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  1. To heat my workshop... Someone is lending me a couple of them. A minimum of 16 deg C as a constant temp is recommended and West System state: "As the temperature drops, epoxy becomes proportionally thicker, reducing its ability to flow out." They also state that air bubbles are more of an issue at lower temperatures.
    Last edited by JoeHarris; 06-05-2016 at 11:44 PM.

  2. #232
    Hi Joe
    If you have a vacuum pump you could knock up a degassing pot, i use an old pressure cooker.
    Regards
    Mike

  3. #233
    Hot air gun across surface would usually deal with any bubbles.

  4. Ready to pour! Click image for larger version. 

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ID:	18429 I made some little brackets to hold the mdf in place Click image for larger version. 

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ID:	18430 sealed both sides with silicone so hopefully no leaks! Click image for larger version. 

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ID:	18431 and heat gun and Vaseline at the ready! Click image for larger version. 

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    Last edited by JoeHarris; 09-05-2016 at 06:49 PM.

  5. #235
    Best of luck, looks like you've got everything prepared though so I'm sure it'll go fine.

  6. #236
    careful with the heat gun joe you can easily cause hot spots which harden at different rate. Only a quick flash is needed and only if really needed. Few air pockets won't hurt anything.

    Not quite sure what the vasoline is for thou.?

  7. #237
    Quote Originally Posted by JAZZCNC View Post
    Not quite sure what the vasoline is for thou.?
    Vaselines for the same as heat gun apparently "Some like it Hot!"

  8. Quote Originally Posted by JAZZCNC View Post
    careful with the heat gun joe you can easily cause hot spots which harden at different rate. Only a quick flash is needed and only if really needed. Few air pockets won't hurt anything.

    Not quite sure what the vasoline is for thou.?
    Cheers Dean, I will take it easy on the heat. The Vaseline was for the mdf sides to act as a release agent... I think Clive suggested it?

  9. This is why you want slow cure epoxy - this a time lapse- the movement is barely perceivable in real time. Click image for larger version. 

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ID:	18448 well it's done. Now we wait... Click image for larger version. 

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    Last edited by JoeHarris; 10-05-2016 at 09:28 PM.

  10. The Following 2 Users Say Thank You to JoeHarris For This Useful Post:


  11. #240
    Great stuff especially the time lapse video. It might be worth keeping the bridge between the 2 rails in place during initial setting up if you need a datum to DTI off to align the gantry Y rails - depending on the gantry rail design you've decided on
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

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