Blog for the RepRap project at www.reprap.org - a project to create an open-source self-copying 3D printer. To get all the early posts on this blog with all the images as a single PDF visit this page.
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Monday, May 19, 2008
Progress with ABS
I have developed peelable rafts and a reusable bed for ABS: -
That has enabled me to make these Darwin parts before my extruder broke again: -
gene, No I think that kind of defeats the purpose. I strongly believe that anybody only needs to print three sets and soon everybody that wants one can have a set and do the same. I had a ginger beer plant when I was a young kid and soon learnt about 2^n replication.
Molding is fast but quite labour intensive. RepRap is slow but you can leave it going all day and come home to find a neat line of objects. My machine is smaller than Darwin but I can still make 3 corner blocks or 7 diagonal tie brackets at a time with big enough gaps between for the head to get in so they can be made one at a time in case of power cuts or break downs.
Reading some of your blog, it occurs to me that you might want to make yourself a DSC. They're quite simple in principle, and the only drawback to building a crude one is needing a larger sample to get comparable resolution.
It would help you in identifying polymers, and give you more data on specific heat, critical temperatures, etc.
In the case of inorganic fillers, you'd most likely see a linear signal from the filler (chalk and titania and glass all lack phase transitions at such low temperatures), plus a nonlinear signal from the polymer.
For varieties of polystyrene (ABS, high-impact, hot glue...), you'd see a signal from the brittle PS phase, and a separate nonlinear signal from any rubber filler.
It should be fairly straightforward to fit these mixed curves with a program like LabPlot, to get a notion of relative quantities.
Just to clarify: When I say a separate signal, I mean a signal that can be separated mathematically, not one that will enter your computer by a different channel.
Wow, that looks really high quality? Have you consider making one of each individual part so you can do molding of the rest?
ReplyDeleteUtterly beautiful!
ReplyDeleteShe's looking bloody good, mate.
ReplyDeleteVik :v)
Incredible quality, Chris. Congratulations! :-)
ReplyDeletegene,
ReplyDeleteNo I think that kind of defeats the purpose. I strongly believe that anybody only needs to print three sets and soon everybody that wants one can have a set and do the same. I had a ginger beer plant when I was a young kid and soon learnt about 2^n replication.
Molding is fast but quite labour intensive. RepRap is slow but you can leave it going all day and come home to find a neat line of objects. My machine is smaller than Darwin but I can still make 3 corner blocks or 7 diagonal tie brackets at a time with big enough gaps between for the head to get in so they can be made one at a time in case of power cuts or break downs.
Amazing stuff! I can't wait for reprap to reach 2^n (even with N as months... it'sw very exciting!)
ReplyDelete-Leav
Nophead:
ReplyDeleteReading some of your blog, it occurs to me that you might want to make yourself a DSC. They're quite simple in principle, and the only drawback to building a crude one is needing a larger sample to get comparable resolution.
It would help you in identifying polymers, and give you more data on specific heat, critical temperatures, etc.
Joel,
ReplyDeleteWould that work identifying a polymer even if it had a filler material?
Oh, yes.
ReplyDeleteIn the case of inorganic fillers, you'd most likely see a linear signal from the filler (chalk and titania and glass all lack phase transitions at such low temperatures), plus a nonlinear signal from the polymer.
For varieties of polystyrene (ABS, high-impact, hot glue...), you'd see a signal from the brittle PS phase, and a separate nonlinear signal from any rubber filler.
It should be fairly straightforward to fit these mixed curves with a program like LabPlot, to get a notion of relative quantities.
Just to clarify: When I say a separate signal, I mean a signal that can be separated mathematically, not one that will enter your computer by a different channel.
ReplyDelete