your extruder idea looks interesting and i just noticed this thread today so my question may be out of date. are you still using the 2mm trimmer line that you posted about early in the thread? the reason I as is most trimmer line is nylon and tends to be hygroscopic so it absorbs a significant amount of water from the air and typicaly requires drying before usage, or at least this is the best inby RBisping - Plastic Extruder Working Group
Ok first raldrich sorry if i either misunderstood or misinterpreted your comment and yes i really do want input. MPG format really is just a initial idea/concept opener so its not something that I'm emotionally attached to. I only say that its how i intend to do a initial implementation, if it doesn't work well then ill retry using something like a slide show with the slices as b/w bitmap or someby RBisping - Polymer Working Group
This type of encoding would not work for a reprap mendel/darwin style printer, it would only be sutable for a uv curing full layer transfer method. You wouldnt be sending vectors or line segments for printing, all of the slice and preformating would be done before encoding as a mpg and then the slice video is played with essentialy any mpg/dvd device. The reason I was saying it could be potentialby RBisping - Polymer Working Group
I recently posted in my blog about a idea im working on right now. Its to use a lcd screen as a build mask for uv or near uv curing resin. my blog is without repeating it all here part of the idea is also taking the slice images and turning them into a mpg video file with the audio track imbeding z-axis timing pulses for varying thicknesses. something like 1000hz tone with a 1 pulse per frameby RBisping - Polymer Working Group
I dont think you realized just how old this thread is, most of this is all completly outdated.by RBisping - Developers
the key to getting reprap development expanded is getting more repraps in service and developing. There are a lot of developers working on various issues you mentioned, MrKim's oled circuits, unfold's ceramic extrusion, etc, I personaly am working on both the ceramic extrusion and organic printing of circuitry. Im also working on expanding on jeri ellisworths home microchip manufacturing such thaby RBisping - Developers
sorry my last post was incomplete, i didnt mean aluminum nitrate specificly but a nitrogenation of your aluminum in general. all aluminum welding is done with either argon or helium. I tried to find any references to why nitrogen isnt ever used as a aluminum sheild gas but found none. The closest reference was that nitrogen in carbon steel welding will cause porosity, but all sources I could locaby RBisping - Plastic Extruder Working Group
not certain but i believe you will get a aluminum nitrate if you try to heat in nitrogen. aluminum is rather reactive with most things so inert gasses are a must.by RBisping - Plastic Extruder Working Group
ok, ill check that out. i got a couple more mega's the other day and tried dl again and got the same results, i was able to reinstall the origional images though.by RBisping - Firmware - experimental, borrowed, and future
vik, yes ive been following that blog for a bit and love the info they have been putting out. now i just need to do it myself. John, thanx for that info, and the answer to your question is both yes and no. with 1 deg overhang you may get a full shadow of the object but not full enclosure, though i havent tried that for a few iterations of skeinforge so not sure right now.by RBisping - Skeinforge
i also believe it is a issue with my programmer but so far havent found a answer, also havent had time lately to work on it more either. Thanxs for the help and future helpby RBisping - Firmware - experimental, borrowed, and future
I have been working on a dual head system for a while but one of my hold ups has been skeining a object and being able to control both extruders with skeinforge. Im curious if there is a way currently to get skeinforge to do this or if the process just hasnt been developed yet since not many are working on this? Also as a support material option I was desiring a full support option. i.e. take thby RBisping - Skeinforge
well, i did try redoin the fuses as per your email and still no boot. i get a deviation in the writing and reading of the hex file at 0x10000 and the eep file at 0x02 i will have to retry it again and see if i can cut and paste it into a window. but im in the middle of moving so it might be a few days. oh im using the programer from makerbot a usbtiny.by RBisping - Firmware - experimental, borrowed, and future
thanx for the hex files mate. I now get all the way to version on reset but no prompt so seems something is still missing. not sure what though. when i do a upload i still get the error message when it compares the written to the origional. though not sure what keeps getting lost or if its just that it keeps comparing past the written part. Is there a order that the hex files should be installby RBisping - Firmware - experimental, borrowed, and future
ok, i think i found where i need to put the eepby RBisping - Firmware - experimental, borrowed, and future
haha, thanx for the info. and most of that i know pretty well but its the specific of loading it on the mega that is being a issue. ive already changed the fuse settings to yours (though ff turns into f7 for efuse) but it should still be fine there. when i do the upload and then verify it says first mismatched byte 0x10000 0xff!=0x0c ive been using hyperterminal in windows so far and it just sby RBisping - Firmware - experimental, borrowed, and future
hmm, ok never mind the first question. apparently it didnt install the hex properly. so, am i going to have to compile this myself or is the hex file in the directory supposed to be completeby RBisping - Firmware - experimental, borrowed, and future
well, i picked up a second mega and have (i believe) installed the forth kernel into it. but I havent been able to find any real documentation on how to talk to it. Im not sure if i just have my speed, parity etc wrong or if the programs im trying to use to access it are inappropriate. Any info would help though i will keep working on it regardlessby RBisping - Firmware - experimental, borrowed, and future
something i was thinking about with the mega. I intend to install a sd card on mine or at least the forth one once i get it purchased. Having a forth routine that can be called that then takes a gcode file input and stores it on the sd card in forth formated gcode that can then be printed directly off the sd card would be rather optimal and not too dificult to impliment either. Must think more.by RBisping - Firmware - experimental, borrowed, and future
i dont think so. but doing it this way would require something like a powder printer set up because of the inability to print on open air/ any kind of overhang at all.by RBisping - Polymer Working Group
I started with all makerbot stuff on my mendel and have since had to replace almost everything due to low torque on the motors and not being able to run the stepper extruder system using it. but it is a good rout to start.by RBisping - General Mendel Topics
while i cant speak for everyone my intention for uv curable resins is wet tank and uv laser spot curing. though i have intentions to do high volume paste dispensor tests also. posibly using abs/pla as supporting medium to reduce slump at higher speeds.by RBisping - Polymer Working Group
I was talking to someone at work the other day who was talking about laquer painting and during the conversation It became apparent that it may be a uv curing resin, not sure if anyone already has looked into this or if that is just another name for some of the resins you have already been talking about. I plan on doing some tests of it as a potential print agent but wouldnt mind knowing if someoby RBisping - Polymer Working Group
the problem with a support that disolves with acetone is that most everything disolves with acetone. a low cost water soluable thermoplast is what we need and so far those tend to not be low cost. but we do keep looking. though water soluable wouldnt be necessary as long as the solving agent only disolves the support. are there any alcohol disolving thermoplasts?by RBisping - General
I currently have a double headed extruder on my mendel. im not using both yet but having them at the same height hasnt been a issue yet. the oozing issue may become one once i have both heated simultaneously but... that will be for another day. Its posible that issue could be solved by cooling/stoping heat to the unused head though then you have to deal with heat up and cool down times. Im thinkiby RBisping - General Mendel Topics
ok, trying again. Years ago I wrote a forth interpreter/compiler for the appleII computer and have had to deal with forth variants in plc programing environments (i.e.parasol) so have some familiarity with it. I see no reason that a end user would be able to tell the difference from a forth based controler and the current one. feed it g-code and out comes a print. on the other hand, from a testby RBisping - Firmware - experimental, borrowed, and future
Doh, my entire last post got et.by RBisping - Firmware - experimental, borrowed, and future
yea, i tried every search i could think of on it and it just doesnt seem to be there.by RBisping - Administration, Announcements, Policy
I remember a thread about using forth on the reprap but for some reason i cant seem to find anything on it any more. Can someone point me in the right direction?by RBisping - Administration, Announcements, Policy
well, looking at the m codes i see that 113 would be irrelevant to me. it shouldnt change anything so would be ignored. which is what appears to be happening. Ive been reading through buzz's source and see that there were issues with the order that certain pins were initialized in, I changed the pin outs to something that was easyer for me to work with and that may be my issue, x step 50, x dirby RBisping - Controllers