Dual Head Calibrate

thingiverse

I have upgraded the design and it is complete with no suffixes. Overall it is a bit bigger, so it is simpler to gauge. Additionally, the X and Y axes are labeled with letters and positive/negative text for direction. The cross is printed as before by the first extruder, and the corner squares are printed by the second extruder. Apart from measuring between the square and crosses you can also detect if the round edges align perfectly. When properly calibrated they should be flush from both extruders. The second extruder's output just sits on top of the first extruder's output. Consequently any X-Y misalignment will not cause a breakdown (up to 5 mm). You can gauge the position of the four squares against the central cross with digital calipers (they stick up enough). Print Settings Printer: Spiderbot Rafts: No Supports: No Resolution: 0.2mm Infill: 100% Notes: On my printer, the initial section after an extruder switch is slightly blobby. Either you prefer all of it on one corner (restricting measurement to the others, but at least one corner should be sufficient) so set the slicer to a random start point or same corner when initiating a new layer accordingly. Post-Printing Measuring Determine the distance between turquoise and purple arrows on green edges. If they are not equal, then you have misalignment on the corresponding axis. Final visual/finger feel (refer to red arrows) misallignment if the "corners" are not flush with the baseplate (see top picture for proper alignment). How I Created This It was a simple and straightforward design job. The primary purpose is that it should not cause problems even when misaligned (ie trying to fill a hole but missing it would print twice in the same spot...). OpenScad source uploaded. Instructions Prints with two extruders. The second extruder's output just sits on top of the first extruder's output. Thus any X-Y misalignment will not cause any issues. You can gauge the position of the red squares against the gray cross with digital calipers (they stick up enough). Then you know how much to input in the X.Y offset of your second extruder to achieve perfect alignment. The two STL files are for Left and Right extruder. The OpenScad file - just enter L, R or B in the first parameter to view Left, Right or both views.