Dualstrustion nozzle leveling Fixture
by einer_designs, published
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Allows you to level your dual nozzles on replicator
After disassembling my extrustion heads after a clog, I found that restoring the nozzles to the same height is next to impossible. Makerbot industries said the only way to level them is to return the assembly to them..Well I don't own anyting I can't fix. Where will I be if I am in a middle of a critical job!!
The main issue stems from the fact that the extruder bar is threaded where it accepts the nozzle(part #MP2590 if you have downloaded replicator part files). As well as having a nut at the top and bottom of the nozzle...This many threaded parts makes getting the level and orentation right next to impossible....I beleive that the top and bottom nuts will work as jam nuts and fix the extruder nozzle in place, if tightened properly, making the threaded bar redundant.
To fix this I machined a new mounting bar (MP 2590) with the holes NOT threaded (I used a 6 mm hole this left a little slop you might try smaller to get better alignment). You may just drill out you existing mounting bar (careful a replacment might be hard to get), I wanted to presserve mine in case I had to go back for some reason.
I still needed a reference to level the nozzles on my new mounting bar. I designed this simple fixture that allowed me to get them within .001 inch.
You simply adjust the top and bottom nuts until you get the nozzles level (use feeler guages to measure the gap between the nozzle and fixture). Make sure you really tighten the nuts against each other such that they do not losen.
You will have to recalibrate the nozzles offset. The calibration routine on your replicator should allow for this.
The only risk I see with this change is that the nuts ?may? loosen over many heat cycles, if the nuts are tightened enough this should not happen. So far I have not had a problem with this.
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Dualstrustion nozzle leveling Fixture by einer_designs is licensed under the Creative Commons - Attribution license.
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