Anthony douglas log - Revision history

Anthony at 04:53, 8 September 2019

2019-09-08T04:53:43Z

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	1)I did not install linux because my tiny computer cannot handle two operating systems or a virtual machine. I would need to buy a new computer to do that. I can do that when the time comes, however it is not practical right now and this is better than nothing. I can still do all the required tasks just as easily in windows, freecad in particular runs find in windows.		1)I did not install linux because my tiny computer cannot handle two operating systems or a virtual machine. I would need to buy a new computer to do that. I can do that when the time comes, however it is not practical right now and this is better than nothing. I can still do all the required tasks just as easily in windows, freecad in particular runs find in windows.

	2) I am learning freecad anyway, and have surpassed the minimum requirements laid out in freecad 101. I have spent maybe 10 hours of actual productive time on it. I already know a lot of CAD, so that helps a lot. I have used onshape, fusion 360, and solidworks already. Solidworks I used professionally.		2) I am learning freecad anyway, and have surpassed the minimum requirements laid out in freecad 101. I have spent maybe 10 hours of actual productive time on it. I already know a lot of CAD, so that helps a lot. I have used onshape, fusion 360, and solidworks already. Solidworks I used professionally.

	3) documenting the work did take some time, to learn to use kdenlive. It took maybe 1.5 hours to figure everything out. The audio especially.		3) documenting the work did take some time, to learn to use kdenlive. It took maybe 1.5 hours to figure everything out. The audio especially.
			video:
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			Subtract some points for not installing linux I guess, however I did above average with using freecad, so I give myself 80 percent total.

			I have made also a video in which I use the body placement parameters editing approach with multiple bodies in the part design workbench instead of the a2 work bench, and could edit and upload that as well, however that is not good practice for creating a CAD document though. It is better to use constraints, so things are exact, will update automatically in the event of changes, and there are no errors, and it also took half the time to make the assembly. Plus you can get motion and other benefits from the assembly. When I have a look at some of the other test videos, there are some serious problems with the way people are making stuff there, with the parts not fitting together exactly, etc. When you go to manufacture something, the parts have to fit together. I noticed that is happening a lot with people using freecad, they do not know that you need to use references etc. and work precisely when doing cad, because this is not included in the tutorials anywhere. I could stand to learn a lot more cad and then make a decent manual, but that will have to be in the more distant future. There are other people who would be much better suited to doing so, but they are not doing it.
	=June 29=		=June 29=

Anthony at 04:45, 8 September 2019

2019-09-08T04:45:43Z

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	<html><iframe width="560" height="315" src="https://~~youtu~~.be/66htrKRWbEM" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe></html>		<html><iframe width="560" height="315" src="https://www.youtube.com/embed/66htrKRWbEM" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></html>
	1)I did not install linux because my tiny computer cannot handle two operating systems or a virtual machine. I would need to buy a new computer to do that. I can do that when the time comes, however it is not practical right now and this is better than nothing. I can still do all the required tasks just as easily in windows, freecad in particular runs find in windows.		1)I did not install linux because my tiny computer cannot handle two operating systems or a virtual machine. I would need to buy a new computer to do that. I can do that when the time comes, however it is not practical right now and this is better than nothing. I can still do all the required tasks just as easily in windows, freecad in particular runs find in windows.

Anthony at 04:43, 8 September 2019

2019-09-08T04:43:00Z

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 =June 29=

Anthony at 15:14, 29 June 2019

2019-06-29T15:14:08Z

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 =May 25 2019=
 I was glad to be able to do some analysis of proposed router structures with the use of fusion 360.  A powerful piece of software, but not at all open source, plus you don't even have control over your own data, and it is impossible to pirate.   We really need to have more practical and powerful open source software in this domain.  For now, we can still design open source things using the equivalent of closed source compilers, but it is asking for trouble.  Software engineers generally use closed source hardware, I would note.  There needs to be more cross talk in these domains.

Anthony at 18:51, 25 May 2019

2019-05-25T18:51:03Z

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 =March 10 =
 d printer statement

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2016-12-03T14:04:16Z

Added {{RightTOC}} + fixed header typos

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	=March 10 =		=March 10 =
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	=~~april~~ 8=		=April 8=
	We are very much expecting to finish the pulverizer build tomorrow. There is some trouble with the shaft, and the tooth bars just need to be bolted on, and that's it. The bucket also serves as a front end loader. Then we need to integrate the output of the build process into the product development, as enabling others to efficiently produce another unit is central to the enterprise. We have the time lapse as a record of the process, and also the time logs we have been keeping. I really wish, and I said this at the beginning, that we had a camera or several, documenting the whole process. The camera misses a lot. Even just now, I went in and asked if there were any shots of the shaft, so I could look at it instead of taking it all off to look at it. No. The shaft has been kicking around for many days of build time, and there is still no clear picture of it anywhere?		We are very much expecting to finish the pulverizer build tomorrow. There is some trouble with the shaft, and the tooth bars just need to be bolted on, and that's it. The bucket also serves as a front end loader. Then we need to integrate the output of the build process into the product development, as enabling others to efficiently produce another unit is central to the enterprise. We have the time lapse as a record of the process, and also the time logs we have been keeping. I really wish, and I said this at the beginning, that we had a camera or several, documenting the whole process. The camera misses a lot. Even just now, I went in and asked if there were any shots of the shaft, so I could look at it instead of taking it all off to look at it. No. The shaft has been kicking around for many days of build time, and there is still no clear picture of it anywhere?

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	=~~april~~ 7=		=April 7=
	Pretty good build day. I replaced the propane tank regulator this day, I think. I have been forgetting about my log to some degree, and will try to fill it in at the end of each day. When we are not actually at our computers the value of filling it in during the day is really too low.		Pretty good build day. I replaced the propane tank regulator this day, I think. I have been forgetting about my log to some degree, and will try to fill it in at the end of each day. When we are not actually at our computers the value of filling it in during the day is really too low.
	=April 6=		=April 6=

Anthony at 15:15, 10 March 2016

2016-03-10T15:15:11Z

Anthony at 15:12, 10 March 2016

2016-03-10T15:12:59Z

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Anthony at 22:41, 9 March 2016

2016-03-09T22:41:34Z

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			=March 9 =
			I just want to post quickly to apologize for missing the last webinar. I have every intention to come to the next one this Friday and have set my phone to remind me.
	=March 5=		=March 5=

Anthony at 23:09, 5 March 2016

2016-03-05T23:09:16Z

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			=March 5=

			I did some research on open source extruders.
			I would post them here but they show up immediately upon googling "open source filament extruder", and I am on my phone here so it would be time consuming.

			They sound reasonably straightforward, but I feel like it is important to express what I am thinking instead of sitting on it: I do not think it is the best use of development time for ose to produce another such design. They sound mature enough and it is a different ball game from the larger machines that OSE is best currently set up for.

			Secondly I think it is important to recognize the secondary degree of utility, in contrast to the primary nature of the actual printer. The value of his very small scale plastic recycling is in truth very low except to reduce print costs, and even then I have read filament is only $5 per kg or so when you shop around and get the generic stuff. It takes a long time for a printer to extrude that much ultimately. Compared with the capital cost and other running costs od the printer it is not that bad.

			The amount of waste material recycled is extremely small relatively. The idea of feeding poorly founded and shallow desires like the enthusiasm of the environmentalist for filament extruders from recycled plastic concerns me a great deal. I have long seen the strength of the OSE concepts as coming largely from the deeply well founded and close to the root issues they do. Recycling of plastic just for filament should be displaced by more critical things just as steel recycling is. More so because large objects which take a lot of plastic make no sense to print, the process being too slow whereas steel can be recycled and used in large amounts more sensibly.
	= March 3 (2)=		= March 3 (2)=

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	1. Inkjet powder bed molds followed by vacuum polyurethane or aluminum casting. The guerillacnc site has a very good quality (honestly this is the sort of stuff we need) site on polyurethane casting. Combined with the unlimited general geometries (no support sructures etc needed), high tolerances, relatively good surface finishes, high strength and temperature resistance, looks right at hand.		1. Inkjet powder bed molds followed by vacuum polyurethane or aluminum casting. The guerillacnc site has a very good quality (honestly this is the sort of stuff we need) site on polyurethane casting. Combined with the unlimited general geometries (no support sructures etc needed), high tolerances, relatively good surface finishes, high strength and temperature resistance, looks right at hand.

	Both processes are low cost and known to work fine. Just put them together. There is an open source powder bed printer but it only gets 96 dpi right now. Maybe the cartridge can do more but the developers haven't gotten around to adding that. Also simply hacking a normal inkjet makes a lot more sense than making your own like that in many ways. The peizo actuator inkjets are relatively uncommon but what you really want so you can use a range of binder fluids, iirc there was only one inkjet printer I could find that used peizo. The others use small heater elements to vaporize the fluid and produce pressure so if there is nonvolatile stuff in the fluid I don't know if that would work well. Maybe. For gypsum or salt pure water might be fine anyway and useable with most injkets.		Both processes are low cost and known to work fine. Just put them together. There is an open source powder bed printer but it only gets 96 dpi right now. Maybe the cartridge can do more but the developers haven't gotten around to adding that. Also simply hacking a normal inkjet makes a lot more sense than making your own like that in many ways. The peizo actuator inkjets are relatively uncommon but what you really want so you can use a range of binder fluids, iirc there was only one inkjet printer I could find that used peizo. The others use small heater elements to vaporize the fluid and produce pressure so if there is nonvolatile stuff in the fluid I don't know if that would work well. Maybe. For gypsum or salt pure water might be fine anyway and useable with most injkets.

	There is one group that used salt as the powder and got good results that I recall seeing years ago. That no one has tried using such printers for casting seems unlikely but who knows, and I cannot find any evidence of it.		There is one group that used salt as the powder and got good results that I recall seeing years ago. That no one has tried using such printers for casting seems unlikely but who knows, and I cannot find any evidence of it.
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	The development effort to prove the concept here would similar to the nickel microdevices stuff but have far more profound implications.		The development effort to prove the concept here would similar to the nickel microdevices stuff but have far more profound implications.

	And granted perhaps the greatest value for nasa would be to develop fundmental stuff like the cvd process itsself which has broad applications, but they don't really do that much either actually. As an aside I have noticed how nasa research on e.g. water recycling and food production etc. is surprisingly applicable, perhaps because they must return to fundamentals much as we seem to in order to make progress, the usual approahes being so so far from what we really want.		And granted perhaps the greatest value for nasa would be to develop fundmental stuff like the cvd process itsself which has broad applications, but they don't really do that much either actually. As an aside I have noticed how nasa research on e.g. water recycling and food production etc. is surprisingly applicable, perhaps because they must return to fundamentals much as we seem to in order to make progress, the usual approahes being so so far from what we really want.


	3. Liquid metal deposition followed by stress relief, ceramic support material and milling.		3. Liquid metal deposition followed by stress relief, ceramic support material and milling.

	There is a group at cornell I think it was that has been doing work on what thet call Shape deosition manufacturing, which is a higher level concept in which material is deposited crudely then milled into shape at each layer.		There is a group at cornell I think it was that has been doing work on what thet call Shape deosition manufacturing, which is a higher level concept in which material is deposited crudely then milled into shape at each layer.

	There are a lot of combinations possible, so after exploring quite a bit I have tried to get some more immediate progress by focussing on considering the particular combination of use of tool steel as build material, stress relief to a moderate degree using electropeening during the build process and or maybe ultrasound, ceramic support and three axis milling with a ceramic cutting tool. This seems to be a peak in the effort vs value diagram. Using steel instead of aluminum is not looking any harder to me because to mill aluminum you need lubricant, but not for steel, for example.		There are a lot of combinations possible, so after exploring quite a bit I have tried to get some more immediate progress by focussing on considering the particular combination of use of tool steel as build material, stress relief to a moderate degree using electropeening during the build process and or maybe ultrasound, ceramic support and three axis milling with a ceramic cutting tool. This seems to be a peak in the effort vs value diagram. Using steel instead of aluminum is not looking any harder to me because to mill aluminum you need lubricant, but not for steel, for example.
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	The other is the post deposition stress relief as mentioned above in the tungsten cvd stuff. There is a contractive stress that forms as a result of the cooling of the metal on each layer just like fdm printing. Unlike plastic though we may be able to rlief the stress to a manageable degree at each layer because metal is malleable. Then at the end of the print process the object being embedded in the support material to prevent motion of long arms or anything we could anneal it all for nearly stress free parts.		The other is the post deposition stress relief as mentioned above in the tungsten cvd stuff. There is a contractive stress that forms as a result of the cooling of the metal on each layer just like fdm printing. Unlike plastic though we may be able to rlief the stress to a manageable degree at each layer because metal is malleable. Then at the end of the print process the object being embedded in the support material to prevent motion of long arms or anything we could anneal it all for nearly stress free parts.

	On an almost personal or perhaps methodological note, I can now say with some reasonable authority that the milling side of this can work fine. However I remember many times thinking before I had gotten into milling that we knew that from the general characteristics and developed nature of milling as a process. In other words I did not need to know a lot about milling, nor would the developer of such a system. This seems to me to be a useful note on the reality that people can probably use tools around us like the process which is milling, in such an innovative manner without spending a ton of time on the details. The fundamentals and core realities do get you a long way probably.		On an almost personal or perhaps methodological note, I can now say with some reasonable authority that the milling side of this can work fine. However I remember many times thinking before I had gotten into milling that we knew that from the general characteristics and developed nature of milling as a process. In other words I did not need to know a lot about milling, nor would the developer of such a system. This seems to me to be a useful note on the reality that people can probably use tools around us like the process which is milling, in such an innovative manner without spending a ton of time on the details. The fundamentals and core realities do get you a long way probably.

	Another point that I often see others will bump into after investing more time then they need to if I could just tell them now:		Another point that I often see others will bump into after investing more time then they need to if I could just tell them now:
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	Productivity rate and per print reliability. I often hear people talking about producing quantities of things that you would probably never make with 3dp. It is only one process among many manufacturing processes and is ultimately not that special except its suitability to anticapitalist activity or making do with small amounts of capital. The amount of time it would take to print numbers of large objects makes the time it takes to build and use injection molding or extrusion etc look like a bargain.		Productivity rate and per print reliability. I often hear people talking about producing quantities of things that you would probably never make with 3dp. It is only one process among many manufacturing processes and is ultimately not that special except its suitability to anticapitalist activity or making do with small amounts of capital. The amount of time it would take to print numbers of large objects makes the time it takes to build and use injection molding or extrusion etc look like a bargain.

	Among the central values it has are the divisibility of capital (that is the amount of capital needed to make anything at all. $1 k vs $15 k for a mill for instance), low retooling cost, reduced input requirements, relatively low geometry limits in most ways, and the first hop from bits to atoms that it can provide.		Among the central values it has are the divisibility of capital (that is the amount of capital needed to make anything at all. $1 k vs $15 k for a mill for instance), low retooling cost, reduced input requirements, relatively low geometry limits in most ways, and the first hop from bits to atoms that it can provide.

	Some random model of maker bot apparently gets 4.5 cc per minute.		Some random model of maker bot apparently gets 4.5 cc per minute.
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	This leads to something else that cuts right to the core of Ose, the maker movement and things like this: when people who are deeply interested in the subject and have spent a lot of time on it etc. focus on three d printers going into a role that makes no sense, it highlights at least two things: we need to understand the existing body of work of manufacturing techniques way better and our current understanding is extremely rudimentary.		This leads to something else that cuts right to the core of Ose, the maker movement and things like this: when people who are deeply interested in the subject and have spent a lot of time on it etc. focus on three d printers going into a role that makes no sense, it highlights at least two things: we need to understand the existing body of work of manufacturing techniques way better and our current understanding is extremely rudimentary.

	Secondly there is a sort of paradox with the idea that on the one hand great projects can be completed well, like the development of a superior 3d printer, while at the same time a hopelessness around implementing things that are very conventional, like injection molding.		Secondly there is a sort of paradox with the idea that on the one hand great projects can be completed well, like the development of a superior 3d printer, while at the same time a hopelessness around implementing things that are very conventional, like injection molding.

	Perhaps a distant third is the reality that we really want and see that even basic versions that are fully done of certain systems, like a printer, would be worth so much more than the literally dozens of partially done ones... and yet we have little in the way of fully done stuff to offer others. Thank goodness for the reprap project, because the sum total of all supposedly open source printers out there would not, I am betting, be worth a damn to someone who wanted to move onto the next step like holding printer build days. They are nowhere near ready from what I have seen.		Perhaps a distant third is the reality that we really want and see that even basic versions that are fully done of certain systems, like a printer, would be worth so much more than the literally dozens of partially done ones... and yet we have little in the way of fully done stuff to offer others. Thank goodness for the reprap project, because the sum total of all supposedly open source printers out there would not, I am betting, be worth a damn to someone who wanted to move onto the next step like holding printer build days. They are nowhere near ready from what I have seen.