johan
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Everything posted by johan
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Hi, I see now, that I forgot to paste in the link in my post earlier on.... Here it is: http://airtripper.com/1338/airtripper-extruder-filament-force-sensor-introduction/ Johan
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Have you seen this? Check out the link in the first post! Some nice research! :-)
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question about LCD controller substitute
johan replied to yzorg's topic in Third party products & modifications
Hi, Just tried to Connect the LCD from Gadget3d, and turned on the printer without recompiling Marlin. It lights up, and is showing what it is supposed to show! I can scroll thru the menues and the clickencoder does it's job. This panel also work With the RAMPS 1.4 on my RepRap. This is of course no guaranty tha the RepRapdiscount panel will work, but I am quite sure it will. Johan -
question about LCD controller substitute
johan replied to yzorg's topic in Third party products & modifications
Hi, If you open the Configuration.h of Marlin in Arduino, you will find a lot of different LCD panels, one of them the Reprapdiscount panel. I can try to test a LCD panel from Gadget3d (very similar to the one you have found) on my Ultimaker, when my print is finnished. :smile: Johan -
Where to buy Stepper Motors?
johan replied to matthiash's topic in Third party products & modifications
Ultimachine.com -
Where to buy Stepper Motors?
johan replied to matthiash's topic in Third party products & modifications
@jumpmobile: that stepper looks like a Nema 23..... If you live in Germany, try germanreprap.com -
Where to buy Stepper Motors?
johan replied to matthiash's topic in Third party products & modifications
Allmost every web store selling parts for Repraps, are selling steppers with the D-shaped shaft.... -
Dual bolt extruder drive
johan replied to jumpmobile's topic in Third party products & modifications
Hi, I made a double extruder for my Reprap two years ago. It is a combination of the Makerbot MK6 direct drive extruder, and a hinged Wades. It uses two high torque steppers rotating in oposit diections. I made this solution after having missed stepps on a single stepper direct drive extruder.It's like a tanks! :smile: It's not grinding filament, but I have had occational blokings in the hotend (j-head 0.35mm). I actually beleve that it is the unmolten filament that blocks the hotend at high speeds (FR 250) https://dl.dropboxusercontent.com/u/55953222/Extruder%20closed.JPG https://dl.dropboxusercontent.com/u/55953222/Extruder%20open.JPG Johan -
little thing to try to minimize Z axis wobble
johan replied to italianmaxx's topic in Third party products & modifications
In the Reprap community many have changed from M8 to M5 on the z-axis. The M5 is not rigid enough to "over rule" the smoothrods. They also use flexible z-couplngs and add flex in the Z-axis motor mount.... On the BFB Touch they use arms to hold the moving z-platform, but the arms from the lead screws are not constrained in x-y on the platform to avoid z-wobble. Johan -
Worm instead of hobbed bolt for extruder
johan replied to that_guy's topic in Third party products & modifications
The BfB Touch and Rapman printers have(had?) wormgear extruders. They have good grip on the filament, but I thik I have read that they are not good with retractions, and "eat" filament and leaves a lot of dust. Johan -
gr5: Thightening the short belts did the trick! :-P Johan
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Hi, Thought I had my shortbelts nice and tight, but.... I have covered the printer with a large plastic sheet, to create a heated champer, so I guess the wood have dried out and loosened the bolts for the steppers. I will run a new print tomorrow to se if the problem is solved, but I really think you nailed it! Thank you! Johan
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Hi I have a problem with top layer not being totaly filled. I have redused the acceleration settings in Marlin to 1000 ( from 3000) and that helped a bit, but still not good. The filament is squized out to about 0.9mm, but there is stil a gap of about 0.4 mm between each tread. The perimeters and loops is perfect, so I dont think that I suffer from under extrution. It looks like the hotend moves to fare from the previous tread.... This is my settings: https://dl.dropboxusercontent.com/u/55953222/Settings.JPG Johan
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Heated bed with carbon fibre plate?
johan replied to Dim3nsioneer's topic in Third party products & modifications
BfB touch, now 3d Systems Cube X, has/had a carbon fiber printbed upgrade. -
Fixing Pulley Innacuracy
johan replied to snowygrouch's topic in Third party products & modifications
@ Nick Foley: I have bought a full set of them, and they look good. I haven't replaced them yet, but it fits nicely on the Misumi smooth rods I have bought to do the direct drive upgrade. -
Fixing Pulley Innacuracy
johan replied to snowygrouch's topic in Third party products & modifications
Adafruit is selling Gt2 pulleys with 8mm bore. Johan -
Fixing Pulley Innacuracy
johan replied to snowygrouch's topic in Third party products & modifications
Why not switch to GT2 belts and pulleys, when puting so much time and money into an upgrade? Johan -
To me this looks like a upgraded BfB touch..... Johan
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I think the TC/tcboard can be over sensetive.... I get a 10 degrees drop in the themp reading if I hold my hand close to the hotend ( not touching it), and it rises again when I take my hand away. Johan
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Hi, I am using Cura on both my Ultimaker and my Reprap. I like it very much, and find it much simpeler to use than the RepG/SF combination I used earlier on my Makerbot TOM. There are just to things that I really miss: The possibility to run perimeters slower than loops and infill, and the Jitter function in SF. Johan
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Calibration Techniques and Printhead Mods
johan replied to jleichne's topic in Third party products & modifications
Hi. Woulden't it be easier to swop the 1.8degree steppers, with 0.9 or 0.45 degree steppers? Then you would get two or four times as many steps pr millimeter. -
I found that, but can I set the pushing back to less than the retraction lenght? for example retract 10mm, and push back 5mm instead of 10mm? Johan
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Hi, I am using Cura on both my Ultimaker, and my Reprap, and am very pleased. At the moment I am printing on the Reprap at high speed, and it is coming out nicely. The only thing is that I get a little blob where the z lifts. I use a retraction speed of 35mm/s, distance 12mm and extra lenght on start 0mm. The Reprap have a Bowden extruder. I can see that it purges out about 7mm before it starts to move the head. I guess this happens because of preassure beeing build up in the Bowden tube. In SF you set both the lenght of retraction, and how much you push back after the move if I remember right? Is it possible to do this in Cura? Johan
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next UM nozzle ? Wish List
johan replied to destroyer2012's topic in Third party products & modifications
Hi. Have anyone made calculations on how much heat you have to supply on at a given speed? I just wonder if the truble we get with the extruder and the hotends is caused by unmolten filament beeing jamed down into the nozzle? If the 3mm filament hasn't melted in the core, it will actualy block the nozzle. If the nozzle had been a little bit offset from the filament input, this would be solved. Johan