I have attached the connection diagram from the build instructions I got from MakerFarm. Using the same terminology this diagrm uses, I currently do not have a Print Cooler running (fan to cool the printed objects). What I have is a Cooling Fan. So, I am not using D9. I just noticed that the diagram shows Cooling Fans are connected to the lower 12V line, but I have my fan connected to the uppby Yamster - Controllers
Cefiar Wrote: ------------------------------------------------------- > Sounds a bit like it. > > That PSU has dual 12V rails internally (according > to the page you linked). Each rail will have a max > current rating, and if all your electronics are on > the same rail, then it this might be the issue. > > You should try using one rail specifically to run > your hot eby Yamster - Controllers
3Diddy Wrote: ------------------------------------------------------- > I offer a suggestion which, admittedly, I haven't > tried in this situation. > Here in the UK we wrap thin PTFE tape around pipe > threads before we screw together plumbing > fittings. I believe that PTFE is pretty heat proof > (Wiki says it's melting point is 600K, and as the > Teflon brand it is the coby Yamster - Reprappers
ohioplastics Wrote: ------------------------------------------------------- > I've had a lot of experience in wrapping hot ends > in fiberglass. If you do it a certain number of > times, you'll get a decent looking bundle, but the > first couple you do will look like rubbish. I'd > like to think I have it down to a science, but > it's really an art form. > ebay[/ > url] Iby Yamster - Reprappers
jbernardis Wrote: ------------------------------------------------------- > I have a 25mm fan pointed directly at my hot end > running full sped constantly and have never had an > issue with reaching temperature. Most of the time > the hot end reaches its temp LONG before the bed. > I got the fan to use with my j-head for printing > PLA, but i've also accidentally had it turneby Yamster - Reprappers
I would like to put some insulation around the hot end (around the nozzle) to prevent it from getting cooled down by the cooling fan. I tried to put some cotton-like fiber glass insulation material around it with Kapton tape, and it didn't work out very nicely. It was just so messy... Do you guys insulate your hot end? If you do, how do you do that? I saw someone using a piece of one of thosby Yamster - Reprappers
I have a PSU which I have been using with my printer for about a month: So far, I had three instances of this PSU going out. 1. The firs time, I don't know what triggered it. I was not printing anything. I think I was moving the X carriage up and down - to zero in on Z axis, and all of sudden I realized nothing was moving. I noticed that the PSU fan wasn't moving. I tried connections hereby Yamster - Controllers
Okay... I was gonna say that I no longer have the jamming issue, but.. in order not to jinx myself, let me just say I was able to print a couple of object without jamming. I used my old trusty PLA, It will be interesting to switch back and forth between PLA and ABS, which is exactly what I did when I got myself into the second (the latest) jamming issue, and see what happens. Yeah, and remembeby Yamster - Reprappers
Wow.. these things look really sharp. I mean.. literally sharp. LOL. I wonder if they are going to stay that sharp. Maybe they didn't have to be that sharp to begin with, so it may not matter even if they get dulled. However, if some of those tips get bent, and break off... Well, I shouldn't mention the "J" word... With so many "J" issues I have been having lately, I was also thinking about tby Yamster - Reprappers
Do you start printing from Pronterface (by hitting "Print" button)? If so, then what does Pronterface say when it refuses to print? Does the "Print" button changes to "Restart" (as if the printing has started) with no messages, but nothing is getting printed? Another thing I am wondering is... how you were able to find out the printing will start if you disconnect the thermistor. LOL Probablyby Yamster - Reprappers
tleneel Wrote: ------------------------------------------------------- > I use 0.35, 0.30, 0.25; I think I have a 0.15 > laying around somewhere. > > As a rule of thumb I use a maximum layer height > of 80% of the nozzle diameter. Currently using a > 0.35mm @ 0.20 mm layer height with good results. That's somewhat consistent with my experience so far; I had problems with 0by Yamster - Reprappers
Traumflug Wrote: ------------------------------------------------------- > 1. > > In particular, you have to increase the steps/mm > value to the double ... which also limits top > speed to the half. Having to double steps per minute value sounds like the motor will have the same revolution per minute... Wouldn't that be the case? 0.9 degree step size motor would take twice asby Yamster - Stepper Motors, Servo Motors, DC Motors
waitaki Wrote: ------------------------------------------------------- > I see the J-Head hotend mentioned more than any > other make on these forums. And it seems there are > just as many people reporting them jamming. > Why are people buying them? In my case, because I didn't know any better. I bought a kit to build my printer, and it just came with a J Head. What other types oby Yamster - Reprappers
Hello, I was looking for a NEMA17 stepper motor for the second extruder I am making. I stumbled on to this web site, which sells a few variety of stepper motors. The price looks decent, too. However, the motor I would like to get has step angle of 0.9 degree, which is half of the step angle of all the other motors I have on my printer. If I want to use this smaller step size motor in my prinby Yamster - Stepper Motors, Servo Motors, DC Motors
I got the new fan I ordered this afternoon. I installed it on the extruder (this is to cool PEET part of the J Head), loaded up the black PLA, started printing a test piece, and guess what - no more jamming!!!!! Well, there are some bold spots caused by no extrusion here and there, which is a new issue I am trying to figure out, but at least as far as I can tell, I no longer have the jammingby Yamster - Reprappers
Does anyone use 0.35mm or smaller nozzle? If you do, what is the maximum layer/extrusion height and width you were able to print without any problem? I've been trying to print using 0.35mm nozzle at 0.3mm layer height setting, and I kept having "no extrusion" issue. It's not a jamming (I don't think it is) because after a few seconds the extrusion continues... It just keeps happening every nowby Yamster - Reprappers
sheck626 Wrote: ------------------------------------------------------- > I'd look into your filament possibly being > contaminated. Yes.. I think that's a high possibility. I mentioned in another posting, but the very reason I bought this particular ABS filament from this eBay seller was the price (and free shipping!). Well, I have been pretty much suspecting every possible thing in myby Yamster - Reprappers
So I installed a brand new J Head which I have bought recently (I wanted to try 0.35mm nozzle - the one I had was 0.5mm). I fed the filament, heat up the hot end, and extruded about 5mm without any problem. Re-generated g code for a test piece (with configurations for 0.35 mm nozzle), load the g code to Pronterface, and hit Print. It started jamming in the middle of first layer! Wow.. just inby Yamster - Reprappers
kburr Wrote: ------------------------------------------------------- > Curious as to what temperature you were printing > the PLA at and when you switched over to ABS, what > temperature was that? I had the temperature setting 185/180 for PLA and 220/220 for ABS. Actually, it might have been 225/220 for ABS - I am getting old, and the frustration from this jamming issue sure is accelerby Yamster - Reprappers
Mogal Wrote: ------------------------------------------------------- > Since I put a fan on the cold side of the > extruder, I have yet to get a jam. > (knock on wood of course!) > But, I had a fan when I got the latest jamming... I've actually ordered a fan with higher airflow rating, thinking that maybe my fan wasn't doing its job - I was using a cheap $4.99 fan with <5 CFM.by Yamster - Reprappers
I haven't gotten the thermistors I've ordered yet. But I finally found the thermocouple prongs for my multi-meter the other day, and confirmed the temperature reading is fairly accurate. Actually, it was somewhat interesting how much the temperature difference was on a different point in the brass nozzle. 1. The tip of the nozzle (where the plastic comes out) is good 20c below. At first itby Yamster - Reprappers
No. There actually were times (I had so many instances of jamming) I was able hand feed, but the last time, just before I totally disassembled my J Head and decided to replace the PTFE, I was not able to hand feed it. It took a lot of strength to squeeze out maybe a millimeter or two (not the distance the filament pushed, but the length of the extruded plastic ), then I could not push it anyby Yamster - Reprappers
I got it from MakerFarm. I believe it's original J Head, not a clone. It's a J Head Mk IV B, not V, though thejollygrimreaper Wrote: ------------------------------------------------------- > where did you get your jhead from?by Yamster - Reprappers
Yes, I ran a bare 26 AWG wire (0.40386mm diameter) through it to make sure there's nothing clogging up the hole. I did have to clear up some plastic, but I believe it was just a little chunk of plastic left behind when I pulled out the filament to clear jamming. Now I am actually suspecting the PTFE liner. I had so many jamming, b/c I kept on trying again and again, and as a result I had a loby Yamster - Reprappers
I had less than 24 hours of joy after fixing the jamming issue I had all week... and it came back. I printed a pretty complex object with PLA without jamming, then changed to ABS filament (maybe I shouldn't have?) and printed another fairly complex object without any issue. Then I switched back to PLA (maybe I really really should never have?) and start having the same jamming issue. I did eveby Yamster - Reprappers
Hmm... yeah, I think moisture in the filament would make sense.. Also, every once in a while, especially at a higher temperature (above 220c) I see a little bit of white smoke as well - I think that may have been water vapor. How do I dry it out? Should I bake it in a oven (of course at a very very low temperature - certain below the boiling point since I wouldn't want to pop all the moistureby Yamster - Reprappers
Hello, I use Slic3r to slice an object and load the g code from Pronterface to print the object. When printing a small test piece for calibration, I would like to print it to a different location on the heated plate instead of printing it on the center all the time. I use a glass with hair spray on, which has been working out great for me, but after a print or two I lose adhesion and need toby Yamster - Slic3r
Hello, When you switch from PLA to ABS, or vice versa, are there any settings which you want/need to change, other than the hot end temperature? I'm getting a lot more blobs and ooze outs with ABS when printing with the same settings I've used on PLA (except for the hot end temperature). There are so many blobs that knock the hot end causes X/Y steps to skip, eventually causing the printer toby Yamster - Reprappers
Now I am trying to print with ABS for the first time. I've gotten white ABS filament (3mm) from some eBay vendor (their price was really good), and tried to print a small test piece with it tonight. when I extrude the plastic into the air (let it drop, instead of printing on the heated plate), I noticed some popping sound. I can actually see what looks like a burst of little bubble - it makeby Yamster - Reprappers
Well, I guess I can officially close this issue - I have printed a more complicated piece which took well over an hour (I didn't time it actually) and it printed without any jamming. This actually is the very piece with which I started having a jamming problem last week. So, I can confidentially say I no longer have a jamming issue... at least for now and until I have another one. LOL Like I sby Yamster - Reprappers