Hey all....After finally getting my Mendel I2 printing beautifully, my RAMPS 1.4 is giving me trouble. Hotend won't heat up at all. LED is on on the RAMPS board, when I send the command to heat up the hotend (Heated bed heating normally). I checked the voltage coming off the D10 terminals, and it's showing 30V DC. Sounds like the MOSFET is blown? Haven't had to tinker with my RAMPS board at allby jonkeegan - RAMPS Electronics
Here's an AFTER (left) / BEFORE (right) image, of a calibration print. I had my fan disconnected, so the AFTER shot is saggy, but shows the difference with the under-extrusion solved.by jonkeegan - Reprappers
Hey everyone. Just wanted to share an update that after many stops and starts, I have FINALLY been getting some reliably good prints on my Prusa Mendel I2. I had some under-extrusion problems dogging me for a LONG time, and after looking in all the wrong places, I finally noticed the "wobble" in my Wade's Accessible Extruder gears...the teeth weren't reaching a consistent depth. So I ordered aby jonkeegan - Reprappers
This is my extruder: Think this is accurate (not at home right now) gear Ratio: 43/10 pinch wheel: 8mm hobbed bolt. probably between 7-5 mm Also looked at the formulas listed here;by jonkeegan - Reprappers
I'm using Wade's Accessible Extruder, using standard NEMA 17 motors. Here's my Marlin config file: I used prusa's calculator to get the extruder settings, but possible i need to re-do these. I think these are the key lines: #define DEFAULT_AXIS_STEPS_PER_UNIT {80, 80, 3200/1.25,1400} // new settings for prusa it2 #define DEFAULT_MAX_FEEDRATE {500, 500, 5, 25} // (mm/sec)by jonkeegan - Reprappers
Hey there everyone... I've been trying for months on and off to improve the prints form my Prusa Mendel IT2 RepRap. Recently I've been able to print usable enough parts that I was able to start making enhancements to my printer, but I'm still dealing with some under-extrusion issues. I just added a 40mm fan and fan duct, which focuses the air nicely, and an fine-tune adjustable Z-endstop whicby jonkeegan - Reprappers
Thanks for the helpful suggestions. Here's what I've tried: - Re-calculated myE steps to 916.844: (200*4.3)/(pi* 0.0625 * 4.78) using this formula -> (Steps*ERatio)/(pi*Microstepping*BoltDiamter) - NOTE that the diameter of the hobbed part of the bolt is currently reading 4.78mm from by digital caliper (is this too small?) - let the hotend sit for 20 mins at 230, extruded some PLA to clear aby jonkeegan - Reprappers
@JZATOPA: The data is from Wohler's Associates (wohlersassociates.com), an consulting firm who tracks this as as sector, and it's for sub-$5k 3D printers, not just Makerbot's.by jonkeegan - General
Wow, I'm really surprised by the tone of this all. Really misjudged the nature of this community. Carry on.by jonkeegan - General
Yes I am fully aware of the community's feelings towards Makerbot. I thought the community could separate those feelings, when a fellow member of the community is sharing something that helps explain this to a wider audience (I've found this forum to be very helpful and supportive as I've been building my Prusa Mendel over the past few weeks). The context was an explainer for general consumers, wby jonkeegan - General
Hey everyone, just wanted to share a cool project we launched today at The Wall Street Journal (where I work). To accompany a review of the new MakerBot Replicator Mini, we designed a 3D chart about 3D printer sales that you can download from Thingiverse. Here's our page with a fun animated video explainer of how 3D printing works (aimed at the general news audience): And here's the Thing onby jonkeegan - General
Argh this has been the most difficult troubleshooting.... OK so let me start with the clogging...the PLA I would extract would look like this: So I took my Greg's Accessible HInged Extruder apart, slightly realigned the center of the hobbed bolt teeth, so the hole was more inline with the groove. Also just tightened everything up, cleaned the teeth out, etc. Also the fresh package of 3mm PLAby jonkeegan - Reprappers
Hey everyone.... So I've solved so many problems on my Prusa Mendel IT2, but I have one last remaining problem. The PLA gets pulled in and starts extruding successfully, but then after a few minutes, it stops moving. I'm using a Budaschozzle .35mm and Greg;s Accessible hinged extruder. Seems like it has a good grip, and pulls very hard, but after the first two or so layers, it gets jammed up itby jonkeegan - Reprappers
I replaced my power supply with a 400w Dynex power supply (http://www.bestbuy.com/site/dynex-400-watt-atx-cpu-power-supply/8311052.p?id=1174091945952) and problem solved! Thanks for the help...by jonkeegan - Reprappers
So I'm just about ready to do my first print on my RepRap Prusa Mendel IT2. Everything is wired up (seemingly) correctly, I have gone through the firmware (Marlin) many many times, but when I set the hot end to 185c and the heated print bed to 60c (i switched to "bang bang" while troubleshooting), I can't get the hot end (Budaschnozzle 2.0c set to 7 in the firmware) to get past 150c, and the bedby jonkeegan - Reprappers
I think this is fully resolved now...I followed some advice I saw elsewhere in the forum, and tested the other motors on each driver, and confirmed they were all working, but did diagnose a wiring issue on my Z-axis due to some crappy crimping of mine. So when I plugged everything back where it was supposed to be, and used the better soldered connections, I got full control of the three axes. Tby jonkeegan - RAMPS Electronics
Having some trouble with getting my stepper motors going as I build my Prusa Mendel IT2 (RAMPS 1.4 / Marlin / Pronterface mac). After getting all of my options set in my Marlin config file, I was able to get my motors moving, but then they would all stop, and the board would have to be cycled to work again. I suspected endtop issues, and read through the forums finding lots of helpful stuff to tby jonkeegan - RAMPS Electronics