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hmm. both measurements are 93.3 - 93.5 kilo ohms. you're right, something is wrong with the temperature sensor.
by
slade
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RepRap Host
signal to ground was 5.11 volts, and power to ground was 5.14 volts. Could something software related be a problem? because I haven't changed anything since the temperature sensor, XY system and extruder motor were working, I'm just using a different computer with redownloaded software now. I guess I'll take a look at the sensor when I get home tonight, but I'm not sure what could have changed
by
slade
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RepRap Host
also, nothing's responding except for the thermistor. I can't jog any of the axes or turn the extruder on. The motor "glitches" when i try jogging it, but that's it. Strange, because I didn't change the hardware at all since I had the XY positioning system working.
by
slade
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RepRap Host
Thanks for the help! adding the user to the "dialout" group didn't work, but running it as root did.
I have a few more problems now. I can't get the thermistor to register correctly. It reads as 17*C when it's at 100*C. I'm using a B57550G104F EPCOS thermistor (100k, beta = 4085) and i used the python script to generate a thermistor table:
// ./createTemperatureLookup.py --r0=100000 --t0=2
by
slade
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RepRap Host
I'm working on my reprap again after a break due to school. I almost had it working, and now it looks like I've taken a step back. I'm using a different computer now, and it won't connect to the sanguino. I have it on and hooked up, but in the arduino software "Serial Port" is greyed out under "Tools". I tried restarting, hooking up the sanguino to the computer both before and after starting
by
slade
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RepRap Host
I had some slight problems with my extruder motor, but upon fixing them more problems sprang up. As soon as I start the reprap host software, the PWM driver board starts heating the barrel. It heats it to maybe around 60*C, while the output reads a constant 17*C. The thermistor I'm using is the EPCOS 100K Thermistor (B57540G0104F), the thermistor reads 100K ohms at room temperature, and I comp
by
slade
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Controllers
it looks like 0012 has some bugs. I couldn't even get the code to compile in 0012, so I downgraded.
by
slade
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RepRap Host
it didn't do that for me, with arduino software 0011. I can compile, then hit reset and immediately upload the code.
by
slade
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RepRap Host
I actually tried running the Gcode and the Z axis started working fine, as in I had to manually position it for the first pass, but the Z axis would move back up for the second layer, etc. My makeshift solution until I can figure out how to jog the Z axis is just to put a tap handle on the motor and turn it manually. I can home the Z axis by putting something in the opto end stop and removing i
by
slade
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RepRap Host
hmm, and it looks like there's a problem with my extruder. it turns, and the plastic has melted, but nothing's being extruded.
by
slade
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RepRap Host
also, the z axis moves a lot further per jog than either other axis. i noticed that the default parameter "steps per mm" was different for the z axis than the other two, so i set it to the same value. I started playing around with the values, and it doesn't seem to update anything. I changed it by more than an order of magnitude, but the axes moved the same amount.
by
slade
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RepRap Host
yeah, I'm so close but I just wish I could finally print out a part - between family, friends and professors (and people i borrowed equipment from), I have a dozen or so people waiting to see this. I have to do work for my classes first, though.
Let me know if you find anything out, if not I'll take a look at it this weekend. Since we both have the same problem with the same axis, it's most li
by
slade
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RepRap Host
strangely enough, it's working now and I didn't change anything. oh well - i'm not complaining.
although, now the Z axis is acting a bit strange. i can jog it down, but when i try jogging it back up there's just a tiny blip and then it stops. if I press home, nothing happens. i have to put something in between the upper opto end stop and remove it, then press home, and then the axis will mov
by
slade
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RepRap Host
the only thing still not working is the temperature sensor. I double checked the connections, +5V and ground are connected and the signal leads to A4 (D27). I checked the signal voltage and it's around 4.7V, so that means the problem must be either in the sanguino or in software. When I upload the test software to the sanguino nothing happens. it doesn't return the temperature values. And,
by
slade
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RepRap Host
okay, I fixed most of my problems, (hopefully all, we'll see) and I'll post here in case anyone has similar problems.
The compilation error with the gcode is due to the new arduino software. I downgraded to version 011 and now the code uploads to my sanguino. Also I got the following error while trying to create the gcode:
"Exception in thread "Producer" java.lang.OutOfMemoryError: Java heap
by
slade
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RepRap Host
okay, i'm really confusing myself here because all the information is so spread out, there's mixed documentation relating to PIC controllers, the arduino, and the sanguino, and it looks like the gcode interpreter isn't finished yet. I have all the hardware set up with a sanguino and i've verified that i can upload to it. I have the host software installed on my computer. what do I have to uplo
by
slade
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RepRap Host
when I try compiling/uploading the Gcode interpreter, I get:
"In member function 'void extruder::wait_for_temperature()':
In member function 'void extruder::valve_set(bool, int)':
In member function 'void extruder::set_direction(bool)':
At global scope:
In member function 'int extruder::get_temperature()':
At global scope:
In member function 'void extruder::manage()':"
any idea what that means
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slade
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RepRap Host
hmm, looks like I just had to unplug the sanguino from the motherboard, and it uploads fine. I probably should have thought to check that last night. that makes it sort of a pain to upload and test code, though. now I can run the stepper motor test code successfully... on to everything else now.
by
slade
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RepRap Host
I've looked through all the documentation and can't figure out what's wrong here. I set up the arduino program for use with the sanguino board, set the USB port to /dev/ttyUSB0, and can compile the code successfully. but, when I try to upload the software I get:
problem uploading to board
avrdude: stk500_recv(): programmer is not responding
when I plug the sanguino USB into my computer the
by
slade
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RepRap Host
try making a repstrap and the extruder, then print the parts you need for the reprap cartesian structure. that's what I'm doing, all you need for that is a lathe and a mill. I have the drawings for the extruder parts online here somewhere, so you won't need to figure out the dimensions yourself.
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slade
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Wanted
well, by now, I've already made the parts myself. oh well.
by
slade
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Wanted
I thought I'd cross-post these from another thread - some drawings I made a while ago in my spare time of the extruder v1.1 (slightly modified, and some of the dimensions may be slightly off)
by
slade
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Massachusetts, Boston RepRap User Group
man, I made all these models, made the drawings, and then never got around to posting them. sorry guys, i've been busy/apathetic/*insert other excuses here*.
feel free to check over the drawings, some dimensions may be incorrect or there may be other mistakes, so I'll update them as need be. I also modified some of the parts to make the extruder easier to make with a mill and lathe.
Disclai
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slade
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Reprappers
reprap v1.0 is *far* from self reproducing. sure, the concept of a machine able to fully reproduce itself autonomously, from source material to final project, is more "scary" than a retired chemist around a few bottles of asorted supplies. but the average person looking at 1500 random bottles has a "poison! death! anthrax! chemical warfare!" light go off. the average person looking at a rep
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slade
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Massachusetts, Boston RepRap User Group
a house littered with 1500+ jars/vials of chemicals on the floor, furniture, etc., versus a tabletop machine that fits in a cubic meter and heats a plastic filler rod? i don't think it would be an issue. plus, a machine tool doesn't alert the average person in the way 1500 jars of white chemicals does.
it does bring up an interesting point, though, regarding the "zoning" laws. what's the line
by
slade
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Massachusetts, Boston RepRap User Group
does anyone know about what power/wavelength is generally used on a lasercutter? a month or so ago a friend of mine who's doing astro research was asking me if I had a use for a 15 Watt laser, and I'm starting to think of a good use for it...
by the way, I'm in the process of modeling a reprap extruder (v1.1) and creating drawings, since they aren't available anywhere. here's what I have so fa
by
slade
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Massachusetts, Boston RepRap User Group
here's what i have modeled so far:
I'll start on the drawings when I get time.
by
slade
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Reprappers
I just got into an accident on the highway on tuesday going to a meeting at work, so I'm rather busy right now. I'll still try to make it to this though.
by
slade
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Massachusetts, Boston RepRap User Group
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