I was reading old posts and came across something to indicate that maybe the extruder doesn't work at very low speeds. (Sorry, reading through all the old posts lately, and I don't remember where I saw the comment) This is a bit of a concern for me - my table only moves at 2.5mm/sec right now. So what is the minimum/maximum axis translation for the current mk II extruder design? Including streby jgilmore - Mechanics
Enrique, I can't get there. I don't have a registration, and I can't get one either. It doesn't respond to the same login/pw as the forums, gives me an error page. I click the registration link on the error page and get the following message: "Sorry, but at the moment we're restricting wiki write access to the core development team, because we need to keep track of documentation changes before tby jgilmore - RepRap Host
In my experimenting, I have uncovered what seems to be a bug in the gcode firmware. I think it's actually two bugs. In inches mode with relative positioning, I issued a command: "G3 I2.5 J0 X0 Y0" Which should inscribe a 5" circle. There are three problems with what my machine actually did: 1. The figure it drew is 2.5", not 5". This is probably a bug in the firmware, and could be fixed somewheby jgilmore - RepRap Host
Enrique, I am willing to write more documentation for it if you feel that would be good. There's not much to write, but I suppose I can wax loquacious if the occasion demands. And I do have a tendancy to talk to little when it comes to telling people how to use things I've written. So where did you want it? (I.E. on which wiki/which page?) It does sound like Marius and the good folks at reprapby jgilmore - RepRap Host
So. I downloaded it, and now have a massive gcode file. This is nice, but what I really want right now is a CAM interface to the arduino gcode interpreter. I have a hand-written snippet of gcode that I'd like to dump to it. It'd also be nice to be able to "jog" the machine to the proper starting points. What are you using to feed the gcode file to the arduino? And is there a "jog" type interfby jgilmore - RepRap Host
I like the multiplexing via hooking both switches for a given axis in series. It makes sense, prevents more crashes, and is easy to wire up. It's also reasonable to assume that the switch that is "on" when starting up is the "min" switch. It would be very usual for the machine to stop at the max position. It could happen though and would result in a crash if it did. To further reduce the chanceby jgilmore - Controllers
I like the multiplexing via hooking both switches for a given axis in series. It makes sense, prevents more crashes, and is easy to wire up. It's also reasonable to assume that the switch that is "on" when starting up is the "min" switch. It would be very usual for the machine to stop at the max position. It could happen though, and would result in a crash if it did. To further reduce the chaby jgilmore - Controllers
This is Awesome! If I read this thread correctly, it's now possible to print something without using java at all. This is wonderful news. Now if only I had an extruder...by jgilmore - RepRap Host
I think you're right. The pipe I have isn't painted, it's coated in some sort of oily substance. Home Depot labeled it as "black steel pipe" but it's not wielded pipe, so I suspect that it's not steel, or is a really low-grade steel. Bottom line of course is that it worked for me. Drilled OK, the screws self-threaded, and it went together without much fuss, or requiring a pipe wrench. I didn'tby jgilmore - Mechanics
My McWire is made from the black steel pipe. Didn't have any problems with the screws, but maybe I was using different screws. I don't have it working yet - the X and Y are in place, but the bearings aren't right and I haven't even started on the Z. I've been distracted by getting the steppers to work - using the arduino with a found stepper driver board.by jgilmore - Mechanics
Thank you. saves me deleting it when I download a new version, and a bit of confusion for the new folks. I noticed with the latest that there's a "reprap-host" and a "reprap-host.sh". This may also cause confusion. reprap-host.sh is the simple one-liner, and reprap-host has stuff for setting a custom classpath. A custom classpath is going to be either distributed with the host software, or speby jgilmore - RepRap Host
Since this seems to have changed into discussion of the arduino firmware problems... I have modified the RepStepper.cpp to handle my found stepper driver board. It takes two pins still, but instead of step and direction, it takes coil 0 polarity and coil 1 polarity. So it needs a gray code counter on these pins, and a "state" tracking variable in RepStepper.h. I also didn't like the java interfby jgilmore - RepRap Host
The windows .bat file should NOT have the executable bit set. Windows looks at the extension anyway, and command line completion is a bit cleaner for us unix folks. Unless some version of windows DOES need the executable bit set. I wouldn't think so, as it's a Unix file attribute, but I have no way of testing this.by jgilmore - RepRap Host
After reformating and reinstalling, I still couldn't get the reprap host software to work. And this is the reason why. That you for posting this. I still, mind you, think that the host software is bloated. I think it should consist of several smaller utilities for slice-n-dice, fill patterns, stepper exercisers, etc. It could even have a "build animation" as the last step. That'd be much more acby jgilmore - RepRap Host
Actually, my machine is a single processor AMD athlon. I don't think it was a matter of j3d not knowing what to do with it, because it crashing in libc, before returning the the java enviroment with the number of processors. I can't find any documentation on __sysconf or get_nprocs, which is the functions that java says it was trying to call. The function names given in the stack track for libc mby jgilmore - RepRap Host
Sorry, I'm running debian linux. Actually, I removed sun-java5-* and reinstalled. Same error. Then I installed sun-java6-*, same error. Then I swore at it and gave up. I did manage to bork my install of gcj-java (I forget the package names) and had to remove (--force-all with dpkg) and reinstall to get my gcj jre back. Personally, I only have three jre's - gcj, sun-java5, and sun-java6. Both ofby jgilmore - RepRap Host
I've got what I consider quite a ways to building a McWire RepStrap. I've got the steppers and the board to power them - scavanged from the dumpster at AE here in fort collins, co. Used to be part of a high power radio frequency power supply for etching microchips, but whatever. I've got a friend (a machinist, actually) helping me with construction of the McWire frame, and that's approaching compby jgilmore - RepRap Host