I've attached some pictures of my test box and was wondering what settings I should be playing around with to reduce the number of bubbles in the print and the slight waviness of the lines. Any software ideas, or is it likely a mechanical flaw? Thanks!by Andrew Diehl - Skeinforge
Have you tried manually sending commands to it with hyperteminal (or similar)?by Andrew Diehl - General Mendel Topics
So, I've got Teacup running on my handy 328 and finally got repG to communicate with it. I can even load g-codes and get xyz automated axis movements. The realtime control feature is working fine for the xyz axis but I can't seem to figure out how to make it work with the stepper extruder for some reason. I'm assuming you should be able to input a pmw or rpm into the box and it should start moviby Andrew Diehl - Firmware - experimental, borrowed, and future
richrap Wrote: ------------------------------------------------------- > Hi Andrew > > That's a nice layout, good job. > > It maybe nice to have a local 5v regulator option > so you don't need to route it from the main-board > (if it's being used separately). I'm not sure it's worth the added cost. Running a 5v wire is simple since you are already running all the step/dirby Andrew Diehl - Controllers
I've done that to 4983's by removing the sense resistor. I'm sure other shorts can cause it as well.by Andrew Diehl - RAMPS Electronics
I just finished assembling the first prototype. Works perfectly so far, no magic smoke! It's a remake of the A4983 chips used on the pololu stepper driver board. The difference is there are built in microstepping selectors, reverse polarity protection, and indicator led's for logic power, driver power, and step inputs. All the parts are 0803 or larger for reliability. Lots of space was left aroby Andrew Diehl - Controllers
I think this thread has evolved from the tag line to "low cost mass produced plastic parts." I'm sure anyone producing the plastic in volume will be primarily selling to those producing kits if not making kits themselves. I, personally, am aiming for the "one stop shop" approach.by Andrew Diehl - Plastic RepRap Parts for Sale
I have an extruder set up for it but don't have a working printer at the moment. The stuff sold locally is 2.4mm and works with a standard extruder more or less. When operating the extruder by hand It seems like the nylon shrinks significantly compared to abs, though. Not 100% sure what i'm using is pure nylon, either.by Andrew Diehl - General
Just a thought, many of the parts so far are pretty easy to make by hand/powertools out of wood/plastic. It might be a good idea to think about making as much of the machine like that as you can. You said your friend has a makerbot, but relying on others for critical parts can cause severe delays in your progress.by Andrew Diehl - Reprappers
I'm going to guess the max camera temperature is less than 230C? (hence why everything looks as hot as the plastic)by Andrew Diehl - General
Yes. Technically speaking, both those connectors should also be the same temperature as where the thermocouple reading chip on the circuit board is. A couple degrees off will only slightly affect the reading, though.by Andrew Diehl - General
It doesn't have to be the same kind of metal as long as the junctions are the same temperature. Quite frankly it's not worth the added expense as long as the extension junction and the on chip junction are at approx room temperature.by Andrew Diehl - General
Yes it can. As long as both pins on the connector remain the same temperature it works perfectly.by Andrew Diehl - General
Really large parts can take up to a day. I know of the existence of some of the dissolving support materials, but I haven't seen it's adoption into the community as of yet. "If I print the bottom gasket groove and plate relief onto the raft, then stop and change to the abs will the mendel be able to properly register the abs printing over the support material?? " Probably not. At BEST, withby Andrew Diehl - General
Have there been any objects printed with nylon yet?by Andrew Diehl - General
JohnS Wrote: ------------------------------------------------------- > I'm looking for a way to make components for a > device what reduces emissions and saves fuel in > internal combustion engines > molding the end caps, cell manifolds and fluid > distribution blocks was considered, but issues > with sizing and prototype cycles have created a > major cost problem. > >by Andrew Diehl - General
When I open this in SW 2010 the threaded and smooth rods go into an (so far) irreversibly suppressed state. Also, mate 56 is overdefined. Probably just a compatibility issue, but I figured I would make you aware. (SOLVED) The file naming convention for the rods is weird. In windows 7 it changed the "x" in 8mm(x)405mm, since it appears to be a non-standard character (looks like a multiply sby Andrew Diehl - General Mendel Topics
How will you bee keeping the extruder/bed from rotating freely with only one round rod? Also note, threaded rod will have a lot of backlash when used for an x and y axis. We get away with it for the Z because the dynamic forces are very small compared to gravity, which always makes the same "side" of the threads in contact with the nut.by Andrew Diehl - Reprappers
I have a BS in Mechanical Engineering, graduated in 2009 from Penn State. I have not personally cast any significant number of parts myself. I was involved with a group who did plastic castings for wind turbine blades, though. The cast parts were every bit as strong as identical parts printed on a Statasys FDM 2000. We sanded, filled, and painted the printed parts and used it as a master for thby Andrew Diehl - Plastic RepRap Parts for Sale
Nobody cares how something is made. Only how much it costs, how well they perceive it will perform, and how it LOOKS. Casting is better than printing on all counts. Injection molding is better than casting on all counts. As quantity increases, it is an obvious progression to move from printing, to casting, to injection molding. The supposed success of casting is proving the quantity of demandby Andrew Diehl - Plastic RepRap Parts for Sale
Problem is all the band heaters out there are for 120V+ I'm looking into getting a run of 12V ones made. All the current heater solutions are pretty bad so something like this has to happen eventually.by Andrew Diehl - Plastic Extruder Working Group
Don't worry. We've got a few improvements of our own and do not plan on limiting ourselves by the "current" design. Plus, as long as it works well and is inexpensive, the specific version age is rather trivial.by Andrew Diehl - Plastic RepRap Parts for Sale
It looks like a serious effort is about to begin to make a Mendel style set of injection molded parts. Keep your eyes peeled. Some pretty awesome things might start to appear before 2012 rolls aroundby Andrew Diehl - Plastic RepRap Parts for Sale
I think you are confusing filament size and nozzle diameter. The diameter of the nozzle determines how fine of a layer can be extruded, not the diameter of filament fed into the nozzle. The diameter of the filament has so far settled on 1.75mm or 3mm. The smaller filament requires a smaller stepper to achieve the same nozzle pressure, but at the risk of kinked filament. VXB.com sells very rby Andrew Diehl - Reprappers
You will not improve upon a high accuracy CNC platform with an extruder mounted on it. If it can mill metal to under +-.001 in it can extrude plastic to at least that. The height of an extruded 'liquid' plastic bead is so short even the apparently sudden movement on the platform will have no real effect on it's position until it cools. Not to mention the speed is easily controlled.by Andrew Diehl - Reprappers
Ahh, but the question is in what quantity/time can you produce them, and at what quality? I want picturesby Andrew Diehl - For Sale
I learned the program baud rate is NOT THE SAME as the baud rate used to communicate between Host and Teacup. 115200 is the correct setting in host.by Andrew Diehl - RepRap Host
Changing the settings to 115200 worked! It's really confusing that there are different speeds for different things. I assumed incorrectly setting the 57600 in the firmware was for the communication for the host. Finally have a stepper moving a little bit with the "nudge axis position" Seems to be trying to step at an awkward rate still and won't work for more than a .1mm nudge. Computer contrby Andrew Diehl - Firmware - experimental, borrowed, and future
Hello again! I have (Formerly 5D for arduino release branch) on an atmega 328. When I try and run the host software I get to the initializing arduino/sanguino, the sending N0 M110 *3 (dequed and sent) and then nothing... I get the impression the host is waiting for something to be sent back that isn't. The entire screen is here I've also tried using hyper terminal to contact the Arduino,by Andrew Diehl - Firmware - experimental, borrowed, and future
For better or worse, I'm building a repstrap and another generation of reprap electronics to sell. I'm in Allentown PA.by Andrew Diehl - Pennsylvania RepRap User Group