Strange, because I actually searched for it before posting and got nothing.by sheepdog43 - General
Apparently Makerbot has been watching what we as a community are doing and trying to patent it. Some info here: Reprap user Whosa Whatsis has some as on it as well on his Google+ page:by sheepdog43 - General
Is there a reason you chose this particular model? This model is still listed as experimental, even though it's well over 2 years old. We have come quite a ways since then in terms of cost, speed, reliability, and ease of use. My advice is look for something that either has, or at least parts are available to make it auto level or calibrate. This will make your life much easier.by sheepdog43 - General
Change your baud rate, some speeds work, others only partially work, I'm betting this is what you are seeing. 115,200 seems the most consistent.by sheepdog43 - Repetier
Deltas are over 2 years old, have 2 or 3 generations of designs and several manufacturers, it's time to stop saying it's expermental. Are they evolving at a high rate, yes, but deltas have been stable for quite some time. And yes, calibration can be a b*tch (if you do it manually), but that is one area they have really had A LOT of development recently. My last delta took a total of 20 minutes toby sheepdog43 - General
Quotegeorgi You seem to overestimate my abilities by a large margin My XMOS startup kit is due to arrive today, and I haven't programmed a microcontroller, save for a brief exercize with a PIC some 10 years ago. A great concern right now for example is how am I going to soldier the driver chip in TSSOP-38 package, seems I'll have to do a refresher how to make PCBs at home. I never was very goodby sheepdog43 - Delta Machines
Your chance of faillure if you are determined are slim, it's just a matter of how good the end result is, you would be surprised at how little mass it takes to effect the top speed of a delta. I don't mean to be a downer, and I'm not trying to see you fail, I hope it works. Regardless, post pics, it should be interesting to see.by sheepdog43 - Delta Machines
I had a Rostock, it worked well, but I think you may be missguided on it's benefits. Like others, I moved away from it for a reason. At any rate, I fail to see the point of building a delta the way you are envisioning. Deltas are harder to enclose, and with the changes you plan on making, a delta is completely out of it's element. Deltas are meant for light weight, high speed, precise operationby sheepdog43 - Delta Machines
Quotegeorgi Thank you for the elaborate answer. I find the direct drive delta the most fascinating design, that's the reason I was asking. My intention is to build and program a controller and motor drivers myself anyway (I got attracted to 3d printers while looking for some embedded programming project to do). If it starts to look that I'm successfull with these I think I'm going to try buildinby sheepdog43 - Delta Machines
Many of those listed on that page aren't even 3d printers, they are delta robots. Those designs are extremely complex, fickle in nature, and often costly. Soem require more poerfull motors, which means electronics will be difficult, change the electronics and you need new firmware, which means writing your own delta code since only some boards are compatible. The first practical, home 3d delta pby sheepdog43 - Delta Machines
Looks but, but I see a few problems. You have what appears to be two 40mm fans blowing in, and in the first pic, no exit, and in the latter version a small amount. Another issue I see, is very little air flow out the end where connections are made, this limits the air flow over the heated be mosfet. Considering I've burned out 2 of them on a power hungry bed, I would say that will be an issue fby sheepdog43 - Look what I made!
Some people have managed to run their printers on Beaglebones, search the deltabot group on Google. I can't be of much help, but maybe that will point you in the right direction.by sheepdog43 - Developers
Seal the ends with with glue when finished, not just inside where your set screws go.by sheepdog43 - Delta Machines
So you spend $15 to buy a drill, tear it apart, hack a way for Ardiuno to controll it, and then battle accuracy issues... When you could just buy a $10-15 stepper that you know will plug in and work? Yes, you would have more torque, but we have as much as we need, I have a 1000mm tall delta that runs fine on used $10 steppers. I get that everyone wants a cheaper way, but when you can buy a usedby sheepdog43 - Developers
This is why printed parts (FFD anyhow) are not really considered food safe, despite using food safe materials, there are always micro cracks where moisture can get trapped. A coating is the only way you will ensure that it's 100% water tight.by sheepdog43 - Developers
Extruders don't usually limit your print speed, they can move plenty fast. Remember, every mm of filament is 3.5mm to 5mm of extrusion out of the nozzle, at 200mm per second, your extruder only needs to push 57mm of filament (at most). Even heavily geared down, it's not likely to be much, if any, faster than your movement steppers are moving. I have had mine up to (an honest) 280-300mm per sec,by sheepdog43 - Delta Machines
$300? No. Sorry, it's just not likely to happen for a delta, much less a cartesian. Most printers have nearly $200 in electronics and hot end alone, very little of which you will find laying around as scrap. You also need some sort of accurate linear motion. Bearings add up fast, and linear rails of any sort cost even more. Motors and power supplies you can find scrap, but also cheap. Yes, youby sheepdog43 - Developers
Try different speeds, mine all work best at 115,200 Also, just because Arduino will connect to it at one speed, doesn't mean Pronterface or Repetier will.by sheepdog43 - RAMPS Electronics
1.75mm, almost no delta uses 3mm and many cartesians are moving to it these days. With a .4, you will be pushing it pretty hard, but it will work. Just make sure you don't crank up the amps too high on the driver and I wouldn't go any smaller on your head size. It can still get pretty warm on a long print. One thing I like to do on all of my extruders, is if you have an old motherboard, take theby sheepdog43 - Delta Machines
Yes, it is less likely to squish the filament (to some extent), however, while you may get higher pressure on the hobb and therefore more grip, like Hazer said, adding surface to an idler does not itself multiply grip. I have another issue with designs like this though, and that is that you are wedging the filament between the two bearings. This pushes them out, and this can cause friction. Ifby sheepdog43 - Delta Machines
Quote3DRapidClone I see! The 5:1 geared nema stepper is a bit over geared right? So it slows retraction a bit? Seen anyone try to gear it down to 3:1 if that's even necessary? Im hoping an astroyn damper will fit too but it probably won't due to it needing to be close together. You would be doing double duty and getting the worst of both systems, the complexity, ineficiency, and hassle of a geareby sheepdog43 - Delta Machines
.35 is finicky and .4 is a great size actually. I found the jump between .5 to .4 to be not bad, going down to .35 though, seemed like a big jump. I suspect that dust and things have a much easier time passing through .4 than compared to a .35. Knowing what I know now, I would probably just go with a .4, unfortunately, a good .4mm head isn't always easy to come by. Most Wades are not made for Boby sheepdog43 - Delta Machines
Quote3DRapidClone Wow thanks again sheepdog. I'll look into the berrytripper. So many derivatives to look at You're welcome. I would think the 3DR and Accessible Wades would probably be a bit better. The Berry really is an Airtripper with gears, as such, it's a bit over complicated and lacks a filament quick release. Something you will miss once you have had it. Even the creator of it has moved oby sheepdog43 - Delta Machines
A larger effector is a bit more stable I have found but you may lose some print size. The Kossel mini effector is about as small as I would consider. I prefer my extruder mounted on top, pointing horizontal. I did my Rostock in the middle pointing up, so the bowden made a "U" shape and it always flopped all over. I also trid center mounting horizontal, that didn't work well either. Mounted atby sheepdog43 - Delta Machines
This is happening agin this friday for those interested.by sheepdog43 - Missouri, Saint Louis RepRap User Group
I'll be at the STL 3d Printer Meetup at Arch Reactor with at least one of my Griffins on the 28th, I'd be happy to do some for you there if you want. I live about 60 miles outside of St. Louis so it wouldn't be easy to get you the parts before then. Whether you get parts by then or not, come to the meetup, and bring what you have. We welcome anyone, printer or no, working or not, and always likby sheepdog43 - Missouri, Saint Louis RepRap User Group
Friday night is another meeting at Arch Reactor. There should be a good selection of printers to see, including the Griffin twins.by sheepdog43 - Missouri, Saint Louis RepRap User Group
There are plenty of good, and cheaper options out there. Personally, I like Ultimaker, Toybuilderlabs, Makerbot, and Toner Plastics, all of them work great in my big machine (even with a bad thermister). Those are the more expensive ones and they are still cheaper and faster than ordering from Europe. I can almost guarantee you, these are the same or better quality.by sheepdog43 - Missouri, Saint Louis RepRap User Group
Microcenter in Brentwood is also carrying filament now.by sheepdog43 - Missouri, Saint Louis RepRap User Group
While I only lurk here on occasion, I was at the meeting. I had the two Griffin delta printers*. We tend to get a good showing at the monthly meetings, with many different printers on display and a mix of experienced vs those just getting interested in 3d printers. Often times we have speakers, or demonstrations as well. It's a good bunch of people, and a nice selection of printers, and whetherby sheepdog43 - Missouri, Saint Louis RepRap User Group