Show all posts by user
Java - everyone loves it and it works well everywhere. Maybe.
Page 1 of 2 Pages: 12
Results 1 — 30 of 37
Re: Reprap2: Mendel circuit material - 15 years ago
I've been curious why people have gone about the first generation of PCB-making as an extension of the quite difficult process of extrusion. It would be much simpler to capitalize on the RepRap's ability as a positioning table to use it as a mini-mill to etch 1oz FR1 boards with a 1/64" or 1/32" end mill. There's a nice piece of software used in MIT's Fab Lab called cad.py which governs this (hby Ithacacian - Controllers
Re: Turning off the warm up segment - 16 years ago
Specifically, we can't get the speed to go above 191. It will change when we fiddle around with parameters, but that's obviously much slower than we'd like to be printing, and extremely annoying. How does one change the warmup speed?by Ithacacian - RepRap Host
Non-uniformity in extrusion rate? - 16 years ago
So I've been trying to calibrate my Repstrap to extrude at the correct table speed and extrusion rate combination. I think I've honed in on the right values, and then the extrusion rate will change somewhat, even during a print. Needless to say this completely screws up the print. I'll get through about 2/3 of the widebar.stl, and this will happen, sometimes more, sometimes less. It's not a prby Ithacacian - Mechanics
Software Issues - 16 years ago
Hi guys, I have an issue I'm running into when I'm printing parts. As soon as I start the build, the build progress window displays the little warmup strip off to the left (before its even printed out) but doesn't display anything subsequently, even though I'm able to print the part. What is this? Also, the warmup routine is a little annoying, and I was wondering if anyone knew how to changeby Ithacacian - RepRap Host
Re: McWire vs Darwin in Host software - 16 years ago
My McWire working volume probe cuts out at exactly 30000 steps in the x. Again, don't know if this is some incompatibility, and it's not really a problem, assuming this isn't reflected in the actual build.by Ithacacian - RepRap Host
Re: Cast JBWELD auger bit - 16 years ago
Cast with a bit of fiberglass worked quite well. It had less bubbles than the first one, and it appears to be stronger. For reference, I've attached a picture of the screw bearing a 700g roll of duct tape canitlevered, with no noticeable deformation (certainly not plastic anyway). I think this is probably robust enough to handle pretty much any plastic the JBWELD can handle, with its max workiby Ithacacian - Mechanics
Re: Extruder Questions - 16 years ago
Do you have a mouser part# for the thermistor you ordered, Demented? I saw your post here: Also, did you go about calculating new R_z, beta, etc. or did you use the values calculated by someone else? Either way, do you have them for reference? Thanks,by Ithacacian - Mechanics
Re: Extruder Questions - 16 years ago
Just fyi for anyone building the mcwire with pic electronics, I switched the wires doing a complete reverse (as instructed on the stepper wiring page for the pic) and its working fine. There wasn't anything special to wiring "backwards." On a separate note, I'm still having the same problem with the thermistor temperature not reading correctly. With the correct C3, it reads 10 low at room tempby Ithacacian - Mechanics
Re: Full release of the mechanical design - 16 years ago
The features do not show up on the feature tree in Solidworks, if that is what you mean. However, selecting a face does not result in one triangle of the face being selected, as I believe it would in .stl. Curves are reduced to a series of rectangles, yes, but if you want to edit the part, you can extrude or cut with new sketches, and use existing faces in the part for reference.by Ithacacian - Mechanics
Re: Cast JBWELD auger bit - 16 years ago
Nophead, That was good advice. It made it a lot harder and less flexible. I would say it's eminently workable now. Still bends a little when I flex it, but much less, and torsionally, looks like there's no deformation at all at the torque the solarbotics motor puts out. I still cast another one with some fiberglass strand mixed loosely in. When mixing it in the pot, it tended to lump togethby Ithacacian - Mechanics
Re: Full release of the mechanical design - 16 years ago
I tried opening the .stl files in Solidworks 2007, then saving them to .igs and .step files. It didn't like it one bit, complaining there was no solid object. I could save it as a Solidworks .part file but converting that .part file to .igs threw the same error. Update: Downloading the trial of the Solidworks add-in Import .stl allowed me to import the geometry and not just the graphics. I waby Ithacacian - Mechanics
Cast JBWELD auger bit - 16 years ago
So I've been trying to build upon Adrian's findings for a pellet feed extruder head, found here: One of his main problems was unwanted heat transfer up the drive screw, for which he recommended casting the screw out of JBWELD. I've been experimenting with doing this. I tried what seemed to me the easiest and most widely available solution, hardware builders silicone, in several variations.by Ithacacian - Mechanics
Re: Extruder Questions - 16 years ago
Upon further reflection, the issue with the z-axis makes sense. Darwin starts high and goes low. McWire starts low and goes high. The following post has some discussion on the matter: Zach says to plug the motor in backwards. Is this exactly how it sounds? i.e. if the harness would fit in the plug like that, just taking it out as is and reversing direction? Or are there power wires thatby Ithacacian - Mechanics
Extruder Questions - 16 years ago
Hello, During the extruder exerciser test, I noticed that upon startup, the value (ostensibly room temperature) for the thermistor temperature is about 10 deg. C low. This is with the 10nF cap at C3 suggested in the wiki, using the standard RRRF thermistor. I didn't bother to go about changing the numbers for R_z or the other parameters which relate to the physical thermistor and circuit propeby Ithacacian - Mechanics
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
I have the torque set to 100% for each, but that wasn't the problem. As Nophead suggested, I put a resistor in series and this solved both the erratic stepper behavior and the power supply dying. I relooked at the wiki to see if this was just me ignoring instructions. I recall looking at the part of the power supply page that stated if you can't turn your supply on, try a shunt resistor. Butby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
So it seems the RXTX warning issue is perfectly natural. I noticed that I didn't get it when I would start up, only subsequently. Apparently if you open your usb->serial connection and don't have code to close it, it creates a file which is purged when you restart, throwing the warning. So I don't think that's the problem. Also, the LiveCD doesn't work on a Dell XPSM1330 or an Intel MacBooby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
Hi all again, So I've been continuing to test what could be wrong. Disconnected the power comms board and retested with minicom. Check. Compared all the resistors and capacitors on all the boards with pictures and resistor chart. Check. Ensured steppers were all wired properly. Check. Rewent through all the developers and software installation instructions. The only thing I found was thatby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
I don't think it's a permission issue. I reverified that I am a member of dialout and dip, though the code posted on the wiki referencing moduser didn't work for me. Moot point though. I saw on a different forum how some people had problems with the vanilla rxtx downloaded with synaptic package manager throwing this error, and I saw Zach had some similar errors debugging the Arduino code to woby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
This is what is printed out when debug == true Java 3D WARNING : reported GLX version = 1.2 GLX version 1.3 or higher is required The reported version number may be incorrect. There is a known ATI driver bug in glXQueryVersion that incorrectly reports the GLX version as 1.2 when it really is 1.3, so Java 3D will attempt to run anyway. DEBUG: Opening port /dev/ttyUSB0 [0.000sby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
After trying to slide the z bar in the stepper exerciser, I get the following error (appended to what was listed above): comms: tx 0->4: 5 e6 80 3e [7.410s/6993ms] comms: rx: 54 52 30 0 4 60 [7.437s/27ms] comms: tx 0->4: 5 e6 88 42 [7.462s/25ms] comms: rx: 54 52 30 0 4 60 [7.501s/39ms] comms: tx 0->4: 5 e6 ba 5a [7.509s/8ms] comms: rx: 54 52 30 0 4 60 [7.557s/48ms] comms: tx 0->by Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
Turned on commsdebug == true and got the following error in console when I opened up the stepper exerciser: Native lib Version = RXTX-2.1-7 Java lib Version = RXTX-2.1-7 RXTX Warning: Removing stale lock file. /var/lock/LCK..ttyUSB0 comms: tx 0->8: 0 [0.000s/-1207430756607ms] comms: rx: 52 30 0 8 c3 54 51 33 0 8 0 0 2 15 [0.024s/24ms] Received data packet when expecting ACK sendMessage eby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
Update: Now the x and y are sometimes dying after two turns as well in the stepper exerciser dialog. I changed nothing except using the host software on a different computer running linux natively. Now the x and y don't appear to be working properly on either computer. The working volume probe still has its old behavior though, including partially working x and y, and fully working z.by Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
Hello again, So I've been trying to check off possible things it could be. I reprogrammed each pic, rewired all the boards and pulled on all the cables, etc., even matching them up to the flow chart on the wiki of comms->x->y->z->extruder->comms with sync pins wired. After this was done, the x still worked as it had been, and the y now appears to be working fine as well. The zby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
I just conducted one other test which I think is illustrative and would tend to make me believe that the problem is in the firmware (or how it got coded to the Pic, or in the Pic itself). Maybe this is the result of the pic being damaged or fried, or the programming garbling a byte or two. Or maybe there's some incompatibility between McWire and Darwin, though I doubt that. So I put the x picby Ithacacian - Controllers
Re: Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
This is using the original Pic electronics. Note I also just tried syncing x->y->z pin 1 to pin 1 to pin 1 and pin 2 to pin 2 to pin 2. Same behavior.by Ithacacian - Controllers
Strange Stepper Exerciser Behavior with McWire, and some McWire Comments - 16 years ago
Hi, I've just completed the mechanical setup for the McWire and have started hooking up all the electronics. My compliments to Zach for his guide, I followed it pretty closely. However, I'm getting some strange behavior when all the boards are set up in their loop, connected to the stages they drive. To preface, I did and passed all the tests described in the UCB and motor controller fabricby Ithacacian - Controllers
Re: RepRap Shops on Make: - 16 years ago
Hi, I was wondering if there had been any progress or changes in the status of all or parts of the extruder kit. I've got all the electronics working now on my Repstrap and will in short order be moving on to the extruder head. Unfortunately, it appears the extruder kit is out of stock and from what I've read, may remain so for quite a while. It looks like the screw, heating barrel, and the otby Ithacacian - General
Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
Update: After I dimmed the lights, I noticed that each character I type in minicom gives a very faint flicker to the Rx and Tx LEDs. I don't really notice much of a flicker in the two DB-9 LEDs. Normal? Abnormal? Thanks again!by Ithacacian - Controllers
Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
Hey, So I figured out the problem. I'm curious if others have had the same issue. There's an obscure compatibility issue, documented at: There's a braille package (brltty), automatically installed as part of Ubuntu I believe, that messes with the connection. Removing it solves the problem. I have one other question, though. I think my board is working fine because when I start minicom, tby Ithacacian - Controllers
Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
My initial question is more about ensuring that I have used minicom correctly. I've fiddled with every likely option, trying to get to a state where its transmitting what I'm typing in the terminal. I just wanted to make sure I knew exactly which option or feature set I should be using. I will go through again with 2 and 3 shorted, though, and see if any of the options work.by Ithacacian - Controllers
Page 1 of 2 Pages: 12