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http://reprap.org/wiki/CoreXY
Re: Delta printer ball joints, let's talk! - 1 year ago
Quotejcs Quoterq3 Magnetically, there two issues with using a steel cup. The side of the cup stuck to the magnet gets the opposite pole induced into it. If the magnet face is, say, north, the sticking face of the steel cup is south. Of course, the other face of the cup is then north, and the ball is trying to stick to a north faced steel cup with a north faced magnet just under it. Not good. Anyby rq3 - Delta Machines
Re: Delta printer ball joints, let's talk! - 1 year ago
Quotejcs Just for anyone that's interested, I used the same geometry as leadinglights shows except I used spherical magnets as well, instead of steel balls. Along with the aforementioned mouse tape that works fine with no shifting. Of course you have to make sure the magnetic poles are optimally aligned. Magnetically, there two issues with using a steel cup. The side of the cup stuck to the magnby rq3 - Delta Machines
Tri-Metal Heatbreak - 1 year ago
Based on the E3D V5 units, but dimensioned for my heatsink. Grade 5 titanium hot end threads, OFHC copper cold end, connected with 0.009 inch wall 316 stainless hypodermic tubing. A lot easier to make than the heatsink! I think I'll pop this puppy on a printer and try it out this weekend.by rq3 - Tech-Talk
Re: Delta Printer building - 1 year ago
QuoteGaou Quoterq3 About twice a year I pop the arms off the balls, clean everything, and fill the countersink in the magnet with Teflon loaded grease. so you are saying you are metal on metal, like mine ? you ve done great work with the rods for sure. i dont have the tools or the mechanical knowledge and experience to do what you did. i got myself a print today and it seems that i have a problby rq3 - Delta Machines
Re: Delta printer ball joints, let's talk! - 1 year ago
QuoteGaou i dont have a cup . I do have some countersink magnets glueed with instant glue on my effector and on top of that there are the the balls....! i have read what you are telling me some minutes ago on the forum . Seems very right . I do not know if that's the case on mine since there is equal force in a certain diameter on the ball. You can see that in the post for the delta i ve made.by rq3 - Delta Machines
Heatsink done and mounted - 1 year ago
6061 aluminum, 19 grams, probably half of which is the darn groove mount end not visible in the photo. Also attached is the FreeCad file for the latest, and hopefully last, bearing carrier. I've printed 19 of these things, with various tweaks, and machined one from 7075 aluminum. The cantilever spring slot is wider (0.5mm instead of 0.25mm), and there is a 3mmx0.5x5mm adjustment screw for the fiby rq3 - Tech-Talk
Re: A Very Different Extruder - 1 year ago
Quoteleadinglights Just a passing thought: Is it possible that this would work with only two wheels? At first blush, this sounds silly as the filament would pop out sideways as very under-constrained. However, the sideways force may possibly be easily constrained with guides if they were slippy enough or maybe with guide bearings just beyond the ends of the drive bearings. The question is, how biby rq3 - Tech-Talk
Re: A Very Different Extruder - 1 year ago
A couple of observations after playing with this idea, for any one else who may want to pursue it. I tried grit coating the bearing OD's by rolling them on a film of thinned JB-Weld epoxy on a glass plate, and then into a dusting of 400 grit aluminum oxide. The process worked fine, but oddly didn't really make the pull-out force on the filament much better, and made the repeatability MUCH worse (by rq3 - Tech-Talk
Re: Delta Printer building - 1 year ago
Some time ago one of the arms on my delta broke. I got tired of waiting for a replacement from China, so I made my own. The balls are 1/2" diameter 440C stainless steel bearing balls. I got a box of stainless steel 3mmx0.5 flat head machine screws, 10 mm long. I threaded the screws into an aluminum hex standoff to protect the threads of the screws, and chucked it in a lathe. Then I plunged a 1/2"by rq3 - Delta Machines
Re: Z axis screams after Marlin update - 1 year ago
QuoteElectric ant Well, first I'll say thanks to Dust for the only reply I got. And thanks to everyone else for their total lack of interest. 170 odd views and only 1 reply (and that was around the 5th view). People on other websites have told me that the Reprap forum was a good place to go to get help with almost any 3D Printing problem. Boy were they wrong. Either that, or nobody else has eby rq3 - Firmware - Marlin
Re: A Very Different Extruder - 1 year ago
QuoteMKSA So ? Where is the hot end, and all the rest ? Seriously, I know how this "works", not a new idea. What would be new is a working and if possible better extruder ! Someone who boasts: "Very repeatable, and accurate to 125 nanometers (16 microsteps and a 1.8 degree stepper. 62.5 nanometers with a 0.9 degree stepper)." better proves it ! Actually, I don't have to "prove" anything, aby rq3 - Tech-Talk
Re: A Very Different Extruder - 1 year ago
@VDX, a superlative idea! Any thoughts on laser type and settings? I have access to a 100W CO2 unit with a rotating fixture. I know my 20W FAP 800 nm unit won't do it.by rq3 - Tech-Talk
Re: A Very Different Extruder - 1 year ago
With 10 mm OD bearings equidistantly spaced on a 11.6 mm circle as the center locator, they each try to "bite" the filament by 0.075 mm. It doesn't sound like much, but if you draw it out, you'll see it's an appreciable amount of the filament circumference. You could go to an 11.55 mm mount diameter and get a 0.1 mm bite on each bearing, and there would still be clearance at the bearing peripheryby rq3 - Tech-Talk
Re: A Very Different Extruder - 1 year ago
Mike, this idea is based on the Roh'lix linear actuator. Years ago I purchased several units to see if they were repeatable enough for a 3D printer. They were not. It then occurred to me to grit plate the bearing OD's like a Hewlett Packard drafting plotter. The idea is that the grit particles make tiny pits in the shaft on the first pass, which then automatically align with their respective partby rq3 - Tech-Talk
A Very Different Extruder - 1 year ago
A shot of my prototype extruder, which weighs about 10 grams more than the 70 gram (11.6mm thick Sanyo NEMA 17) motor that drives it. Upside: Very repeatable, and accurate to 125 nanometers (16 microsteps and a 1.8 degree stepper. 62.5 nanometers with a 0.9 degree stepper). Very light. Very small. No gears or other hard to machine parts. Ferocious mechanical advantage (13.75:1), so a much smalleby rq3 - Tech-Talk
Re: Kossel mini, smart effector and Marlin 2.0 Probe not working - 1 year ago
@deezums, there was an error in the latest releases of Marlin (both bugfix and 2.0.8) that caused probe errors. It was fixed yesterday (May 2). Try downloading a fresh copy of Marlin again. The error was in the motion.cpp file.by rq3 - Firmware - Marlin
Re: Marlin 2.0.8 released - 1 year ago
And it works very well on my grossly modified Anycubic Predator delta. Compiled and installed with no issues. The temperature control of both bed and nozzle is faster and tighter, and there are no screen or touch glitches. Basically plug and play so far. And yes, I'm still using the original Chitu Trigorilla Pro board.by rq3 - Firmware - Marlin
Re: Nema 17HS13-0404S Motor? - 1 year ago
It's not necessarily the torque, but how quickly you can apply the current you need for the motor to get to where it needs to be. The motors you are considering are rated for 12 volts, and have a 30 ohm coil resistance, and VERY high inductance. This means that they will not respond quickly to step inputs. Your motor drivers will deliver the current required, and in general, for a CNC applicatioby rq3 - Mechanics
Re: Air gauging for filament size - 1 year ago
Mike, my only suggestion might be to pull a vacuum, rather than apply pressure. Typical aquarium pumps can be easily converted to do so, and that would make the ambient atmospheric pressure the "calibrated", self correcting, baseline, since their second port is exposed to atmosphere. Most of the MEMS barometer units from Bosch, STMicro, and the like, will easily register millitorr (if not microtby rq3 - Tech-Talk
Re: I get "Heating Failed: E1 PRINTER HALTED" when reaching target temperature - 1 year ago
I often get the same error, even if I wipe my nozzle's nose during heat-up. This is a known issue with the later Marlin releases, and includes errors with PID tuning, and the maximum applied power to either the bed or the nozzle, whether bang-bang or PID. I wouldn't expand the "safety limits" for convenience. I'd rather reset the printer and start over than have it catch fire. Once I DO get theby rq3 - Firmware - Marlin
Re: Help with modifying Marlin (specifically, controlling steppers) - 1 year ago
I have no idea if this may be related to your issue, but Marlin jumps between mm/second and mm/minute, depending upon whether you're looking at configuration files or the underlying C++ code for a particular function. Adding a couple of zeros to a mm/minute function might make a sluggish stepper wake up and move somewhat as expected? Just my $0.02 worth.by rq3 - Firmware - Marlin
Re: Is there a simple way to get just the inductive probe status? - 1 year ago
I apologize that it's not a Marlin fix, but can you wire a low current LED to the probe signal line? I've done that to the piezo probe on my delta, and it is nice to be able to see the LED flash when the probe is triggered. There is a need for what you want in Marlin. It's a neat idea, and you may want to add a feature request to the Marlin github. It should be easy to do, if it doesn't already eby rq3 - Firmware - Marlin
Re: Report on under bed sensor problems - 1 year ago
Mike, I hear you. My company manufactures aircraft avionics. 99.9% of my customers are terrific. The remainder have done things that make my jaw drop. And these are folks that are licensed by the Federal Aviation Administration (FAA) to install my products, and other products like them, on aircraft. During phone calls my first question is always, "Did you read and understand the installation manby rq3 - Tech-Talk
Re: G33 - Delta Auto Calibration Just won´t Work.
- 1 year ago
Try either setting your delta height larger, or your probe z offset smaller (like -16.5 instead of -15.8). Your effector isn't getting close enough to the bed to trigger. Can your run an M48 probe repeatability test?by rq3 - Delta Machines
Re: Attaching files - 1 year ago
The forum says 8MB maximum file size, and a maximum of 10 files per post. What it really means to say is 800 KB, discovered through trial and error. Quite a difference, and aggravatingly low.by rq3 - General
Re: the program does not respond to the signal of Z-probe - 1 year ago
@chivel, you should probably post this under a section of the forum appropriate to your printer (RepRap, delta, scara, etc) or under a section appropriate to your controller or firmware (DUET, RepRap, Marlin, etc.) What program? What printer? What z-probe? You have to help folks help you. Your comment (not even a question), is like; "How high is the sky?"by rq3 - Tech-Talk
Re: Report on under bed sensor problems - 1 year ago
Mike, I managed to post the docx file in its entirety on thingiverse: The basic idea is not new, and in fact is how automobile engine knock sensors work. Feel free to leverage as you see fit. I'm surprised that apparently this hasn't been stumbled across in the printer community, and I'm shocked at how well, and easily, it works. Again, I'm happy to send one along if of any use to you. Ripby rq3 - Tech-Talk
Re: Report on under bed sensor problems - 1 year ago
Mike, I have an under bed piezo sensor on my delta, of a completely different design. I sure wish I could attach my notes or pictures, but the forum keeps complaining that they are too large (although they are not). I'd even be happy to send you a sensor if you're interested. Ripby rq3 - Tech-Talk
Attaching files - 1 year ago
I'm trying to attach a 1.8 MB word .docx file to a post, and the forum says it is too large. What am I doing wrong?by rq3 - General