I'm a machinist, also, and I'd REALLY like the ability to NOT have to configure everything in metric, jog my axes, and draw stuff in metric. I don't want the after conversion I just want to be able to operate naturally in standard, configure all values using standard measurements, and jog my axes around in decimal inches like all of the machines I run at work. I understand why metric is superiorby Bobbitay - Repetier
I just put what I was using...guilty as charged. I have a RAMBO and RAMPS and prefer RAMBO. The overall rigidity is my favorite part. It has better (more rigid) standard connections and is faster/easier to setup for me. Maybe it seems more "idiot-proof". It also runs much cooler, and I've never seen a skipped step...which I did with RAMPS. Oh, and I hated adjusting the pololus. The decrease in heby Bobbitay - Developers
Thanks for the explanation. I understand what the belief is now. To me, I still highly doubt the extruder gears are very accurate gear tooth profiles and that would negate the small amount of backlash retraction tuning we did. I still hold that the filament is too inconsistent to achieve any real effective backlash tuning especially considering that our gears are also, as a whole, not very precby Bobbitay - General
How is backlash accounted for by your retraction distance? It doesn't make a bigger move when going forward again (extruding) no matter what the retraction value is - it will always have the same clearance (backlash) between the gear teeth. I don't think it matters, though.by Bobbitay - General
I'm not sure you are negating anything. I honestly think that backlash is overshadowed by the fact that the filament isn't perfect diametrically or concentrically throughout a spool. The volume output of the filament is going to be less consistent than the amount of backlash at any given moment making any attempt to fix the small amount of backlash we have pointless. Also, theoretically speaking,by Bobbitay - General
Frame: Mendelmax Electronics: rAMBO Firmware Marlin Hotend: Arcol V4 Extruder: Wades Accessible Interface Software: Repetier Host Slicing Software: Slic3rby Bobbitay - Developers
This link may be useful in determining what you are looking for. Why do you want a machine shop to cut your threads? You may save a lot of money just ordering from McMaster or other reprap suppliers with exactly what you need. Unless you are doing a custom ball screw, I'd definitely avoid having custom machined threaded rod, and even then, you really should weigh your options unless money is noby Bobbitay - General
Looking forward to it!by Bobbitay - RepRap magazine
Just thought that I'd say I have the same issue with over filling smaller gaps or just ridiculous amounts of itty-bitty moves that probably would work better in a concentric move instead. The ability to take control of smaller features on a not necessarily small item a little better would be very beneficial on the overall quality of a part without sacrificing so much speed or strength.by Bobbitay - Slic3r
3.175mm is 1/8"...so it should work with at least some hotends. It sure would be interesting to try it. They also have other materials such as Polyethylene and polypropylene as well. The other materials I see under welding rod look like they are straight lengths of plastics...not sure how that'd work out. Maybe someone should give it a try?by Bobbitay - Plastic Extruder Working Group
That is really cool! I actually looked for one of these about a half year ago on thingiverse.by Bobbitay - Look what I made!
Oh okay. I didn't realize they approved each one individually...that seems like a pretty cumbersome requirement. Theoretically, they should check every single application for patent infringement? Even the patent offices (at least in the US) can't seem to keep up with who is infringing on what.by Bobbitay - General
Murrayd: I don't understand how they (3DS) are suing Kickstarter. For "promoting"? Is that kind of like torrent websites "promoting" illegal downloads even if not directly supplied by them? Is Kickstarter liable for intellectual property within their website? Ohioplastics: That is actually a pretty funny article/video considering the current state of Makerbot/Thingiverse. Things have certainly cby Bobbitay - General
One pretty large scale 3D printing project I saw was: Kinda cool I thought.by Bobbitay - General
No problem. I'm glad I could point you to a few different sources. Someone else could chime in if they had any ideas, because I'm sure I've missed something. I seem to find new things all of the time in RepRap. :p I personally use a Wade's Geared extruder and I've seen many prints that are very nice that come off of them and mine works without any issues as of yet. I'm not exactly sure which "coby Bobbitay - Plastic Extruder Working Group
Hey, Welcome to the world of RepRap! If you want to print PC, or other higher temperature materials, it looks like you may have to go with either the Prusa hotend or an Arcol hotend. The Prusa hotend is close to shipping, I believe. The Arcol V4 hotend is already available here: I don't think Arcol sells a .25mm nozzle, but I would strongly recommend you don't go much smaller than .35mm, espeby Bobbitay - Plastic Extruder Working Group
Done! I'd be interested in any statistics you have compiled/analyzed, as well.by Bobbitay - General
I'm in the US and I ordered from Misumi. Cut to length, they came nicely packaged, quickly, and for a very reasonable price.by Bobbitay - Extruded Aluminum Frames
If you have the money, I would definitely recommend buying a kit, even if it's not assembled. They don't cost $3000 and they will drastically reduce headache. Source a printer after you get your first one and understand it better. If I were looking for a kit or to source parts myself I'd personally look into Mendelmax, Rostock, Prusa I2 or I3, and Mendel90.by Bobbitay - General
I have a Mendelmax 1.5, I use leadscrews for the Z axis and belts for the X and Y axis. The software knows (marlin), because you tell it how many steps it takes to move a certain unit of distance. You don't tell marlin what type of rod you have. Here is a calculator that I have used to help me when I got started: Don't use a leadscrew or any type of screw to move the x axis, it will only makeby Bobbitay - General
Is that the only disadvantage? I have a pretty nice new computer I just built, so it would be a better option for me? I've only used Pronterface...I'll give it a try. I always wanted a 3D view.by Bobbitay - General
Very cool. Thanks for sharing that.by Bobbitay - General
Awesome, I may grab one of those since I do have a wade's extruder...by Bobbitay - Plastic Extruder Working Group
Essentially just a copy of the MK7 drive out of a different material with a couple more sizing options to fit different applications? Only for direct drive systems, I guess. They look nice on their own, but I want to see one in an extruder! What extruders are they compatible with?by Bobbitay - Plastic Extruder Working Group
At least a few hot end designs insulate the heater block with ceramic tape to my knowledge.by Bobbitay - General
I did FRC I wish I knew about printing while I was on the team, I didn't learn about it until I started college.by Bobbitay - General
I was on team 1569, Haywire Robotics, a few years ago It was one of the best experiences of my life. We went to Portland and Seattle regionals and we went to Atlanta for the national event after winning in Seattle. That is cool you are mentoring a team. I wish I had time, but I might next year.by Bobbitay - General
mars bonfire Wrote: ------------------------------------------------------- > Don't know what is more interesting on this > thread...the new hot end design or the comments > (More efficient resistors????). Anyway, I > digress: > > While the proof is in the pudding, this looks like > a potentially very elegant and effective design. > It looks (as best I can determine froby Bobbitay - General
It doesn't appear to be one piece to me...it has a slit cut out of the heating block that I assume allows you to tighten the upper portion into the heating block. Also, a fan would do little good for stainless steel. It is a great insulator, but there is a reason they don't make very many heatsinks out of stainless steel. I would guess that it's tapered at the nozzle point some internally, but I'by Bobbitay - General
I'm a machinist and I know stainless certainly isn't easier to machine than copper, bronze, aluminum, or brass. You can use cheaper tooling for those metals and maintain decent speed of machining. Stainless you can get away with using some cheap tooling, but it will dramatically slow down production, so you lose money in the machining time...and that is usually more expensive than tooling. "Foodby Bobbitay - General