Really underground garage
Join Date: Aug 2010
Location: mnts of Va
General rambling that can be used/abused in any way you see fit.
Same idea or principal...it can be applied to any adjuster that has a round knob where your hand turns it.
You can use whatever thread pitch you got.Obviously the finer the pitch the more fine the movement....duh.But each application has to be,atleast thought about.A std mic has 40 TPI....uhhh, a bit too fine for a pce of equip,yes/no.
Anyway,the "trick" isn't so much about the TPI...it's about the business end of adjuster.The larger you can make the "handwheel"...the more accurate the "practical" usefulness of the tool becomes.So that should rank in importance up there with you TPI choice.Make the knob/handwheel as large as possible.....using this as a guide in your design phase.
Next is rather simple.and we can look at a TS blade adj handwheel for the example.Wrap the outside of the handwheel/knob with masking tape.You'll need some kind of machine mounted "pointer".This is what....points.
Now you need some kind of measuring device.....lets keep it simple and use a dial indicator.They ain't the most accurate of indicators but will suffice in practical terms quite nicely here.
Just use the D.I. to measure the advance on blade,fence,whatever....marking the tape wrapped handwheel.
The advantage to tape is....you can mark it for specific setups....where if we took the time to inscribe nice neat little fancy lines(which should take about as long to do as write about)....it just makes it a chore when doing repeat setups.....the masking tape is faster.You're only marking what you need.
Repeatability is governed by other factors on the equip.But throw a nice handwheel diameter and a decent TPI...and simply check it for yourself.It can get more involved in the design phase if you start to think in right angles on adjusters.Cosine error can be eliminated.....it sounds WAY more complicated than it really is.Just pay attention to the angle of attack on the adjuster and how you want the part to move.Stick to right angles.
Those who say it cannot be done shouldn't interrupt the people doing it.