Isaac Mendel build
Posted by jkelso
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Re: Isaac Mendel build September 26, 2010 04:01PM |
After frying that chip because a wire came loose from the "chocolate block" I decided that I needed something better. This longer "barrier strip" I bought was sawed down and drilled with new holes through. If you do buy a chocolate block/european style terminal strip make sure you get the "jumbo" size one because the smaller one I bought won't fit 2 wires in the hole.
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Re: Isaac Mendel build September 26, 2010 04:40PM |
The new connector holds the wires in there very nicely. I don't think this one will be pulling apart.
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Re: Isaac Mendel build September 26, 2010 05:22PM |
...after a false start I now have the jumper soldered onto the correct board with shrink tubes on the ends and I'm getting ready to test this all out....
Edited 2 time(s). Last edit at 09/26/2010 05:55PM by jkelso.
Edited 2 time(s). Last edit at 09/26/2010 05:55PM by jkelso.
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Re: Isaac Mendel build September 27, 2010 01:03AM |
I didn't want to rush into anything so I decided to put off wiring and testing the unit so that I could lay around and watch TV. Finally, I got it all hooked up and....yes, it worked!
Well, the axis all work and the extruder moves now, but I think I may want to play with the extruder software some more because I'm not getting any heat output. I've decided to order a regular old 100K thermistor tomorrow instead of fiddling around with this complicated AD595 thermocouple board. Maybe I can get it to work, but I'm not sure if I'm doing it right by only connecting the one signal wire from the board to one of the TEMP pins, leaving the other pin empty.
Well, the axis all work and the extruder moves now, but I think I may want to play with the extruder software some more because I'm not getting any heat output. I've decided to order a regular old 100K thermistor tomorrow instead of fiddling around with this complicated AD595 thermocouple board. Maybe I can get it to work, but I'm not sure if I'm doing it right by only connecting the one signal wire from the board to one of the TEMP pins, leaving the other pin empty.
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Re: Isaac Mendel build September 27, 2010 11:14AM |
So higher temps only readable with a thermocouple board are necessary for "high quality" ?
I just ordered these thermistors...
Edited 1 time(s). Last edit at 09/27/2010 11:15AM by jkelso.
I just ordered these thermistors...
Edited 1 time(s). Last edit at 09/27/2010 11:15AM by jkelso.
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Re: Isaac Mendel build September 27, 2010 11:40AM |
DanielG I'm trying to compile that extruder.pde file you provided for upload on another thread. I think you said you had this code and you are running an AD595 thermocouple board so I tried it. Maybe I'm wrong on that, but I think that's what I read. Anyway, when I compile your code I get this error message:
I know we've talked about this before but I don't remember ever figuring this one out.
I know we've talked about this before but I don't remember ever figuring this one out.
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Re: Isaac Mendel build September 27, 2010 12:04PM |
I forgot to mention that when I search AD595 on the wiki I get this result, however it's a dead link...
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Re: Isaac Mendel build September 27, 2010 12:12PM |
I found this bit of info at the bottom. I'm not sure I completely understand all of it, but at the bottom it says something about there being a misprint on the circuit board about what wires go where. I guess I'll play around with switching the wires around but I'm still not sure I have the correct firmware installed for this yet. Unbelievable.
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Re: Isaac Mendel build September 27, 2010 01:11PM |
I switched the wires around, putting the signal to ground and the ground to the temp pin but it seems now the red LED doesn't flash on or off which indicates to me that it was correct the way I had it originally. I'm going to reverse this experiment and double check my software and re-upload it to the board. I tried ramping the heat up for a long time but the temp value never changed and the nozzle never got hot. I'm definitely thinking of ordering another extruder board from Makerbot soon if I can't get anything working soon after the thermistors arrive. Would be nice to finally determine if it's the thermocouple giving me the problem or the extruder board. Shipment is supposed to arrive by thursday.
Edited 1 time(s). Last edit at 09/27/2010 01:17PM by jkelso.
Edited 1 time(s). Last edit at 09/27/2010 01:17PM by jkelso.
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Re: Isaac Mendel build September 27, 2010 06:23PM |
I am following the advice from the wiki on testing the thermocouple using a program uploaded to the arduino. I tried all the different possible combinations of pins, taking into account a possible misprint on the circuit board. The best reading I could get from this board is a reading of around 250 degrees Fahrenheit. There is no heat going to the nozzle so this should be reading at room temperature. I do not have a thermistor attached to the nozzle, only the K type thermocouple wire twisted together and cemented around the nozzle. I'm thinking that this wire needs that thermistor next to the nozzle in order to read the lower temps...
Edited 2 time(s). Last edit at 09/27/2010 06:42PM by jkelso.
Edited 2 time(s). Last edit at 09/27/2010 06:42PM by jkelso.
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Re: Isaac Mendel build September 27, 2010 11:01PM |
Also I inserted this code into my motherboard firmware yesterday..
Seems like I should be getting some reading in the software at least, even if it's inaccurate?
I found a MAX6675 thermocouple board here:
[www.adafruit.com]
I think I'll give it a try, at least there's code written for it on the wiki, I don't see code written for the AD595
Also, lambert andrus sent an email back stating that he's been at the faire and that the extruder board is on the way. I should be getting some answers when these parts start arriving in the next few days..
Seems like I should be getting some reading in the software at least, even if it's inaccurate?
I found a MAX6675 thermocouple board here:
[www.adafruit.com]
I think I'll give it a try, at least there's code written for it on the wiki, I don't see code written for the AD595
Also, lambert andrus sent an email back stating that he's been at the faire and that the extruder board is on the way. I should be getting some answers when these parts start arriving in the next few days..
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Re: Isaac Mendel build September 28, 2010 12:29AM |
There that was easy... See where it says servos and analog inputs? connect it to A6 make sure SIG,5V and GND are correct.
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