Wasteboard Woes - nope i think i am splitting hairs

Good afternoon All,

Quick sanity check i am going mad today, was doing a 30min write up for pro edge tram technique (double gauge) and have hit a snag.

So after the surface is complete it is like a mirror, no tram lines at all in either direction X or Y (ran surface toolpath twice in each direction) no ridges or “bumbs by sight touch or dia”

The issue i have is there is a difference of roughly .100 of an in or .0254mm and i just cant figure out why, machine is tight in terms of tolerance squaring etc, i though that it could by my Y rails slightly at different heights but they are the same too? but no dice there either.

No i admit this leads into something that i was talking about into my tramming procedure, and that is sometimes the machine is doing it’s best and it will only every be able to attain the “good enough” state and chasing hundred of an inch here .25mm there, is never going to resolve it self, and nore should it otherwise we would not need to buy a Kern 1mill plus machine

But it feels a little strange that i have the height difference ans if it was flex i would have anticipated the flex at time of running to be resolved, i even took off another 1mm from the surface same result.

So the C3D bat sign has gone up - help me brothers and sisters your views and insight are needed here, going to go up to the machine to get exact difference then will update.

As always thanks in advance for taking the time to read and respond.

Jon

** UPDATE ** ok so forget this i am literally splitting hairs here, need to learn to read a dial properly i think lol - “a single strand of hair with a diameter of 0.04 to 0.06 mm is considered to be thin, and i have a difference front to back (Y) of 0.06mm and side to side (X) of 0.07 so i am going to say yeah that will work lol” such a noob sometimes think that is ok - i could start flat wars but don’t do it kids this chasing 0.xxx mm’s is not good for you

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Do you mean a difference of 0.025 in Z height of the trammed surface? In which dimension? Measured against what as a reference?

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hi @LiamN - so edited my post as above, but what i was saying is after surfacing inserting a dial into the router to read the surface finish from the Z i was seeing 0.06mm difference from X/Y two points, but honestly there is nothing to see here, i just didn’t read the dial right i though it was telling me i had a 6mm difference :slight_smile: - in my defence it is a new dial… lol that is my excuse and i am sticking to it.

In short currently X/Y over a distance of 32"/31.5" has a 0.06mm variance !

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:wink:

I’m guessing you’ve got one of Luke’s HDZs there then …

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original blue baby :slight_smile:

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What sort of toolpath was used for this?

What material are you surfacing?

Hi @WillAdams acing toolpath in fusion 360, material MDF (moisture resistant) version 1"flat bit Doc .25mm Stepover 39.8% Fr 3218

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