prints in the air
What I don't understand is how the printer knows the hotend height ....we only made the probe calibration....


It calculates from the Z home position and the Z offset.
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:16PM
Here it is winking smiley
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Attachments:
open | download - Configuration.h (30.9 KB)
szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:23PM
A ok, sorry :-) please do the calibration for the hot and as well

1.- Please home all your axes
2.- Move the axes wherever you wish
3.- Put a thin sheet of paper on your bed
4.- Manually jog your printer carefully so that the tip of your nozzle touches the paper
5.- Execute M114 (will read the axes position) and post me the output
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:33PM
So, I made auto home for homing axes and made the calibration with the paper
x:83.00 y:154 z:15.20
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szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:36PM
Quote
touchthebitum
So, I made auto home for homing axes and made the calibration with the paper
x:83.00 y:154 z:15.20

using -15.2 for Z offset hopefully will do the trick

#define Z_PROBE_OFFSET_FROM_EXTRUDER -15.2
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:47PM
always printing in the air ......
I don't understand
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:50PM
When I make M114 , I get this :
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Attachments:
open | download - marlin i3 hphestos.jpg (416.2 KB)
szabi
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:58PM
Quote
touchthebitum
always printing in the air ......
I don't understand

it looks like your offset values are all 0.
Try disabling EEPROM feature for now , you can play later with eeprom features but is is not needed for bed leveling.

I need to go now......
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 04:59PM
thanks for the great support winking smiley
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 13, 2015 05:03PM
it's incredible, all offset values are 0
I disabled eeprom support and it's the same.....
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 14, 2015 12:14PM
Hello!
Today I noticed a strange behaviour.
After G28, I see 15mm on my LCD
When the probe makes the 4-points bed calibration, I see for example : 26.98 mm(down left) 26.73mm (down right) 26.45mm (top right) (top left didn't see it)
There are about 10mm .....
When I make G1 Z0 m hotend goes well on the paper.
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 15, 2015 09:50AM
Hello!
Can someone help me, I'm desperate....

Autolevelling problem


My printer prints on air and I did 20x the github process ....

What's wrong?
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Brainscan
Re: Bed Auto Leveling.. check this out
February 15, 2015 11:32AM
Have you disabled the min software end stops? If you haven't it will air print. Also if you have EEPROM on you should try M502 followed by M500.
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touchthebitum
Re: Bed Auto Leveling.. check this out
February 15, 2015 11:33AM
Hello!
Already done.....
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Brainscan
Re: Bed Auto Leveling.. check this out
February 15, 2015 02:10PM
If you send M114 does it show the nozzle at Z0? If you then manually move the nozzle down to the bed and send M114 again where does it say it is? Can you post you configuration.h file please
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Brainscan
Re: Bed Auto Leveling.. check this out
February 15, 2015 02:12PM
You'll also want to do something about your probe, it's twitching more than I'd want it too. You should think about a capacitance probe it's much easier with no moving parts.
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