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Bed height map, printhead going all the way up to come back down when probing.

poly3dpoly3d
in Questions & Answers
Hi!
I recently bought a Hatchbox Alpha printer and flashed it with a Repetier firmware without knowing much about neither Repetier nor Delta printers. I had some experience with my cartesian type printers which are using Marlin for a firmware.

After few days of trial and error I got the printer to move around without issues, no skipping steps, homing properly, display and yada yada.
But I cannot get the bed map to work properly for me, whenever I try using a bed map tool in Repetier Host it touches the bed, goes all the way up and back down, it does that for every test point, one of the towers hits an endstop and goes back down.

In addition to that, my (printable) printbed radius is about 145mm so for the test area I put x min -116
x max 116
Y min -116
Ymax 116
7 probe points
Do these seem right to you? Because the nozzle gets beyond the perimeter of my printbed and then I just turn it off to avoid breaking anything. It also looks like the pattern of the probing is rectangular and doesn't quite cover entire bed but maybe a half of it.

Also when using a command G32 with an Autoleveling set to 0 I get triangular probing but with it set to 1 it goes beyond the bed and acts just like the bed map tool.
I can however successfully use autolevelinf set to 1 with a G33 command. It's all new to me and I'm probably mixing too much stuff together.

Can you please help me getting my head around this and tell me what I am doing wrong here?

Comments

  • RepetierRepetier
    First probing goes back to where it started, so the trick is to start near bed so it probes much faster.

    Then you have defined a z probe offset. That is the sport relative to your carrier center where z probe sits. While probing your nozzle position gets switched by this position so it can go more to one side then the other. You need to consider this when setting the probing rectangle.

    G32 and G33 are independ and also independent defined. G32 uses z probe points and measuring method to determine how to run G32, see online config tool for more details.
    G33 is configured in config tool only with positions. Here you can omit edges for deltas to allow a wider rectangular.

    Hope this helps you to find the correct solution.

  • poly3dpoly3d
    Thank you for the reply.
    I will try it out today because I didn't have time yet.

    When it comes to a Z Probe offset, is the offset in XY plane? Or is it a height? My delta uses 3 pressure switches underneath printbed which are connected to a little PCB with an atmel chip on it, that is later connected to a Rumba board, does that play the same function as a Z probe? Should it be configured any different?

    And as far as the G32 & G33 go, is using only G33 sufficient enough to probe the bed once, save the correction factors in EEPROM and theoreticaly not worry about it later?

    Is there a Wiki on those G-code commands so I could read up on it?
  • RepetierRepetier
    With your force feedback sensors you have no offsets - all 0. Only thing to watch out is ooze on nozzle which can cause wrong heights. So make sure it is clean or hot.

    G33 stores bumps/correction in eeprom so as long as you do not change bed/other parts it is not needed to redo.

    www.reprap.org -> gcodes shows all gcodes in more detail. Repetier.ino contains all commands implemented in repetier.
  • poly3dpoly3d
    Thank you very much! I will try that tonight!
  • poly3dpoly3d
    I'm having a hard time configuring my printer to make it use a z correction. 
    After I run G33 and it stores the correction matrix in EEPROM I cannot use bed Height map tool, because it probes few spots and crashes, is the correction offsetting the probing too much?

    Is there any way to adjust individual z correction spots? I know that Marlin's bed mesh leveling has an option of adjusting single points. 
    Is there any way to adjust a Z offset in Repetier? 

    Also I flashed the firmware back to Hatchbox's one to see if it acts any different and there is a slight improvement when using stock firmware, but I cannot modify it since I just have a .hex file from them. Is it possible that I measured something wrong when was setting up the firmware on my own and it's throwing it off?


  • RepetierRepetier
    You can see your distortion map with G33 L0. It returns a list of G33 commands to write exactly that map back again. So you can change these command also to store different heights for each point.

    That said what has distortion map to do with height map working or not? And what is the error message when host crashes during height map or does the head crash from wrong testing area? That's not clear. Probing activates z probe xy offset so area must be reachable when that is the case.

    For correcting simple bed rotation use G32 S2 not G33. G33 is for fixing bumps or nonplanar shape.

  • poly3dpoly3d
    I want to use the height map to have a visual of what the corrected plane looks like after applying the correction so I could compare it with the non-corrected (just like in your video).
    I notice that after the correction is applied the nozzle lifts a little less when probing than without it and at few points it doesn't even lift off the bed.
    I tried printing with the correction applied and it acts weird, so I wanted to modify single points (whichever causes probing to crash)

    I will try doing it again later in the day to tell you what exact error is displayed.
  • poly3dpoly3d
    I think that I know where my problem lies but I am not sure how to fix it...

    I think that dimensions I entered are off by fractions and it keeps me from probing right. 
    I observed that when I calibrated my endstop offsets using a rod, the nozzle wasn't exactly centered between three towers, so I jogged them to the exact center and sent G132 S2 to save new offsets which would put my nozzle in dead center. I'm not sure if using rods is a good idea for me with a sheet metal cover which can be off quite a lot.

    After I got my endstops corrected I started checking the movements close to a surface of the printbed and they don't seem to be consistent, I tested it with a piece of paper and with X0 and Y0 I got these results close to the towers:

    Tower X +1.15
    Tower Y +0.80
    Tower Z -1.85

    I have read that either tower rotation can be wrong, or the ROD_RADIUS being off can cause improper movements, but what if they are both messed up? Where do I start? Should I concentrate on either one of these first? or try adjusting them simultaneously? I'm very sorry for asking dummy questions here but I ran out of clues and this whole Delta printer becomes a nightmare for me. 

    These are my EEPROM settings:

    READ: EPR:0 1028 0 Language

    READ: EPR:2 75 115200 Baudrate

    READ: EPR:3 129 2.502 Filament printed [m]

    READ: EPR:2 125 7277 Printer active [s]

    READ: EPR:2 79 0 Max. inactive time [ms,0=off]

    READ: EPR:2 83 360000 Stop stepper after inactivity [ms,0=off]

    READ: EPR:3 11 100.0000 Steps per mm

    READ: EPR:3 23 300.000 Max. feedrate [mm/s]

    READ: EPR:3 35 80.000 Homing feedrate [mm/s]

    READ: EPR:3 39 20.000 Max. jerk [mm/s]

    READ: EPR:3 133 0.000 X min pos [mm]

    READ: EPR:3 137 0.000 Y min pos [mm]

    READ: EPR:3 141 0.000 Z min pos [mm]

    READ: EPR:3 145 155.000 X max length [mm]

    READ: EPR:3 149 155.000 Y max length [mm]

    READ: EPR:3 153 354.600 Z max length [mm]

    READ: EPR:1 891 70 Segments/s for travel

    READ: EPR:1 889 180 Segments/s for printing

    READ: EPR:3 59 1000.000 Acceleration [mm/s^2]

    READ: EPR:3 71 1000.000 Travel acceleration [mm/s^2]

    READ: EPR:3 881 356.500 Diagonal rod length [mm]

    READ: EPR:3 885 174.000 Horizontal rod radius at 0,0 [mm]

    READ: EPR:3 925 147.000 Max printable radius [mm]

    READ: EPR:1 893 0 Tower X endstop offset [steps]

    READ: EPR:1 895 97 Tower Y endstop offset [steps]

    READ: EPR:1 897 184 Tower Z endstop offset [steps]

    READ: EPR:3 901 210.000 Alpha A(210):

    READ: EPR:3 905 330.000 Alpha B(330):

    READ: EPR:3 909 90.000 Alpha C(90):

    READ: EPR:3 913 5.000 Delta Radius A(0):

    READ: EPR:3 917 0.500 Delta Radius B(0):

    READ: EPR:3 921 0.000 Delta Radius C(0):

    READ: EPR:3 933 0.000 Corr. diagonal A [mm]

    READ: EPR:3 937 0.000 Corr. diagonal B [mm]

    READ: EPR:3 941 0.000 Corr. diagonal C [mm]

    READ: EPR:3 1024 0.000 Coating thickness [mm]

    READ: EPR:3 808 0.100 Z-probe height [mm]

    READ: EPR:3 929 4.000 Max. z-probe - bed dist. [mm]

    READ: EPR:3 812 5.000 Z-probe speed [mm/s]

    READ: EPR:3 840 150.000 Z-probe x-y-speed [mm/s]

    READ: EPR:3 800 0.000 Z-probe offset x [mm]

    READ: EPR:3 804 0.000 Z-probe offset y [mm]

    READ: EPR:3 816 -116.910 Z-probe X1 [mm]

    READ: EPR:3 820 -67.500 Z-probe Y1 [mm]

    READ: EPR:3 824 116.910 Z-probe X2 [mm]

    READ: EPR:3 828 -67.500 Z-probe Y2 [mm]

    READ: EPR:3 832 0.000 Z-probe X3 [mm]

    READ: EPR:3 836 116.910 Z-probe Y3 [mm]

    READ: EPR:3 1036 0.090 Z-probe bending correction A [mm]

    READ: EPR:3 1040 0.000 Z-probe bending correction B [mm]

    READ: EPR:3 1044 0.650 Z-probe bending correction C [mm]

    READ: EPR:0 880 0 Autolevel active (1/0)

    READ: EPR:3 976 0.000 tanXY Axis Compensation

    READ: EPR:3 980 0.000 tanYZ Axis Compensation

    READ: EPR:3 984 0.000 tanXZ Axis Compensation

    READ: EPR:0 106 0 Bed Heat Manager [0-3]

    SENT: M105

    READ: EPR:0 107 255 Bed PID drive max

    READ: EPR:0 124 80 Bed PID drive min

    READ: EPR:3 108 196.000 Bed PID P-gain

    READ: EPR:3 112 33.000 Bed PID I-gain

    READ: EPR:3 116 290.000 Bed PID D-gain

    READ: EPR:0 120 255 Bed PID max value [0-255]

    READ: EPR:0 1020 0 Enable retraction conversion [0/1]

    READ: EPR:3 992 3.000 Retraction length [mm]

    READ: EPR:3 1000 40.000 Retraction speed [mm/s]

    READ: EPR:3 1004 0.000 Retraction z-lift [mm]

    READ: EPR:3 1008 0.000 Extra extrusion on undo retract [mm]

    READ: EPR:3 1016 20.000 Retraction undo speed

    READ: EPR:3 200 95.000 Extr.1 steps per mm

    READ: EPR:3 204 50.000 Extr.1 max. feedrate [mm/s]

    READ: EPR:3 208 20.000 Extr.1 start feedrate [mm/s]

    READ: EPR:3 212 5000.000 Extr.1 acceleration [mm/s^2]

    READ: EPR:0 216 3 Extr.1 heat manager [0-3]

    READ: EPR:0 217 230 Extr.1 PID drive max

    READ: EPR:0 245 40 Extr.1 PID drive min

    READ: EPR:3 218 7.0000 Extr.1 PID P-gain/dead-time

    READ: EPR:3 222 0.8200 Extr.1 PID I-gain

    READ: EPR:3 226 43.9100 Extr.1 PID D-gain

    READ: EPR:0 230 255 Extr.1 PID max value [0-255]

    READ: EPR:2 231 0 Extr.1 X-offset [steps]

    READ: EPR:2 235 0 Extr.1 Y-offset [steps]

    READ: EPR:2 290 0 Extr.1 Z-offset [steps]

    READ: EPR:1 239 1 Extr.1 temp. stabilize time [s]

    READ: EPR:1 250 150 Extr.1 temp. for retraction when heating [C]

    READ: EPR:1 252 0 Extr.1 distance to retract when heating [mm]

    READ: EPR:0 254 255 Extr.1 extruder cooler speed [0-255]



  • RepetierRepetier
    Your eeprom shows bending correction values != 0. For delta this is normally 0 and will inflence measured z probe values in a wrong way if not 0. It is more for cantilevered beds with mechanical probe that will bend bed while probing.

    G131/G132 is just to reduce inital errors the most possible. With all these nonlinear dependencies each error introduces shifts over build volume. So take what you think is most appropriate to make it center inside the 3 colums. Most of the error gets corrected by rotating bed software side.

    Disable be ddistortion at first - this is to fix last connection problems with bed and not to fix all configuration errors. Only when you get not closer with calibrating geometry use it.

    diagonal rod/horizontal radius fix a 3xsymmetric dome from center to outside, measurements near colums are not really changed by this. These should be nearly correct after G32 S2 ony error towards center where it might go up or down gets changed by canging the ratio. Since diagonal is quite good to measure you normally modify horizontal radius here.

    Net big changer are the 3 angles. Most deltas never get exactly 120° and even a difference of 0.1° changes height map.

    You could try
    to compute good updates (not tested by me but some users say it worked).
  • poly3dpoly3d
    Thank you, I will take the bending correction out, I thought it could be implemented in deltas. My bed sits on a layer of some type insulation, underneath that insulation are located 3 sensors, I thought that maybe I could fix for the flex in the insulation by applying bending correction, but if it's likely to cause problems I will zero them out.

    G131 doesn't seem to do anything for me, I think it just assumes it's in the center as is.

    As far as the dissortion goes I usually disable it using M323 S0 P0, I just can't calibrate everything else. I will start from scratch today and hopefully will have more luck. I tried adjusting the 3 angles yesterday and printing a giant circle near the perimeter of the bed to see where the changes were supposed to be made. But the more I was messing with it, the more I was messing it up.
  • RepetierRepetier
    You are partially right with bending correction if you have force feedback. But it assumes bending to be a linear function of position and that will not be the case for you.

    G131 does nothing if extruder offset is 0,0 from center. Quite normal for single extruder deltas.

    Last tip: Don't deviate too much from your theoretical values you know quite well. Optimizations can go in wrong directions into so called local minima. Means you can measure diagonal length +/-1mm max should be precise enough. Angles will also be close to 120°. Depending on your solution it would be +/-1° or < +/-5° which you have to decide. Measuring distance between columns gives you some hints since it should be symmetric and hence have same distance which is easier to measure then angles.
  • poly3dpoly3d
    I got the angles pretty close to what it should be, my only concern is that I have as much as 2.25º correction between two towers and it is a pretty well built printer I believe. I tested the angle correction by printing a single layer giant circle about 15mm wide along the perimeter of the printbed, and observed how tight or loose the nozzle was getting in relation to the bed.

    I got it pretty close , but I still plan a little fine adjusting, by far I was changing the values by 0.25º increments, I will go a little finer and check how does the cente of the bed looks like in relation to the perimeter, just to see if I have any dishing in the middle.
  • mkirbymkirby
    I noticed in your EEPROM dump, your radius is different than that of the Hatchbox config.
    yours: 174.000 Horizontal rod radius at 0,0
    theirs: #define ROD_RADIUS 176.5

    more can be found on my fork, I hope this helps:
  • poly3dpoly3d
    When I changed the ROD_RADIUS to 176.5 I was getting a dishing effect.

    174 is what I measured myself and it took care of the dishing effect. I printed pretty close to a flat plane with 174mm, but when changed to 176.5mm the head would sink approx 2mm in the center.
  • mkirbymkirby
    I'm attempting to print a one layer disc, so far so good. I'll post more pictures here.

    SENDING:M205

    EPR:0 1028 0 Language
    EPR:2 75 115200 Baudrate
    EPR:3 129 620.835 Filament printed [m]
    EPR:2 125 425733 Printer active [s]
    EPR:2 79 0 Max. inactive time [ms,0=off]
    EPR:2 83 360000 Stop stepper after inactivity [ms,0=off]
    EPR:3 11 100.0000 Steps per mm
    EPR:3 23 300.000 Max. feedrate [mm/s]
    EPR:3 35 40.000 Homing feedrate [mm/s]
    EPR:3 39 20.000 Max. jerk [mm/s]
    EPR:3 133 0.000 X min pos [mm]
    EPR:3 137 0.000 Y min pos [mm]
    EPR:3 141 0.000 Z min pos [mm]
    EPR:3 145 155.000 X max length [mm]
    EPR:3 149 155.000 Y max length [mm]
    EPR:3 153 350.817 Z max length [mm]
    EPR:1 891 70 Segments/s for travel
    EPR:1 889 180 Segments/s for printing
    EPR:3 59 1000.000 Acceleration [mm/s^2]
    EPR:3 71 1000.000 Travel acceleration [mm/s^2]
    EPR:3 881 356.500 Diagonal rod length [mm]
    EPR:3 885 176.500 Horizontal rod radius at 0,0 [mm]
    EPR:3 925 151.000 Max printable radius [mm]
    EPR:1 893 0 Tower X endstop offset [steps]
    EPR:1 895 0 Tower Y endstop offset [steps]
    EPR:1 897 0 Tower Z endstop offset [steps]
    EPR:3 901 210.000 Alpha A(210):
    EPR:3 905 330.000 Alpha B(330):
    EPR:3 909 90.000 Alpha C(90):
    EPR:3 913 0.000 Delta Radius A(0):
    EPR:3 917 0.000 Delta Radius B(0):
    EPR:3 921 0.000 Delta Radius C(0):
    EPR:3 933 0.000 Corr. diagonal A [mm]
    EPR:3 937 0.000 Corr. diagonal B [mm]
    EPR:3 941 0.000 Corr. diagonal C [mm]
    EPR:3 1024 0.000 Coating thickness [mm]
    EPR:3 808 -0.100 Z-probe height [mm]
    EPR:3 929 10.000 Max. z-probe - bed dist. [mm]
    EPR:3 812 2.000 Z-probe speed [mm/s]
    EPR:3 840 120.000 Z-probe x-y-speed [mm/s]
    EPR:3 800 0.000 Z-probe offset x [mm]
    EPR:3 804 0.000 Z-probe offset y [mm]
    EPR:3 816 -116.910 Z-probe X1 [mm]
    EPR:3 820 -67.500 Z-probe Y1 [mm]
    EPR:3 824 116.910 Z-probe X2 [mm]
    EPR:3 828 -67.500 Z-probe Y2 [mm]
    EPR:3 832 0.000 Z-probe X3 [mm]
    EPR:3 836 135.000 Z-probe Y3 [mm]
    EPR:3 1036 0.000 Z-probe bending correction A [mm]
    EPR:3 1040 0.000 Z-probe bending correction B [mm]
    EPR:3 1044 0.000 Z-probe bending correction C [mm]
    EPR:0 880 1 Autolevel active (1/0)
    EPR:0 106 0 Bed Heat Manager [0-3]
    EPR:0 107 255 Bed PID drive max
    EPR:0 124 80 Bed PID drive min
    EPR:3 108 196.000 Bed PID P-gain
    EPR:3 112 33.000 Bed PID I-gain
    EPR:3 116 290.000 Bed PID D-gain
    EPR:0 120 255 Bed PID max value [0-255]
    EPR:0 1020 0 Enable retraction conversion [0/1]
    EPR:3 992 3.000 Retraction length [mm]
    EPR:3 1000 40.000 Retraction speed [mm/s]
    EPR:3 1004 0.000 Retraction z-lift [mm]
    EPR:3 1008 0.000 Extra extrusion on undo retract [mm]
    EPR:3 1016 20.000 Retraction undo speed
    EPR:3 200 95.000 Extr.1 steps per mm
    EPR:3 204 200.000 Extr.1 max. feedrate [mm/s]
    EPR:3 208 20.000 Extr.1 start feedrate [mm/s]
    EPR:3 212 5000.000 Extr.1 acceleration [mm/s^2]
    EPR:0 216 3 Extr.1 heat manager [0-3]
    EPR:0 217 230 Extr.1 PID drive max
    EPR:0 245 40 Extr.1 PID drive min
    EPR:3 218 7.0000 Extr.1 PID P-gain/dead-time
    EPR:3 222 2.0000 Extr.1 PID I-gain
    EPR:3 226 40.0000 Extr.1 PID D-gain
    EPR:0 230 255 Extr.1 PID max value [0-255]
    EPR:2 231 0 Extr.1 X-offset [steps]
    EPR:2 235 0 Extr.1 Y-offset [steps]
    EPR:2 290 0 Extr.1 Z-offset [steps]
    EPR:1 239 1 Extr.1 temp. stabilize time [s]
    EPR:1 250 185 Extr.1 temp. for retraction when heating [C]
    EPR:1 252 5 Extr.1 distance to retract when heating [mm]
    EPR:0 254 255 Extr.1 extruder cooler speed [0-255]

  • poly3dpoly3d
    I'd love to see the disc!

    Mine with stock settings is not even possible to print, it prints 2mm high in the air in one spot and dips a lot in the other, so much that it skips teeth. 
    And that's only printing around the perimeter.

    How is working on the firmware going? Are you fully satisfied with your Alpha Hatchbox branch on GitHub?
  • mkirbymkirby
    edited September 2016
    I did a factory rest (M502), then level (G32 S0), then distortion correction (G33), then printed the disc again.
    After several loops I canceled the job and dumped the EEPROM (M205). I did a diff between your previous dump and here are only the lines with differences:

    (Mine)
    EPR:3 35 40.000 Homing feedrate [mm/s]
    EPR:3 153 351.123 Z max length [mm]
    EPR:3 885 176.500 Horizontal rod radius at 0,0 [mm]
    EPR:3 925 151.000 Max printable radius [mm]
    EPR:1 895 0 Tower Y endstop offset [steps]
    EPR:1 897 0 Tower Z endstop offset [steps]
    EPR:3 913 0.000 Delta Radius A(0):
    EPR:3 917 0.000 Delta Radius B(0):
    EPR:3 808 -0.100 Z-probe height [mm]
    EPR:3 929 10.000 Max. z-probe - bed dist. [mm]
    EPR:3 812 2.000 Z-probe speed [mm/s]
    EPR:3 840 120.000 Z-probe x-y-speed [mm/s]
    EPR:3 836 135.000 Z-probe Y3 [mm]
    EPR:3 1036 0.000 Z-probe bending correction A [mm]
    EPR:3 1044 0.000 Z-probe bending correction C [mm]
    EPR:0 880 1 Autolevel active (1/0)
    EPR:3 204 200.000 Extr.1 max. feedrate [mm/s]
    EPR:3 222 2.0000 Extr.1 PID I-gain
    EPR:3 226 40.0000 Extr.1 PID D-gain
    EPR:1 250 185 Extr.1 temp. for retraction when heating [C]
    EPR:1 252 5 Extr.1 distance to retract when heating [mm]

    (yours)
    EPR:3 35 80.000 Homing feedrate [mm/s]
    EPR:3 153 354.600 Z max length [mm]
    EPR:3 885 174.000 Horizontal rod radius at 0,0 [mm]
    EPR:3 925 147.000 Max printable radius [mm]
    EPR:1 895 97 Tower Y endstop offset [steps]
    EPR:1 897 184 Tower Z endstop offset [steps]
    EPR:3 913 5.000 Delta Radius A(0):
    EPR:3 917 0.500 Delta Radius B(0):
    EPR:3 808 0.100 Z-probe height [mm]
    EPR:3 929 4.000 Max. z-probe - bed dist. [mm]
    EPR:3 812 5.000 Z-probe speed [mm/s]
    EPR:3 840 150.000 Z-probe x-y-speed [mm/s]
    EPR:3 836 116.910 Z-probe Y3 [mm]
    EPR:3 1036 0.090 Z-probe bending correction A [mm]
    EPR:3 1044 0.650 Z-probe bending correction C [mm]
    EPR:0 880 0 Autolevel active (1/0)
    EPR:3 204 50.000 Extr.1 max. feedrate [mm/s]
    EPR:3 222 0.8200 Extr.1 PID I-gain
    EPR:3 226 43.9100 Extr.1 PID D-gain
    EPR:1 250 150 Extr.1 temp. for retraction when heating [C]
    EPR:1 252 0 Extr.1 distance to retract when heating [mm]

  • mkirbymkirby
    edited September 2016
    I'd love to see the disc!Mine with stock settings is not even possible to print, it prints 2mm high in the air in one spot and dips a lot in the other, so much that it skips teeth. And that's only printing around the perimeter. How is working on the firmware going? Are you fully satisfied with your Alpha Hatchbox branch on GitHub?


    Check out the disc here: https://goo.gl/photos/94cafbDHN35J4zMDA

    I've been using my Hatchbox Alpha branch (in my fork) and haven't found any issues so far, all I've been doing lately is just enabling/disabling features to see if anything breaks. I'll push my config changes now that I've done this bit of testing.

  • poly3dpoly3d
    I'm sorry for getting back late, I'm not getting notified on my email about any updates on this thread, I don't know if that's normal or not.

    I cannot enlarge the picture, but I can see a thumbnail which definitely looks better than the results I am getting. 

    I will change my settings to exactly what you are running and give it a try, I think I did that a few times when I flashed it with what I downloaded directly from GitHub (the AlphaHatchboxConfiguration.h) not the stock one, but the results were not satisfying. Not to say that there is anything wrong with your settings, apparently they work fine for you. I think it's just something wrong with my printer, or one of the dimensions is slightly off.



  • poly3dpoly3d
    edited September 2016
    Also, I find it interesting that you don't need any endstop offset, even the slightest fraction of a mm might need a few steps. 

    Or maybe my endstops just are not set right, I will see if they all activate at the same time with a nozzle centered out. 
  • mkirbymkirby
    edited September 2016
    I just changed my notification preferences up at the top where my profile is, I had to check the boxes to email me when comments are made on discussions.
  • mkirbymkirby
    I just pushed a change to the AlphaHatchboxConfiguration.h to enable software leveling by default.
  • poly3dpoly3d
    So I tried using your exact settings and the outcome is unacceptable, I have it printing 1.5mm up in the air between X&Z towers and pushing very hard by the Y tower. 
    Here is a picture of an outline:

    (hope you can open it)



  • mkirbymkirby
    Sorry to hear the the setting changes didn't help. Can you post the gcode file?
  • poly3dpoly3d
    Finally after few weeks of tries and errors I got the first layer almost perfect!

    The only problem I experience now is that when printing a 20mm x 20mm tower in "vase mode", I cannot get sidewalls perfectly flat, they seem to have some sort of small waves, I can see them when lining the model up with a straightedge and I feel them when moving a finger accross the sidewall going up and down. I printed the same model on my cartesian type printer and it came out perfect so I know it is possible to print such thing without these waves.
    Can anyone suggest what is wrong with it? Do you think I should just open a new thread for this?
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