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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: What type of threaded rod and nuts? (Quality, finish) - 16 years ago
On the wiki today (for Mendel), is mentioned that Zinc Plated is fine, though i'll still go for stainless steel for lead screwsby Grogyan - Mechanics
Re: What type of threaded rod and nuts? (Quality, finish) - 16 years ago
When you tap, using cutting compound, turn the die 1 turn to cut then reverse a half turn, and repeat, this makes it easier to cut long threadsby Grogyan - Mechanics
Re: 5D and Gen2/Gen3 - 16 years ago
I don't think so, it doesn't appear that adding another bit of hardware would cause it to overflow, as its just pin definitions.by Grogyan - RepRap Host
Re: 5D firmware and PWM modifications? - 16 years ago
Well if you are using a regular Arduino you won't be able to, though you can use an Arduino Mega, you just have to code in the pin setups yourself by the looks of itby Grogyan - RepRap Host
Re: Sanguino RS232 - 16 years ago
Be very careful with RS232, as it has a tendency to blow things up, I don't know how high the Rx/Tx signals are but it may be worth checking up on. I'm using the autoreset feature as programming by pushing a button often failsby Grogyan - Controllers
Videos of Mendel - 16 years ago
In the recent changes section of the wiki, Ed has produced a few good videos explaining Mendel I thought i'd just share what I foundby Grogyan - General
Re: G3 Extruder controller V2.2 DC/Thermocouple firmware - 16 years ago
I think I have found it, just got to verify that it is 5D compatibleby Grogyan - RepRap Host
Re: 5D firmware and PWM modifications? - 16 years ago
Just had a thought Buzz wouldn't this be what you and I are after?by Grogyan - RepRap Host
Re: 5D firmware and PWM modifications? - 16 years ago
I've been reading and still am reading up through both the 3G Sanguino and 5D GCode versions of the extruder, and just trying to figure out how to drive a DC motor with the 5D firmware, as it appears to be coded just for stepper motors only. I'm using 3rd Gen electronics with the external extruder board, and I have little knowledge on how to strip out the stepper extruder to replace it with DC dby Grogyan - RepRap Host
Re: 5D and Gen2/Gen3 - 16 years ago
I've been reading and still am reading up through both the 3G Sanguino and 5D GCode versions of the extruder, and just trying to figure out how to drive a DC motor with the 5D firmware, as it appears to be coded just for stepper motors only.by Grogyan - RepRap Host
G3 Extruder controller V2.2 DC/Thermocouple firmware - 16 years ago
Similar question to a similar discussion. I'm am having a hard time finding what to mod in the V2.2 extruder board to enable me to use a DC extruder. What is the firmware mod for driving DC motors on this board? The other question is where do I specify in the old Sanguino-Arduino or Arduino-Arduino code to use the AD595 thermocouple? Thanks Grogyanby Grogyan - RepRap Host
Re: 3d model of Darwin? - 16 years ago
I posted something in this discussion Its an eDrawings file so you can maneuver around the model easilyby Grogyan - General
Re: Loose mechanical bits n bobs - 16 years ago
Just had a thought, seeing as I will need to break that $50 threshold, i'm wondering what would be a cost effective metal to use as garden stakes, you heard me correctly, garden stakes. I'm thinking that angled aluminium would be the best.by Grogyan - New Zealand RepRap User Group
Re: Loose mechanical bits n bobs - 16 years ago
I decided to go up to MicoMetals, to get something, and found out that they have a minimum order of $50 for metal, which would have been ok if they hadn't said that they have separated out their fasteners to somewhere down the road (couldn't find it), to make it more confusing I also asked them if I could at least have just the one invoice for both the metal and the fasteners and pick them up froby Grogyan - New Zealand RepRap User Group
Re: Question about compiled code on SVN - 16 years ago
Assuming the use of Adrian's latest code as of today, I found where to change the temperature sensor type. Its in the 5G Interpreter section, ThermistorTable.h, its set as default the AD595, though the code isn't clear about that, perhaps it should be declared in configuration.h?by Grogyan - RepRap Host
Question about compiled code on SVN - 16 years ago
I've been reading some code in the last week, trying to get it to compile and download to my Sanguino mobo and Extruder 2.2. There was not much in the way of problems, just one, compiler kept on complaining it couldn't find certain header files, and I found out why, for example it complained that it couldn't find pins.h, reason is it got renamed to pins.h.dist. Is there any reason why files haveby Grogyan - RepRap Host
Re: Extruder Bits - 16 years ago
I dunno about that statement grael, i've got no experience on that. Well I think I can give an update of where I am at. Bank statement came today, and the result is that I am unlikely to be able to buy any extruder bits this month, or anything else for that matter. But one thing that I have read up on is it seems that PEEK with a max operating temperature of ~300 degrees C is far more robust thby Grogyan - New Zealand RepRap User Group
Re: Using thermocouples instead of thermistors - 16 years ago
I've got the Thermocouple kit 1.0, which will get attached to the V2.2 extruder board, I have yet to work out exactly what needs to be modified on that board. I've got that mod to do plus being able to support a DC motor instead of a stepper (default code). I looked at the code a day or so ago and the function to "getTemperature" was blank, so I dunno what code to put in there for the thermocoupby Grogyan - Controllers
Re: Skate Bearings? - 16 years ago
I happened to find this, after wondering what sizes of bearings are used on Mendel. Mendel I think uses, 608, 625 and 624, at least that is what I can gather from the file names in SVNby Grogyan - Mechanics
Re: Using thermocouples instead of thermistors - 16 years ago
Just wondering how this compares to the MakerBot thermocouple kit, in terms what needs to me modded on the V2.2 of the extruder board? Thanksby Grogyan - Controllers
Re: free ranging buildbots - 16 years ago
What you're proposing reminds me of this site I found years ago So thinking of a robot arm of 3 DOF, then as work progresses it needs 5 DOF for a short while then returns to a nominal 3 DOF While I think that anyone deciding on tackling rearranging robots for building stuff should be left for someone planning on doing a PhD in Engineering and Robotics, its really quite complicated stuff. Thouby Grogyan - General
Re: New RepRap to slowly be built from Objet parts. - 16 years ago
Sounds very cool. As a request, could you get some video of the Objet printing a RepRap part, please?by Grogyan - Reprappers
Re: RepRap for carving? - 16 years ago
A cartesian robot is not suited for carving, for that you are likely to need a 5 axis CNC or a robot arm The robot arm is a good proposition but it would need to sit on a turntable or the the work to be on a turntable to access areas to carveby Grogyan - CNC Routers, Mills, and Hybrid RepRapping
Ponoko templates - 16 years ago
I got my bits from Ponoko the other day, and have been trying to figure out why all my parts were scaled up by an unknown value. At first I thought I modelled my bits wrong, then I though it might be a problem with Skeinforge. Now after several hours I think that the Ponoko template is somehow scaling stuff up. I created a simple 10mm cube and copy pasted a layer into another document, and printby Grogyan - Plastic Extruder Working Group
Re: Anyone thinking about bioprinting with reprap yet? - 16 years ago
They're already probing ways to program stem cells to create replacement tissue. I think that the guy doing bio printing will use stem cells which would be programmed to be any organ (other than the brain), or any bone. And becuase the stem cells come from the same person needing a new "part", there is no chance of rejection or rejection drugsby Grogyan - Tissue Engineering
Re: undocumented bed template change - 16 years ago
I'm at work at the moment, so I can't open that right now, but I believe I know what your referring to. That notch is part of the nozzle wipe sequenceby Grogyan - General
Re: Skeinforge Powwow - 16 years ago
I've got a wee question. I got my Ponoko parts today, finally, and began to looking at the tolerances of everything, what I found was every part was over sized, and am not sure by what amount, but it is significant. I believe i've tracked the problem down to, sorry, Skeinforge. Would anyone know where to adjust Skeinforge, so that Carve, carves at a ratio of 1:1? Thanksby Grogyan - Skeinforge
Re: Z axis - ARRRRRR - 16 years ago
Using 406 loctite is not a good idea, as it won't stick for long, to the motor shaft, even roughing the surface of the spindle. What could work is filing down the end of the grub screw so that it has a wide flat surface instead of a point. This will work alongside filing down a flat on the spindle of the stepper motor. I am unsure what would be the best adhesive for this, but I can advise againby Grogyan - Mechanics
Re: Larger Reprap? - 16 years ago
Thanks, but I was merely suggesting problems and options with a fairly small scale RepRap setup becoming larger. Assuming a larger than normal Darwin, would need more strength on the rods or removing some of the strain from stuff you can buy readily, box extrusion. Unless of course the guy wants to build a large greater then 2m x 2m cubed bot, then yes other methods will need to be foundby Grogyan - General
Re: Larger Reprap? - 16 years ago
I'm sorry if I seem a bit silly, but I can't visualize how that won't stop the sag, especially when the carriage is in the middle of either the x or y axes. You could in theory go up to 1m for the x and y axes before the sag becomes problematic. You could though use Adrian's extruder where the pinch drive mechanizim is exterior of the carriage, and therefore is less of a problem I've got rightby Grogyan - General