It was finally time for me to work on fine-tuning the tramming on my OF, and I tried using the published guide for adjusting front-to-back adjustment by tightening/loosening the adjustment bolts on the X axis rails - I bungled the job apparently. At the moment, I still have useable but poor front-t…

That almost sounds like either your rails have a bit of twist or your table does. My table had a twist that would bite me depending where the weight of the axis was positioned… When I was fully forward or back everything layed flat but when the y was centered there was a done3formed in my table top.…

If I completely loosen all eight bolts and then by eye/revolution count run each opposing set of two the same amount inward until all are gently snug, does that get me to a good place from which to try again?

Front to back tramming: if I understand you correctly I achieved this by shimming with varying folds of tin foil behind the zslider.

Hey Andy, hey John @jnordyke , hey BJ, hey SkyKam, hey all, [image] AndyP: Front to back tramming: if I understand you correctly I achieved this by shimming with varying folds of tin foil behind the zslider. I think John rather means the Guide Tramming - Front To Back in the FAQ category, is …

To answer Aiph5u’s questions - Remember, I have had “satisfactory for a beginner” precision for quite some time, I am now trying to do more granular adjustments… Yes, I was following the Tramming Front To Back from FAQ. I used both observation of the surfacing bit patterns and a simple homemade “…

Hey John, [image] jnordyke: a different amount tilt when at Y=0 inches than when at Y=32 inches this remains to be found out why. How much is it? And how shows it up? When measuring towards the front? The swinging arm of 15 inch length, doesn’t it overhang the surface towards back at the e…

Hey Aiph5u, First a goof from not good proofreading when I posted - the differences in nod are at the extremes of the x axis, not the y…so sorry! And, those differences (which I detect visually from surfacing) are not unusual - they are mentioned in the posted procedure that one must check at both…

Hey John, [image] jnordyke: I used the top of my very large cabinet saw as reference plane when constructing my torsion box, so I am confident in that. I agree, a saw table usually is a good reference :slight_smile: [image] jnordyke: will re-execute the adjustment after bringing bolts b…

Thanks. I don’t know why I hadn’t thought of winding sticks before - I am very old, and an experienced woodworker who has used winding sticks in traditional manner for decades. When I was a young man, we were using rocks tied to sticks with rawhide as hammers :smile:

Seeking Advice For Restoring Front To Back Tilt

Uncategorized

SkyKam January 21, 2022, 6:23am 5

I needed a .03" shim before fine tuning with the tramming bolts. The tramming bolts will not correct the tilt if the error is too large to begin with.

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Seeking Advice For Restoring Front To Back Tilt

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