care to elaborate on the whole circuit? I understand what the resistors do, but what does the diode do?by aduy - General
I have an old hot end made by this guy, it was either the first or one of the first hot ends, and it worked great but nozzle changes were a pain, I even helped him research some different materials for a while but then he got angry at me and told me to send his beta hot end back for some upgrades and then basically told me to shove it up my you know what and never returned the hot end(which i didby aduy - General
agreed but it would be better to use a force gauge and when there is a spike in force slow down or stop the print.by aduy - General
someone should try making a drive that uses two flat rubber belts. the belts would run like a tread mill and the filament would be in between the two sets of belts. sorry for the crude drawing. you could use four timing pulleys and two small continous timing belts.by aduy - General
Its weird but black abs always comes out really nicely on my machine. I do print with a .65 nozzle though.by aduy - General
i bought a 20 dollar 1500watt space heater off amazon prime, it worked great and i was able to keep the chamber temp above 70c during the entire print, and its a 500x500x500 chamber.by aduy - General
Quotestrantor Quoteaduy Ive found that getting proper adhesion is fairly consistent amongst different materials, for example all thermoplastics perform better when they are dried before printing, except for pla using a heated build chamber always helps with adhesion. Ive printed some large 12x12x12 pieces in abs and the warping forces actually made a split along the xy plane about half way througby aduy - General
Ive found that getting proper adhesion is fairly consistent amongst different materials, for example all thermoplastics perform better when they are dried before printing, except for pla using a heated build chamber always helps with adhesion. Ive printed some large 12x12x12 pieces in abs and the warping forces actually made a split along the xy plane about half way through a 50 hour print, evenby aduy - General
so I did get them to work, I simply unsoldered the optocouplers and used the inverters from a 74hc14 in their place, I think i might need to cut some traces and whatnot but im not sure exactly. they do work but only on the 20% torque setting otherwise i get a lot of hiss and jerky steps.by aduy - General
just connect the two black wires and have both green wires go into the plug next to eachother.by aduy - General
I think part of the reason ptfe works so well is when it does get hot it actually has more give so if the filament does swell it doesnt jam as much as something that is rigid like metal or ceramic. I think a great unexplored material is actually high temperature silicone, if youve ever taken apart a hot glue gun you will notice that its an extruder that has a metal tube with a silicone tube as thby aduy - General
ah success! ok so for whatever reason disconnected on the enable pin means enable and i think anything else is disable. also once I bridged the optocouplers the 5v is no longer needed. maybe the +5v is actually the enable. for whatever reason they are really very noisey no matter what settings I use. they are really strong though and the motors can push with a lot more force, maybe they work betby aduy - General
actually if you make sure that the tube leading up to the melt chamber is about 2mm you could use the 1.75mm with no problem other than the retraction wouldnt work very well. you could probably get faster melt speeds because of the increase in surface area in the melt chamber, although you might as well get 3mm at this point.by aduy - General
I've bridged over the optocouplers at this point so I'll give it a try later tonightby aduy - General
ok so i see one optocoupler and the other chip seems to be some sort of timing chip but i am not certain.by aduy - General
you need to make sure the nozzle size is set correctly in your firmware.by aduy - General
Ive tried inverting them in the firmware but it does the same thing either way. I almost wonder if its using tristate logic and disconnected is enabled. also im going to try and see if this helps with the hissing and step skipping.by aduy - General
So I'm not home at the moment but another issue I had is that the motors only move after I click the turn off motor button in rep host.by aduy - General
Hello ive just got a couple tb6560s to use on my machine but im having trouble configuring them. my motors are 1.4amps and my supply is 24v, ive hooked up the step dir and en pins from my electronics to the boards but they dont seem to step correctly. any help would be appreciated.by aduy - General
non e3d, but drilling is not difficult, you just need some quality bits.by aduy - General
.65 is what I normally run on my current hot end, the extrusion width can go basically as low as the nozzle width without issue and the flow is increased a lot.by aduy - General
so when are you guys planning on shipping out the kraken hot end for this months batch?by aduy - General
QuoteDeuxVis Quoteohioplastics This ought to get you PLA loving ecohippies off my back. I'm a bit puzzled about your communication model. Do you think that insulting your potential clients/users will improve their confidence in your products ? Its a joke, people use pla because it is easier to print with(less warping and no heated bed), not because its eco friendly, ABS is actually a lot easierby aduy - General
so ive actually got a set of lm8uu equivalent drylin igus bearings and they are great for the z axis, but they are not as good as the openrail/vslot bearings that i now use, the vslot bearing wheels are quick quiet and accurate. so in short the drylin are very good for the z axis but not as good as a ball bearing wheel on the x and y axis.by aduy - General
the issue with the hbot is the forces acting on the horizontal bar are not even so if you dont have a rigid mount the bar will torque and angle it self, however the corexy fixes this by equalizing the forces.by aduy - CoreXY Machines
its your layer height, what are your z axis screw pitches? and microstepping settings and what layer height are printing at?by aduy - General
yeah ive got a picture, and no for abs the water cooling is not needed but it helps to shorten the transition zone to almost nothing. and for pla thats good.by aduy - General
PTFE becomes soft at printing temps so it can't be structural. My current hot end is basically a Bowden tube attached to the nozzle. The heater block slips on around the nozzle, the nozzle screws onto a piece of stainless that has a hole for the PTFE to go through. The stainless is held between two pieces of phenolic, which is attached to another piece of phenolic with some standoffs. The ptfe tby aduy - General
ive been researching doing a belted or cabled z axis, it would need at least three seperate cables. Id like to use maybe 4 spectra lines for each cable and then have them feed back through pulleys to a drum. the drum would have a large gear reduction so it could be run by one motor and maintain an accuracy of 3200 steps per mm using a 200 step motor and 16x microstepping. or maybe just 200 stepsby aduy - Reprappers
actually ptfe can be used up to about 285, and this is much better than peek because the peek was a structural component in the hot end. I bet a high temp silicone tube would work pretty well in the place of ptfe.by aduy - General