This airfoil is 260mm high and it prints reliable without support. I simply used a wide brim on LokBuild print surface and made sure the nozzle didn't scratch on the latest layer. ( minimal underextrusion of 95% )by o_lampe - Slic3r
To bad you can't feed the MKS bords from the RasPi. AFAIR, it's 5V regulator is much beefier than the faintharded Arduino stuff.by o_lampe - Stepper Motors, Servo Motors, DC Motors
I thought about that angle too. It changes with Z-position. A CV-joint at the far end of the stepper shaft would help. Shop for 4WD RC-car-spareparts, you'll sure find plenty. BTW: Why not use the extruder-motor as counterweight?by o_lampe - General New Machines Topics
Interesting numbers! But torsional forces are not neglectible, when you mount the extruder to one side of the Y-beam/rail. I guess, in that discipline the square tube finishes second compared to T-slot and the I-beam is third? Unfortunately the filament path usually doesn't allow us to mount the extruder below the beam... Just got inspired to make T-slot extrusions from prepreg-carbon, but thaby o_lampe - General
QuotePDBeal In my case, these are only going on my Z axis, so speed isn’t going to be an issue. You can use "Z-lift on layer change' to move the bed away some extra steps, then move back to next layer height. That should give you the extra peace of mind about microstepping does or doesn't really work. and you don't have to care about the ratio between fullsteps vs layer height.by o_lampe - General
I believe, mounting a part cooling fan in an angle any other angle than 0° or 90° shortens it's live, because of the constant zigzagging of the hotend. A remotely mounted fan with a flexible tube might be the best option in an enclosed chamber. BTW: Which filament requires a heated chamber and a part cooling fan? IIRC, I printed ABS without part cooling.by o_lampe - General New Machines Topics
I must've missed that thread. Very impressive What if you'd use one NEMA23 extruder instead of three Bondtech ( $$$ )? Approximately same weight or even less. Would it rip out the Bowden tube? Would it melt fast enough? (only one meltchamber instead of three). Maybe a longer melt chamber would do the trick...by o_lampe - Developers
Quote Constrain smooth rods at one end only. Bronze bushings for other end? Teflon tube is prettty good as a smooth rod guide. Tie-rap it for tighter contact if needed. Usually I just cut it diagonally and press it into the bracket = sort off self adjusting. QuoteWater cooling is the only rel option past that. Go for water cooled steppers, too. Much easier to implement than rebuilding the wholeby o_lampe - General
How do you adjust the bearing clearance? Using eccentric screw posts or do you add some tensioners in the brackets? Most people would be afraid of the noise coming from naked bearings on extrusion.by o_lampe - Extruded Aluminum Frames
Your vision system could add a request_pin_state after each move. That way a switch ( no push button ) can cause a pause (or maybe run a macro of your liking?). In RRF it could be M577 or similar ( eg. filament runout sensor )by o_lampe - Delta Machines
It's a matter of reliability. Hard to calculate 'luck'. Moving 1/16 step only might or might not work, but moving 17/16th step sure works. How can you put that in a formula? Best practice would be to drop the axis a few steps, then move up to the desired position. Just guessing here...by o_lampe - General
Guiding the belt like you showed for the Z motor requires a very long belt. A simple triangle with some extra wrap around the stepper pulley will do.by o_lampe - General
For common Deltas it would be a good separator between heated bed and electronics below. I prefer to build my Deltas with steppers on top, so it doesn't work for me. Any other ideas?by o_lampe - Reprappers
Replacing the steppers with 0.9° versions would double up the resolution. Using smaller GT2-pulleys where possible would help, too ( 16 tooth vs 20 tooth ) Or leadscrews with finer pitch. Then there are stepper drivers with upto 128 microstepping vs 16 microsteps, but that's no reliable improvement. You have to make sure, your mechanics run without play, backlash or binding to help steppers to reby o_lampe - Stepper Motors, Servo Motors, DC Motors
Instead of rotating the arm, you could move the bed in Y-direction. Otherwise you'll have limited movement when the printhead is closer to it's center of rotation. (eg. at low and high Z-coords)by o_lampe - General New Machines Topics
A while back, I also thought 0.9° steppers were 'the holy grail', but for extruders they don't make sense. It seems they not only loose some steps when the filament back-pressure exceeds a limit, but they got pushed back a lot. On my E3D Titan, I replaced the original 0.9° pancake with it's 1.8° brother (17HS08-1004S) and my retraction setting worked much better since.by o_lampe - General
Z-Axis: There have been comments about the 4 linear rails and I copy that. I'd even go further and use only one leadscrew. Add 'parallel bar' idlers to your bed frame instead. Pretty easy in your case, since the bed frames side bars are already aligned with the frame members.by o_lampe - General
I found a cheap source for PPS cutoffs ( polyphenylen sulfide ) . Thick plates and thinner sheets available. I was wondering, what to do with it? You rarely see it for sale. Quotewikipedia PPS is one of the most important high temperature thermoplastic polymers because it exhibits a number of desirable properties. These properties include resistance to heat (220°C), acids, alkalies, mildew, blby o_lampe - Reprappers
QuoteProblems: - i think we will have problem that can not be solved without encoder. - e.g. when the extruder head hits some object or presses the extruder ( future suction cup ) on floor, robot misses few steps and then it looses it self. - i can "fix" this programmatically in vision system and with some side sensor but this is not best solution. Your suction cup will benefit from a spring loadby o_lampe - Delta Machines
You should fill in a brief descripriton of your unique printer kinematics. ( Best place is the signature ) To me it sounds, like the angles of the arms are crossing a limit in the kinematic-equations when the arms are stretched out to the bottom. Only DC42 will know what to do...by o_lampe - Delta Machines
If it's related to ribbon cable length or bad contact, it would show all kinds of different errors. Those LCDs are all 'compatible' with a standard LCDs command code. If you happen to have a repeatable mis-function, it's likely it misinterprets one command or even ignores it.by o_lampe - Reprappers
I'll start with NiCr wire, but I'm not sure, how evenly it would spread the heat. I thought of using Polyester foil ( UL approved upto 130°C ), but I'm afraid of hotspots then... Instead of cutting, it would be possible to make long strips of NiCr foil and fold it in shape. A bit fiddly, but it's a start.by o_lampe - Reprappers
I want to make my own Kapton heater elements from NiCr foil ( Nichrome ) sandwiched in Kapton tape. I read, the NiCr foil is usually etched into the desired shape. But I want to know if there are other ways to produce low numbers of elements? Could it be lasered? Which laser would do? You can sure cut it with scissors, but is it repeatable? Can I solder wires to the foil or do I have to weld orby o_lampe - Reprappers
Ich würde den Thread in das Deutschsprachige Forum verschieben und evtl. noch ein paar Kontaktdaten zufügen. Dann gehts vielleicht schneller?by o_lampe - General
If I had to guess, I'd say your Z-axis is binding. And it's prominent in Slic3r, because it drives Z on max. speed settings, which is too much for the stepper at the binding-point. The same line is visible in the third pic, but there it looks like the tension that causes binding sprung free.by o_lampe - Slic3r
Some people use linear_rail_only on their CoreXY gantry and it works with a light load like a remote- or Bowden extruder. Placing rails in the corners of a solid woodframe might work too. But it can deform over time.by o_lampe - Mechanics
If you meant manual PID tuning by tweaking the PID parameters you've found earlier, then yes.by o_lampe - General
QuoteBoard design improved in oct. 2016 says the pic? But the Maestro is brand new...by o_lampe - Duet
The bed frame of my test setup is a simple ' |_| ' shape, but it would be better to constrain the ends from rotating around 'Z'. Like a V-roller running in openbuild-extrusion. But a closed rectangle as bed frame with solid corner brackets and a stiff connection to the mgn12-carrier would be good enough, too.by o_lampe - CoreXY Machines