I’ve been using the OF for a few months now but I’m now seeing that when I call for a certain size, I’m always off by a fraction. I designed a small tray in F360, 95x65mm outside with 3mm wall thickness, machined today with expensive tooling, multiple toolpaths, no stock to leave etc etc and I’m ove…

Most people need to calibrate their machine to be accurate. The Onefinity is very precise, but isn’t often perfectly accurate out of the box. Search the forum for adjusting the motor motion settings.

I often find that when milling Aluminum you really have to go slow, or the bit deflects slightly and tolerances suffer. It is not really a machine issue vs a bit issue… with that said while the OF can clearly carve and cut aluminum it is not going to compete with $50K+ metal CNC’s when doing harder …

I tested my machine for accuracy and I had to adjust a fraction of a mm in my travel per revolution setting. Stock was 10mm and I think my one axis I had to adjust it to like 10.09 or something like that. There is a thread in here and one of the members wrote up an excellent method for testing each …

In addition to the above, also check out the dimensions of your bit. Just because it says it’s a qtr inch doesn’t mean it is. Also, if you set the X/Y you may touch inside a flute vs on the solid part of the bit and be fractionally off.

[image] Testing and tuning OF for accuracy Machines (Original/PRO) I promised I would write the procedure I used to test and adjust the accuracy of the OF, so here it is. Decided to add it to this thread rather than create a new one. Things you will need: OF Woodworker…

Hey Andrew, may I ask, are you milling this with the makita trim router?

Hi all, to clear up a few points. Yes, I’m using the Makita router and finishing contour passes with a very light cut. My tooling was very expensive and is definitely the size it states:) I have a Faro arm in my lab and did some checking on the calibration today. Over 800mm I’m around 0.15mm under…

Don’t forget about the runout on your Makita, not a precision tool. When I went from Makita to spindle I noticed a large improvement in accuracy, quality of cut, surface finish etc. I will never run a trim router again.

I checked the runout on the router and it was around 0.01mm. 0.2mm is a large enough amount of runout that I would be expecting a poor surface finish on the walls and floors and I’m not seeing that… :thinking:

Only other thing I can think of is checking your programming then. Did you have stock to leave selected? If you derived you contour operation from your adaptive operation and forgot about this it could have been selected mistakenly. You mentioned expensive tooling but have you actually measured it? …

Final part dimensions out of tolerance

Original/PRO Series (Buildbotics) (Gen 1)

AdamsLeatherWorks (Eric Adams) September 20, 2021, 7:58pm 6

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Final part dimensions out of tolerance

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