Swelling issues, Table

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey Sterling,

@DailyLunatic

Question: What are the screws/bolts that hold the 1F to the table like? Do they just screw into the wood of the table, or are they, or can they, be bolts/nuts.

with the Onefinity machine, for attaching the feet, you just get wood screws (packing list) but I would not use such screws. I would use bolts matching the corresponding diameter in the feet, possibly with a matching sleeve. This drawing from Bill @Machinist will help you:

@Aiph5u

Unfortunately I did not find the time to make these measurements yet, but Bill @Machinist makes very nice plans, on this one, there wasn’t much that was missing and that he would have measured the holes of the rails. Perhaps he has a plan of the whole foot cross section?

Here’s a document I created for my Machinist, and you just add 16" for the Woodworker. These dimensions worked perfectly for my base. MACHINIST FOOTPRINT.pdf (51.7 KB)

Thank Bill @Machinist for this

(excerpt from a file from Bill that I downloaded once a while ago))

This is from Onefinity:

@OnefinityCNC

@DailyLunatic

Someone offsite suggested that I could bolt it to the table rather than screwing, and then using large washers, or backing board, to eliminate the chance of the screws pulling out of the MDF when hung. If bolts are possible, I may be able to use the HMR with a Torsion Box and support the 1F from the inside of the box. Metal plates for instance.

Sure. Good idea. That’s how I plan to do it. But I would not use MDF to build a table. It is too soft, too flexible, and of heavy weight at same time. Plywood is much stiffier. Also MDF is much more prone to swelling as plywood. As for highly moisture resistant (HMR) MDF, I have no experience, never saw a use case. I use MDF only for speaker cabinets, where you want no acoustic resonance. Or for a wasteboard, but I think I will try the HDPE wasteboard as discussed the other day. HDPE is 100% recyclable, simply by melting it. MDF is (by far) not.