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  1. I talked to shopbot and they think a loose e stop...

    I talked to shopbot and they think a loose e stop wire or to check the drivers see if a red light is flashing when it happens. it has been working normally today. but it got a bit off on one of the...
  2. errors in cutting on my prt alpha not sure what caused it.

    the machine was made the last year shopbot made the alphas. it has run fine the whole time. had some issues with the serial to usb adapter and a new one fixed it. I have went through two or three...
  3. about how many hours did you have on this setup?

    about how many hours did you have on this setup?
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    yes but what did you glue it down with? not much...

    yes but what did you glue it down with? not much sticks.
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    How do you stick the pdf down to such materials?

    How do you stick the pdf down to such materials?
  6. our much better off making a black box vac system...

    our much better off making a black box vac system its far cheaper. if you want something pre made I would go for a larger hole house vac. the bigger oens are two 220v vac motors and are fairly quiet....
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    that's typical of a Cnc machine. if the bit is...

    that's typical of a Cnc machine. if the bit is long enough to cut in a single pass then use climb cuts and the last pass a full depth regular direction cut. thats the best way to get accuracy and...
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    ya I figured that.

    ya I figured that.
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    I got a email earlier about the upgrade but just...

    I got a email earlier about the upgrade but just now I got an email saying I am eligible for a free upgrade but the site does not show it is free. I did the last upgrade on 7/19/07 I think.
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    debating on it. smart folders may be what I am...

    debating on it. smart folders may be what I am after if I don't have to jump through folders every time I save a file or a tool path.
  11. thats a prt alpha.

    thats a prt alpha.
  12. 6 to 8 ips the z is the limit I think 6ips is the...

    6 to 8 ips the z is the limit I think 6ips is the max. not sure of the rpms but its not critical on foam so keep it low to keep the heat down. the larger the stepover you can manage will save a...
  13. the limit is your machine. the z axis of course...

    the limit is your machine. the z axis of course is the biggest limit. your bullnose can cut 2.5" in a pass so if you can just remove enough on the roughing pass so it does not have any foam deeper...
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    got one customer with 1" thick letters and they...

    got one customer with 1" thick letters and they want to deal with the edges.
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    best way to seal sintra edges?

    I never do any painting of sintra but some of my customers struggle with sealing the edges to get a nice finish. any ideas?
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    well unless it is a 4x8 sheet. a compromise is to...

    well unless it is a 4x8 sheet. a compromise is to spray one side of the material or table with strong contact glue and then vacuum it down. that works well but it is a bit messy and it can get...
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    been using it for years. you still need some way...

    been using it for years. you still need some way to hold the sheet in place. I use it keep thin plastic from lifting up when I cut it. but there are other methods depending on what your cutting....
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    he machine will jam up before that. t

    he machine will jam up before that.
    t
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    even at that I don't think I am pushing things. I...

    even at that I don't think I am pushing things. I think the shopbot will run out of power before the spindle does.
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    with the 4hp hsd I can take 1/8" off on wood...

    with the 4hp hsd I can take 1/8" off on wood surfacing with a 2.5" bit at 6ips
  21. I leaned that the hard way (G) I had a lot of...

    I leaned that the hard way (G) I had a lot of 3/4" hdpe left over. you can sand it with a really course paper to give it tooth.
  22. the problem I see is without the texture...

    the problem I see is without the texture commercial cutting boards have your food slides off.
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    good to know. I know it was hard to fork out for...

    good to know. I know it was hard to fork out for a new spindle a couple years ago.
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    these will be lighted. but they are going to use...

    these will be lighted. but they are going to use a gray stain on the wood so it wont contrast well. I was worried about wood movement too. so I used cedar and planed it down to 1/8" as thats the...
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    ok finally customer got his stuff together. he ...

    ok finally customer got his stuff together. he is a new sign guy so he needs hand holding. I decided to go with wood as he is not skilled at painting I used west systems g flex epoxy to glue 1/8"...
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