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Now that I have it set to the right port is there anyway to check the communications between the Computer and the Arduino?
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pingiscoolest
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RepRap Host
ok I did that. It worked the arduino port was /dev/ttyusb0. Thanks for the help!!!
by
pingiscoolest
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RepRap Host
I have installed the reprap host on my Ubuntu 9.04 (i am beta testing it) PC. I am not sure what port my arduino communicates on and am wondering how I would go about finding that out what port I should set the reprap host to communicate with the arduino on. Thanks for any answers!
by
pingiscoolest
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RepRap Host
hey great, nothing else to install. Maybe thats why a search turned up nothing, most people were smart enough to figure that out
by
pingiscoolest
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RepRap Host
I have started using Blender and love it. I would like to use this software to design objects to print on my in progress RepStrap. (BTW, it is much farther along than the picture shows, the picture is from last December) Anyway I was wondering how I can export a blender file as a .stl so it can be opened with the reprap host and printed. I dont know whether this would be in the form of a converte
by
pingiscoolest
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RepRap Host
nophead Wrote:
-------------------------------------------------------
> The reason MOSFETs are used is because they have
> very high current gain so the few milliamps
> available from a logic chip can drive tens of
> amps.
>
> A bipolar power transistor does not have enough
> gain to go from a few milliamps to a few amps, so
> Darlingtons (which are pairs of BJTs), are t
by
pingiscoolest
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Controllers
nophead Wrote:
-------------------------------------------------------
> If you want them to switch off quickly you have to
> actively drive the gate low. The gate capacitance
> of power MOSFETs is quite high ~1000pF IIRC. A 1K
> pull down would be more reasonable.
OK that worked I did that and it works well now thanks. (Feeling pretty stupid now )
> BTW,
> If you are using a
by
pingiscoolest
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Controllers
Well I upgraded to DVD LiveCD so that works well thanks for your help. I have an old laptop with a cracked screen that will probably become a dedicated RepStap PC, then maybe I can figure something out so I can just load the .aoi file to a flash drive and stick the drive in my laptop. The laptop could then convert the file to a .stl and print it. Maybe I'm dreaming who knows. Again thanks for you
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pingiscoolest
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RepRap Host
Nophead, where did you get that etching equipment? Did you buy all the parts seperatly or were they part of a kit?
Thanks
by
pingiscoolest
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Controllers
Also for some reason HEXFETs were much too slow for my steppers so I switched to NPN switching transistors. They are much cheaper and smaller and mine were faster though I don't know if its supposed to be that way. If anyone know why my HEXFETs are so slow I would really appreciate it. They take almost half a second to turn off much to slow to run a stepper. I dont think thats supposed to happen
by
pingiscoolest
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Controllers
It could be done with a microcontroller though there might be significant lag time between when you send the step signal and when the motor steps, depending on the speed of your chips. And HEXFFETs dont need diodes just a tip.
by
pingiscoolest
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Controllers
OK thanks I dont mind doing it this way I just wanted to make sure I wasn't going to end up with 2 of the same OS on my computer . Is there a "post" (not sure what to call it) on the wiki that talks about the LiveCD? I looked but couldn't find one.
by
pingiscoolest
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RepRap Host
heres the link if your interested.
by
pingiscoolest
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Controllers
I am using the Step Genie currently and loving it . It uses Hexfets so for about $8 a board you can control steppers up to 35A at 25V... Sounds good to me
by
pingiscoolest
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Controllers
I am trying to create a live CD to run the RepRap host software from. I downloaded the ISO and burned it to a disc. I inserted the disc into the drive of my Ubuntu 8.10 system and restarted. While it was booting up I pressed the F11 key to bring up a boot menu. I selected CD/DVD drive and it started to run. When it came up, it looked exactly like a Ubuntu Installation disc... Is this supposed to
by
pingiscoolest
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RepRap Host
If money is a big factor spend some time shopping for used steppers. I picked up the steppers in my repstrap used from the CNC Zone For Sale forum for only $10 and I got an extra stepper. They were unipolar though so I had to create a new stepper motor driver to get it to work, not a big deal though. The unipolar steppers also get less torque so I can't run them very fast. Anyway shop around!
by
pingiscoolest
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Controllers
Im not exactly sure what you meant on the first question if you meant..
Will changing the resistor or diode values increase the amperage, the answer is no.
Will I have to change any resistor or diode values to use 2 l298s in parallel, I'm not sure. I'm not an expert but
is a schematic from the datasheet of either the l297 or l298 not sure which, i dont remember seeing that in the l297 datashee
by
pingiscoolest
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Controllers
OK renaming them while they were in there folders didn't work but when I took them out of thier folder and put them in the GCode_Interpreter folder it worked. Who knows why, maybe something weird with Ubuntu. I had tried before but didn't rename the files. I dunno but it works now! THANKS IAN
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pingiscoolest
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Controllers
No I didn't do that I'll try that now.
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pingiscoolest
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Controllers
No I did that. I copied the files so they are also in the GCode_Interpreter file, should I have cut and pasted them so they were only in the pins.h, extruder.h and parameters.h files?
by
pingiscoolest
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Controllers
hhhhhhhhhhhhhhhmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm maybe I should have posted this in the software section.........dunno too late now
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pingiscoolest
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Controllers
I have heard of people using 2 L298s in parallel that would give you more amperage, or theres the more powerful l293e driver chip to give you the amperage you need. Or if your willing to go with unipolar you could get the stepgenie they only cost 5 bucks each and you use them with hexfets so you can easily get over 30 amps. Thats actually what will drive my repstrap after I get the software loade
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pingiscoolest
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Controllers
Heres a screenshot of the Arduino IDE if that helps anyone.
by
pingiscoolest
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Controllers
I have mostly built a RepStrap system and am now working on the software part. I wish to program the Arduino to talk GCode. I downloaded all the necessary files according to the tutorial and put them in the required folders. I am using Arduino IDE 0010 as the tutorial said was required. when I open the file GCode_Interpreter only five tabs show up instead of the 8 that should appear, and I get an
by
pingiscoolest
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Controllers
I have always used lead free solder. I have a xantronix super power iron that has a digital temperature control that I bought for $100. I set my iron to around 620F it works great until I need to desolder. I find that a desoldering wick works better than a pump for lead free solder... not sure why
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pingiscoolest
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Controllers
I just read your entry sorry. I will reply there don't want to have two conversations going at once.
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pingiscoolest
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Controllers
Does anyone know where to find a schematic for the Tommelise 2 controller board? Also does anyone know where to find the latest revision of the T2 firmware or the latest pc side software? I have searched around and found nothing. I also posted this on the Tommelise forum but there seems to be more users here . Any information on either would be appreciated Thanks.
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pingiscoolest
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Controllers
I guess having something like a pick and place tool and a soldering iron ttachment would make it possible for the reprap to replicate its own circuits but would be complicated to replicate
by
pingiscoolest
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General
thanks, I was kind of hoping it was less than that so I could have a whole fleet of repraps
by
pingiscoolest
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General
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Pages: 123