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3Diddy: Agreed: My suggestion of an "arc guide" was aimed to reduce the melted area. I think lasers are used for the metal powder 3D printers, but quite expensive even with using high temp ovens to heat up the base material (so you only need to add a little extra energy with the laser to melt the metal. When someone comes up with a cheap powerful laser it will revolutionise the world! (and probab
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dgm3333
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Reprappers
Zach (?from Makerbot) tried a variety of rubber wheels a few years ago. I thought they worked, but not sure why they aren't used now. Possibly wear on the wheel or metal teeth had superior grip.
There is a drop-in replacement for the 8mm hobbed bolt with hyena-cuts (the 'hyena hobbed bar') also on the web site.
I'm using the "mini" (which is actually larger diameter) because I wanted to increas
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dgm3333
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Reprappers
I get size change from bottom to top depending on cooling, and when I had cooling from one side rather than 360deg this also created distortions. How are your fan/s directed?
David
by
dgm3333
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Reprappers
After some independent advice.
I just bought a hyena mini extruder drive gear. The website shows a nice photo with apparently even teeth and in particular states the design eliminates orphan teeth (ie irregularities in the pattern which may cause slight errors in extrusion likely to occur at the last tooth cut around the circumference).
At a quick glance, it looks the same as the photo. The teeth
by
dgm3333
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Reprappers
I still stand by TIG.
Welding is messy because it's hard for a beginner to keep the spark gap constant. A robot (think printer) should manage this fine. TIG is inately cleaner than MIG.
TIG does already have a gas system, but I think it would be unnecessary extra weight on the carriage to have to drag the gas line around, thus my reason for separating it from the 1ary electrode electrical line a
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dgm3333
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Reprappers
Extruding is probably difficult. However printing objects in aluminium (or any other metal) should be childs play to do if you throw away the "extruding" mentality:
I would buy an off the shelf TIG welder (prices start at £150) and rig a Zirconium-tungsten electrode and wire guide to be moved by steppers in 3D. This would eliminate the problems with reacting/damaging the chamber or measuring tem
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dgm3333
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Reprappers
My question is, when people get optimal output, how deeply to the teeth of the drive gears bite=cut into the filament to get maximum extrusion force without slipping or breaking? I'm wondering if there is an optimal 'bite depth'. I'm using 3mm ABS filament, but also plan to try nylon at some stage, so any info for this too.
I'm about to print a new extruder body to make use of a hyena-mini.
I've
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dgm3333
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Reprappers
Try detergent as a wetting agent and a kitchen squeegee instead of a paint brush!
My mix is caster sugar 10g:water 100ml:detergent 1 drop, but it’s “4x concentration,” so probably roughly equivalent to 4 drops of normal detergent. Temperature 90-95deg C. Use a torch or toothpick to check the coating consistency and thickness if desired.
The rest of the post just expands on my findings, so don’t b
by
dgm3333
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Reprappers
I've now figured out what was happening with the random location errors, and it still does it with v0.85b
Repetier is incorrectly sending relative moves to the board after a G92 location reset:
The following is a copy of the output log.
***Pressing the DOWN 0.1mm DOES cause an error in movements after a G92 reset***
Reset onboard Z location to +10 with G92:-
13:27:31.312 : N4313 G92 Z10 *124
13
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dgm3333
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Repetier
Hi Development Team
I've just tested with Windows version 0.85b and the same behaviour occurs as with Linux v0.85c.
Forgot to mention I'm running Marlin on my Sanguinolulu, Linux flavour is Ubuntu, and Windows is XP. Don't think that should make a difference though.
Cheers
David
---------- Forwarded message ----------
From: David Mckenzie
Date: 2 June 2013 08:25
Subject: v0.85c Linux location
by
dgm3333
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Repetier
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