 | | Re: NQC 2.0 and some math questions
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On semaphores... There was a lot of discussion a long time ago on whether NQC should use semaphores to protect temp variables between tasks. There isn't an atomic test-and-set bytecode, so the only way I know of implementing sempaphore would be to (...) (25 years ago, 1-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Gosh, that's a tall order. Y'know, you're going to send me back into hiding for quite a while. And I was just thinking of taking a break after coming out with my new creation. Maybe I should just loan you my testing machine.... -- C S Soh (...) (25 years ago, 1-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Ahhh I see now... DHL is the one with the flying trucks arent they ? As soon as I personally watch one of them land on my street, I will gladly send him the assembly( without tanks of course) Its hard to replace them since I dont live in (...) (25 years ago, 1-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Greetings : ) Silly me, made it more complex than it was. Does DHL stand for "Delivers Holy LEGOs" ??... Thanks for the clarification. Anyway here is a link to several pictures of the assembly process. I will try to put together a parts list. (...) (25 years ago, 1-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Well, sort of. As you can imagine, all my pumps and air tanks are already taken up in my models of Mike's and Ralph's and other compressors in order to carry out the comparative tests. Seriously though, if anyone has pneumatic parts they no (...) (25 years ago, 1-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: NQC 2.0 and some math questions
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(...) I think that if you do something like this you should use a semaphore to secure no tasks access y and z simultanously. But that wastes another variable storing the sema. (25 years ago, 30-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Er, DHL is one of the international express courier services. They'll deliver parcels to any place in the world. You could also use Federal Express... No, I don't want the DAT files, I want to lay my hands on that awesome creation of yours (...) (25 years ago, 30-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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DHL is an express service, competitor to Airborne and FedEx. Master Soh is making a play for a donation. :-) (...) (25 years ago, 30-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) heehee more air power is better,right ? <grin> of course it really depends on the application, but in this case I want to push about 8 cylinders. maybe this upgrade to the pump will help get me inspired to complete it. (...) I will put some (...) (25 years ago, 30-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) My, that is an awesome looking compressor design, indeed. I hope it doesn't throw my recording device off-scale. I'm not too sure I can build it just from the pictures but I'll give it a go. It'll help if you could include some exploded views (...) (25 years ago, 30-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: NQC 2.0 and some math questions
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(...) That's exaclty what I was thinking of doing. Originally, the compiler had no way of allocating temp variables which is why code for % couldn't be emitted. The temp allocator is now pretty good, so I could emit the above sequence, but it just (...) (25 years ago, 30-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Er, I didn't actually measure the pressure. I merely recorded the movement of the piston of the cylinder up to its maximum extent. -- C S Soh (URL) where air is power (25 years ago, 30-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Hi, Ralph Your double-acting pump is still a cool design. I like the futuristic look. It was quite easy to build from the pictures. I had to substitute for the tall sloped brick but otherwise I followed the images faithfully. Of course, I'm (...) (25 years ago, 30-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Hmmm .. Two stage might not be the correct term. Two stage would imply it was compressing already compressed air, right ? I am sorry about that. Double acting would probably be more correct as each compressor leads to it's own airtank then (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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Hmm maybe I should clean up my Compressor design and add it to my Lego page I have expanded on the mini-compressor to make it double action - but full stroke. It is about twice as long as the mini pump, and a little wider due to three 24t gears. (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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Why is this two stage? I could not follow this design clearly but are you feeding the output of one stage to the input of the next? Two compressor pistons in parallel is something else (double acting?? I am not sure what)... Cool design no mater (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Hi Chio Thats a pretty interesting design. Nice work! (URL) Here is a link to some pictures of the two stage compressor I built. Hopefully there are enough details shown to reconstruct it but if you have any questions let me know. The actual (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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c s soh <cssoh@singnet.com.sg> wrote in message news:37F21B8E.1C3CD6....com.sg... (...) What kind of maximum pressure (psi) can you get? I built a pressure sensor that I will publish very soon based on the Lucas sensors available from Digikey. I (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | RE: RCX Controlled Air Compressor Tester
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The page on compressor comparisons is really informative. I'm honoured that you felt my design was worthy of testing. The reason I made it a two stroker was to "balance" the load on the driving system. Michael Powell's compressor tends to "lump" (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Thanks, It could possibly be done but I've not tried it. It would have made the air compressor tester more complicated than necessary. As you can see I'm really a minimalist. One of the design goals was to keep it simple yet fully functional. (...) (25 years ago, 29-Sep-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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