.Hi I'm new to github so please be patient - :). I got a home build rostock/kossel hybrid 3D delta printer all works well with Marlin v1 but as soon as I enable auto bed leveling I get a lot of errors - see below
Please can someone help and tell me what to do? I use Ramps with Arduino mega R3 and Arduino 1.5.0 compiler I searched the whole program to see about this "ABL_PROBE_PT_X" but no cigar am I missing something here

Regards Theo

Marlin_main.cpp: In function 'void set_bed_level_equation_3pts(float, float, float)':
Marlin_main.cpp:882: error: 'ABL_PROBE_PT_1_X' was not declared in this scope
Marlin_main.cpp:882: error: 'ABL_PROBE_PT_1_Y' was not declared in this scope
Marlin_main.cpp:883: error: 'ABL_PROBE_PT_2_X' was not declared in this scope
Marlin_main.cpp:883: error: 'ABL_PROBE_PT_2_Y' was not declared in this scope
Marlin_main.cpp:884: error: 'ABL_PROBE_PT_3_X' was not declared in this scope
Marlin_main.cpp:884: error: 'ABL_PROBE_PT_3_Y' was not declared in this scope
Marlin_main.cpp: In function 'void process_commands()':
Marlin_main.cpp:1540: error: 'ABL_PROBE_PT_1_X' was not declared in this scope
Marlin_main.cpp:1540: error: 'ABL_PROBE_PT_1_Y' was not declared in this scope
Marlin_main.cpp:1543: error: 'ABL_PROBE_PT_2_X' was not declared in this scope
Marlin_main.cpp:1543: error: 'ABL_PROBE_PT_2_Y' was not declared in this scope
Marlin_main.cpp:1546: error: 'ABL_PROBE_PT_3_X' was not declared in this scope
Marlin_main.cpp:1546: error: 'ABL_PROBE_PT_3_Y' was not declared in this scope

I found putting the nuts on the frame corners painful. Eventually I gave up on fingers and switched to pliers, but there has to be some way to make these easier to attach, like a partial nut trap to hold it in place while attaching the screw. Yes, this would reduce the thickness of the screw channel slightly, but a small detent from the partial nut trap might be enough to enable the easy use of fingers, rather than careful use of pliers.

Good Day Kind Sir,

I have printed your latest STLs for the Kossel printer.

The design is elegant. I think you are really on to something.

Might I recommend a version of the end effector without nut traps? It is my opinion that nut traps in this situation requires that the printer making the Kossel parts be very well calibrated.

I suggest that the nut traps be removed and the use of M3 nylock nuts be implemented instead.

This may help enable "less capable" RepStraps etc. to create useable printed Kossel parts; and ultimately increase the popularity of the design.

Thanks for posting your work publicly :)

Respectfully,

Adam Herring

in frame_motor.scad you use vertex(3*extrusion, idler_offset=0, idler_space=100);
as idler_space gets subtracted the height of the cone becomes -20.
This prevents me from loading the scad file into FreeCAD
Is it intended to work with a negative cone height?
Do you plan to change it in the future?

I found some open beam for a good price and i want to make the Kossel. BUT i found 20mm Openbeam.

What would it take to update the pieces to be more parametric like it says in the configuration file? i am happy to fork and work on it but im not 100% sure what all needs to happen as i am not yet very intimate with all of the code for this project. i am pretty good a openScad and would love to contribute. - how would we go about making this more parametric?

Anyone else have this problem? I'm using a SHCS on the stock slider, with ball rails.

Of course it's an easy fix, shifting the holes on the endstop piece or increasing its thickness or moving the hole on slider over, but I'd like to verify that there isn't something obvious that I'm missing.

I was able to get the motor screws started with a ball end hex driver, but then I had to finish with a regular right-angle allen wrench. This is even with button heads that give more space for the allen wrench. Making frame_motor a mm shorter on the top and bottom would reduce the angle and speed up assembly, as would tapering the inside edges of the enclosed trapezoid shape in frame_motor.

Hi Johann -
In initially printing my carriages a few weeks ago, I noticed that the inside edges of the top two screws was not well supported. The material there got sliced as a separate island with @ 0.4mm line width.

It looks like you have the same issue on the top right screw in this photo:
http://www.flickr.com/photos/jcrocholl/9003656246/sizes/o/in/photostream/

I fixed this by slightly reducing horn_x from 8.0 to 7.7. I committed it to my fork awhile back here:
jcdoll@77e6c4b

• joey

I'm very new to this but, I have my Kossel Mini up and running my only problem is it seems if I run the auto-level before I start printing it doesn't do anything because the extruder is running into the bed. From all the checking I've done my print bed is very level but if I put my extruder at 1mm above the print bed and move the extruder roughly 40mm in any direction X+, X-, Y+ or Y- it runs into the print bed. So either I have a convex lens for a printbed, which I doubt, because I have the same problem if I flip the bed around, or the motion of my printer is out of whack. Any ideas what's going on or how to fix this?

The circle cutout in frame_motor prints fine on the bottom but looks crappy on the top, because the overhangs become extreme. Since this hole is not needed for registering the the motor to the mount, an octagon or oval with truncated top & bottom might be better. Aesthetic only, I know.