Wow, I'd forgotten about Active Surplus. I used to work at a shop just down the street - probably long gone now. That was back in the early 80s. Good to know Active Surplus is still alive and well, though.by degroof - RepRap Host
I saw the "dud axis" messages too. It seems to be in GenericRepRap.loadMotors(). It's creating three NullStepperMotor objects like this: motorX = new NullStepperMotor('X'); motorY = new NullStepperMotor('Y'); motorZ = new NullStepperMotor('Z'); The problem is that NullStepperMotor superclass GenericStepperMotor is expecting an integer that's either 1,2 or 3 (for x,y and z). I found I coulby degroof - RepRap Host
Very nice. I'd considered using a heated bed but didn't think of using a PCB. Great idea. Please add this to the builders' wiki as soon as you can.by degroof - Mechanics
I was just about to post this myself. It'd be interesting to get a few sample Darwin parts printed to see how they measure up.by degroof - General
I've made sodium acetate from vinegar and baking soda before. Here's my instructable: I found that it wasn't pure enough to use as "hot ice". The impurities cause it to crystallize too easily. I later found someone else's instructable, which apparently produces a much better result:by degroof - General
What's the most flexible material we can extrude? PCL? ABS? I wonder how well something like Plasti-Dip (air-drying rubber) would do with a paste extruder.by degroof - Plastic Extruder Working Group
I was assuming you'd print the belt on-edge in a continuous, zig-zag loop. I figured printing flat pieces would limit the length.by degroof - Plastic Extruder Working Group
I wonder if you could print a belt, then embed wire (or wire mesh) post-print by heating it.by degroof - Plastic Extruder Working Group
Have a look at this: Would be interesting to have that as a front end.by degroof - General
peteredworthy Wrote: ------------------------------------------------------- > I've thrown together a somewhat prescriptive page > > Looks good. I've orphaned-out my build guide skeleton in favor of this one, to avoid confusion.by degroof - General
peteredworthy Wrote: > > Steve: I don't see why linux would be the prefered > environment for the easy route or is it root ;-} No particular reason other than it's a) open source and b) outside the Mac / Windows religious war.by degroof - General
Leav Wrote: ------------------------------------------------------- > Like I said earlier, I think the best option would > be to have a completely new wiki, which we can > edit until it's ready to be moved in place of all > the current websites and wikis. The wiki Adrian mentioned above is a new wiki. Well, it shares space with the objects wiki but that shouldn't cause too much troby degroof - General
Demented Chihuahua Wrote: ------------------------------------------------------- > No offense to anyone... > > The suggested build guide you posted, Steve, > suffers from the same problem as the front page of > RepRap...namely, you branch off into > oblivion...which reprap do I want to make? Pic or > Arduino? What bot type? Laser cut or McWire or > Darwin? The newbie doeby degroof - General
sid Wrote: ------------------------------------------------------- > well not exactly > > split electronics from mechanics (just like in the > current how2) > then create a simple mask. > > just as simple as you did with the gcode php > case "sanguino": $tron = "sanguino.php"; break; > case "arduino": $tron = "arduino.php"; break; > and so forth > the same withby degroof - General
Adrian Bowyer Wrote: ------------------------------------------------------- > I very definitely agree that we need to sort out > documentation for new users. At the moment it's > written for our reference (this is clearly needed > too) rather than for someone coming to the project > for the first time. > > That's why we've started up the Builder's Wiki at > > >by degroof - General
I just had a look at pricewatch and they have no-OS systems listed as low as $150 that might be suitable. I recently put together a Linux system for the kids using a no-OS system from ascendtech for about $400. It'd be interesting to see how cheap a system you could run this stuff on.by degroof - RepRap Host
Trying to interpret this by looking at various doc pages... RepRap SNAP comms: Extruder commands: SNAP docs: If I understand the debug messages correctly, the host is sending command 0 to extruder 1. Command 0 is "get version". The first time the host sends this, it gets this response: 54 52 30 0 8 c3 54 - sync byte 52 - HDB2 (ack response) 30 - HDB1 (0 data bytes) 00 - destination = hostby degroof - Mechanics
1. It should be possible. You'd need to increase the lengths of the 4 upright rods, the 8 diagonals and the threaded Z rods. I think that's it. Might need to adjust some of the wire lengths too. 2. Depends on your work vs money ledger. If you don't mind extra work to save money, go with a repstrap. If you'd prefer to spend money to avoid extra work, buy a kit from BitsFromBytes. 3. I doubt thby degroof - General
You could drive a rheostat with a servo motor.by degroof - Mechanics
I think you're both saying the same thing. I probably would've expressed it as "about 70% of the torque".by degroof - General
Well, that's a step in the right direction, at least. Now, the way a build is supposed to work is this sequence. At least this is what happens with mine. I'm using 0.8.3 with PIC firmware. 1. home X and Y 2. home Z 3. move X and Y to start position 4. Z up and down a bit (I think to the start position) 5. heater on (plus warmup) 6. Z up and down a bit 7. draw a long U shape to prime the extrudeby degroof - Controllers
When homing, the head moves faster than when it's moving to the starting position. It sounds like the steppers aren't generating enough torque at the higher speed to move the head. Assuming all your hardware and electronics are OK, I can think of two other ways that could happen: 1. XAxisTorque and YAxisTorque aren't set high enough. 2. MaximumFeedrateX and MaximumFeedrateY (arduino) or FastSpeby degroof - Controllers
Found this: What caught my eye was the passage "In July of 2008 the first parent machine, the RepRap replicated its own 'daughter' machine which has also gone on to replicate itself a number of times."by degroof - General
1. I've got ABS that varies from 2.9mm to 3.1mm and it seems to work OK. Not sure what the outer limits would be. 2. Yes, you will drive yourself insane. 3. I've been thinking about some sort of splicing tool. Something like a pair of pliers with two 3mm half pipes and some sort of heating element.by degroof - Reprappers
Other suggestions I've gotten: pumice, foam rubber matby degroof - Mechanics
I've been asking random acquaintances the following question: "Can you think of anything that's about 1' square, 1/4" thick, porous, rigid and reasonably heat-resistant?" I've gotten a lot of blank looks but I've also gotten "unglazed ceramic tile" a few times now. Might be worth a try. I wonder what would happen if you warmed it in the oven first.by degroof - Mechanics
One thing I'd like to try is melting down failed prints and rolling them out into rafts. Maybe texture them to make separation easier.by degroof - Mechanics