Slight bow in HDM frame

My hdm sat on a bowed surface for a year as I was mostly machining wood so super high precision wasn’t needed. But now that I’m going in to aluminum I decided to move it to a completely flat epoxy top surface. Now the problem is that the horizontal bars of the frame seems to have taken on a slight bow and I can slide a 0.011 in feeler gauge pretty easily under the 3 out of 4 of the horizontal frame pieces.

Is this something that will straighten out after some time with some weights piled on top or is there something that I need to do to fix it? The surface that the machine sits on is completely flat as I did an epoxy pour over the whole thing.

How much weight have you had on your bed? I would take a leap and say it was probably slightly bowed to begin with. Depending what your doing and if your running fixture plates its not really a problem. The bow would effectively be remove if you face your mdf or shim/face your fixture plate.

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It’s bowed upwards, by weight I meant if I put some weights on top it’ll get rid of the bow temporarily. Im going to be machining full aluminum fixture plates so that was what I was thinking of doing but I wanted to try and flatten it out a bit more before I make the fixture plates on the same machine. The stock comes pre surfaced so only need x/y accuracy, which it shouldn’t affect too much right?

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