We’ll I’ve tried everything. I’ve re set-up the machine twice and put in all new fastening screws. But it still won’t mill a perfectly square corner. I’d say it mills a line out of square by about one millimeter in 16 inches. All of the bolt have been checked and everything is very tight. What’s next?
Hey David,
how did you check for rectangularity? I find using a bar gauge for a first check for identical diagonals is very useful. When you adjust the rails then, it is good to loosen the eight bolts that attach the X axis to the two Y sliders a bit, then do the squaring of the rails with the bar gauge, and then tighten the X axis bolts again.
By the way, when mounting the Onefinity CNC to a table top, I always suggest not to use the wood screws that come with it, but bolts instead, or better bolts in sleeves (e.g. brass) with bolts in it. Their diameter would need to be exactly 8 mm:
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Thank you, it seems that no matter what I did I could not get the diagonals to match. I’ll try it your way once again though. And maybe I’ll change to bolts although my surface is a torsion box that is 3” thick. My machine is the X32 with the X50 x rail.
Hey David,
to get the diagonals to match, you only need to loosen two adjacent feet of the machine (let’s say, the two front feet), and to shift them between right and left (with X axis slid to front, and its bolts loosened additionally)
Further reading
The so-to-speak “official” thread in this forum about rectangularity of the machine is “Is your router frame a parallelogram? Mine was! ”
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BTW, I have the original Onefinity controller.
Thanks for your help. I’ve had the machine for a few years now but somehow it got out of whack. It was very square right out of the box but I store mine in a vertical position with stop blocks on the x rail but one of them got knocked out and I think it torqued something out of square. Now it’s just been a pain to get it back into square. The diagonals are still about 3/16” different measured at the black corner blocks. I’ll try measuring where the tubes are connected.
Hey David,
yes, I can imagine that. It’s always not helpful when gravity is your enemy 
Just to let everyone know, I’ve finally succeeded in getting everything all squared up and BOLTED down securely. I appreciate all of your help. It just took two more hands attached to a friend of mine and now she’s up and running once again!
Thanks everyone!
Capn Dave
Yep. I used M8 bolts. They fit the holes in the 1F foot precisely.
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