Gallery, Projects and General > How to's
PRECISE OPTICAL LAYOUT FOR CENTER PRICKING
PekkaNF:
Nice work and always informative to read on these howtos.
How does the accuray on these thingys compares with the scriber on groove and feel method? I'm not blind, but I'm having hard time imaginning this being better, specially if magnification is much less than 5X.
Pekka
Joules:
Pekka, it's not so much the magnification (1:1 on mine) as the high contrast it gives you. The Perspex transmits the light down the hole to the work piece. It's much easier to line up the cross hairs and unlike my auto centre pop doesn't bounce off to one side as I didn't have it vertical when I popped it. The error on my line centre is 0.125mm off centre, I know this by twisting the perspex over a steel rule and watching the centre point move around the 0.5mm ruler line. I'm pretty sure I put this error in when I zeroed off the 8mm section and it flexed down under the weight of my height gauge.
Since showing a few people, I have had a few requests for them, especially wood workers as it's GOOD ENOUGH. With practice I can do better on my centre accuracy, can't find my 8mm sliver steel so will have to pick some up soon. :(
PekkaNF:
Good enough is good enough!
Pekka
Joules:
I thought I would make a few more this afternoon.
Ed ke6bnl:
is the plastic just acrylic rod? and what is the outer housing made of.
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