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P2EVAL Rev 3 acrylic enclosure

W9GFOW9GFO Posts: 4,005
edited 2020-07-18 - 06:22:56 in Propeller 2
P2 Eval Rev C enclosures now ready to order. Slight redesign to account for the DIP switch being in a slightly different location and cutouts changed so that there is no interference with accessory boards.

www.etsy.com/P2 Eval Rev C
www.etsy.com/P2 Eval Rev C (Top piece only)

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Comments

  • JRoarkJRoark Posts: 619
    These are really sharp! I love mine and will definitely need another.

    Request: Ilthis is a small thing, but the radius on the inside corners of the connector cutbacks interferes with the accessory boards. Any chance of changing this radius? If you need a picture I can post one for you.
  • W9GFOW9GFO Posts: 4,005
    JRoark wrote: »
    ...the radius on the inside corners of the connector cutbacks interferes with the accessory boards. Any chance of changing this radius?

    A known issue. It is my understanding that a few swipes of a nail file will take off the corner of the accessory board so that it can fit without interference.

    The alternative is to alter the design making the cutouts deeper and/or sharper. The radius is already as small as I can make it while still being able to chamfer the edges - making it a sharper corner would mean that the continuous chamfer around the top piece would not be possible. Deepening the cutouts would require the "neck" to be even narrower - that would be a problem at the lower left where it is already quite narrow due to the reset button.

    I would like to see a picture though, it would be useful to compare it against the CAD model to see what the real clearances are.
  • JRoarkJRoark Posts: 619
    Not the best picture, but maybe you can get a better idea. If you’d like, I can loan you a board for sizing. But as you say, that nail file trick works nicely.
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  • PublisonPublison Posts: 11,828
    edited 2020-07-05 - 15:19:23
    I'm with Rich. The nail file treatment only takes a minute. Much easier than Rich trying to tweak the corner. I did 8 boards in less than ten minutes, plus if you had applied this to the lastest case, they are already done!
  • W9GFOW9GFO Posts: 4,005
    edited 2020-07-05 - 21:25:50
    Here is what the clearance looks like in CAD, it is pretty close to what your picture shows. I think I will remain stubborn on this one. Perhaps in future runs Parallax could chamfer those corners? If not, a nail file can resolve the issue quite easily.

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  • PublisonPublison Posts: 11,828
    Yea, file on the board faster than triangle file on the plastic.
  • JRoarkJRoark Posts: 619
    Works for me. Have nail file and had been using it as needed. (I had to search for a board that wasnt filed yet for that picture). But I figured you might want to know before you did a new run.

    That enclosure fits together so snugly its amazing. I wasnt sure you could actually get those kind of tolerances with hobby-level CNC. When I got mine I tried to test-assemble it with the protective paper on. Nope! Just amazing...

  • W9GFOW9GFO Posts: 4,005
    JRoark wrote: »
    That enclosure fits together so snugly its amazing. I wasnt sure you could actually get those kind of tolerances with hobby-level CNC. When I got mine I tried to test-assemble it with the protective paper on. Nope! Just amazing...
    Thanks, it is difficult to find the ideal size to make the holes because there are always variances in the thickness of sheets of acrylic*, more so in different colors even though they are all nominally the same. I had to slightly enlarge the holes when I found that a certain color of side piece was thicker than all the rest and was causing some problems with assembly.

    I am not sure that my machine qualifies as "hobby level". It is bigger and more powerful than either of the machines that I saw at Parallax. Having said that, even the cheapest eBay laser can produce the same quality of parts as long as the operator is competent. It won't be as fast and won't last as long, but for a hobbyist it would work fine.

    *I always use cast acrylic, extruded acrylic is more consistent in thickness but is much more brittle. Cast is much more durable and it engraves nicely. Extruded acrylic is what you will find at a home improvement store, you have to get cast acrylic from a supplier.
  • PublisonPublison Posts: 11,828
    Still going to do Etsy?
  • W9GFOW9GFO Posts: 4,005
    Publison wrote: »
    Still going to do Etsy?
    That is the plan.

  • pilot0315pilot0315 Posts: 662
    When can I order?
  • W9GFOW9GFO Posts: 4,005
    pilot0315 wrote: »
    When can I order?

    Hopefully by the end of this week, I am waiting on parts...

  • pilot0315pilot0315 Posts: 662
    Great please let me know.
    Thanks
  • W9GFOW9GFO Posts: 4,005
    edited 2020-07-11 - 06:40:46
    Okay, due to popular demand and a little arm twisting by someone that shall not be named, I have reversed my stubbornness and made some changes to allow the accessory boards to fit (I think) with no modifications.

    I should be able to post a link to where they may be ordered by tomorrow evening.

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  • whickerwhicker Posts: 660
    Animated gifs on forums obviously became banned when jump scares and bright flashing were being abused.
  • idbruceidbruce Posts: 6,168
    Rich

    It is difficult to see what your fix is from the photos. I know it would mess up your beautiful chamfer, but couldn't you just cut a corner into the chamfer? I don't think it would look too bad. Just my opinion :)
  • JRoarkJRoark Posts: 619
    edited 2020-07-11 - 23:23:11
    Would that someone “who shall not be named” sorta look a bit like me when I pass a mirror? (Tall, dark, handsome, svelte, sort of a cross between Tom Sellack and... well... ok... Marty Feldman, with emphasis on Marty)

    Asking for a friend. :)

    EDIT: Take my money, please!
  • W9GFOW9GFO Posts: 4,005
    JRoark wrote: »
    Would that someone “who shall not be named” sorta look a bit like me when I pass a mirror? (Tall, dark, handsome, svelte, sort of a cross between Tom Sellack and... well... ok... Marty Feldman, with emphasis on Marty)

    Asking for a friend. :)

    EDIT: Take my money, please!

    No, it definitely was not you, but the description is at least partially accurate.
  • W9GFOW9GFO Posts: 4,005
    idbruce wrote: »
    Rich

    It is difficult to see what your fix is from the photos. I know it would mess up your beautiful chamfer, but couldn't you just cut a corner into the chamfer? I don't think it would look too bad. Just my opinion :)


    It is difficult to see the differences, that's why I wanted to post an animated gif. The chamfer remains. You can carefully compare the two images and see that the corners of the accessory boards now have clearance.
  • idbruceidbruce Posts: 6,168
    Sorry Rich

    Being unfamiliar with the board and your nice acrylic work, I was looking at the wrong location.

    I see the fix now . :)
  • W9GFOW9GFO Posts: 4,005
    I have updated the original post with links to where they can be ordered.
  • dgatelydgately Posts: 1,369
    Wow... How fast did this happen?

    Thank you, W9GFO!
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  • pilot0315pilot0315 Posts: 662
    My enclosure arrived a couple of days ago. Thanks
  • JRoarkJRoark Posts: 619
    That is some darned-Skippy good work there, Rich. I just ordered my second one.
  • JRoarkJRoark Posts: 619
    And.... mine arrived yesterday! The fit and finish is really excellent, as is the documentation.
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  • David BetzDavid Betz Posts: 14,364
    I have an odd request. Is it still possible to order the Rev A case? I moved my Rev A case to my Rev B board and so now the Rev A board is without a case. Can I get a Rev A case along with my Rev C case?
  • JonnyMacJonnyMac Posts: 7,306
    edited 2020-07-28 - 19:19:00
    [deleted]
  • W9GFOW9GFO Posts: 4,005
    edited 2020-07-29 - 00:47:58
    David Betz wrote: »
    I have an odd request. Is it still possible to order the Rev A case? I moved my Rev A case to my Rev B board and so now the Rev A board is without a case. Can I get a Rev A case along with my Rev C case?

    Hi David, the Rev B and the Rev A have significantly different top pieces, I wouldn't think that the Rev A case would work well with the Rev B board. If you just need a new top piece you could order a Rev C top piece (link in first post) and leave a note that you need it to be for the Rev A (or Rev B.) Eval board.
  • David BetzDavid Betz Posts: 14,364
    W9GFO wrote: »
    David Betz wrote: »
    I have an odd request. Is it still possible to order the Rev A case? I moved my Rev A case to my Rev B board and so now the Rev A board is without a case. Can I get a Rev A case along with my Rev C case?

    Hi David, the Rev B and the Rev A have significantly different top pieces, I wouldn't think that the Rev A case would work well with the Rev B board. If you just need a new top piece you could order a Rev C top piece (link in first post) and leave a note that you need it to be for the Rev A (or Rev B.) Eval board.
    What I would need is two cases, one with a Rev A top piece and the other with a Rev C top piece. When I got my Rev B board I bought a new top plate from you to convert my Rev A case to a Rev B case. Unfortunately, I broke the old Rev A top plate when I removed it so I can't use it again.

  • W9GFOW9GFO Posts: 4,005
    David Betz wrote: »
    [
    What I would need is two cases, one with a Rev A top piece and the other with a Rev C top piece. When I got my Rev B board I bought a new top plate from you to convert my Rev A case to a Rev B case. Unfortunately, I broke the old Rev A top plate when I removed it so I can't use it again.
    No problem, I already have a Rev A top piece cut.
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