Sshire
Well-Known Member
- Joined
- Jun 29, 2011
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OK. Now I'm officially confused. Help me out, please!
After centering a cylinder bore with the Blake Co-Ax indicator, I set up a bolt hole circle on the DRO.
My usual procedure is to use a spotting drill and just tap it on the part to make a dimple (just as a visual check) at each bolt hole. *The "circle" looked off center.
I put the DTI in a collet and the bore was NOT centered. So, I indicated it with the DTI until it was dead nuts on.
Just for my sanity, I tried recentering 4 ways. My procedure was to use the DTI centering as a baseline (ABS 0,0), and then recentered with
A. Blake Co-Ax
B. Starrett center finder
C. Haimer ZeroMaster
So here are the results
* * * * * * * * * * * * * * * * * * * * *X. * * * * * * *Y
Interapid DTI. * * * * * * * .000 * * * * * .000
Blake. * * * * * * * * * * * * *.0006 * * * * .0152
Starrett. * * * * * * * * * * * *.000 * * * * *.0116
Haimer. * * * * * * * * * * * * .000 * * * * .0098
Help!!! I'm off somewhere between 10 and 15 thou. My assumption is that the DTI is a correct center. *I did compare the DRO with the dials and both agree perfectly, so that would ( I think) remove any DRO issues from the equation.*
After centering a cylinder bore with the Blake Co-Ax indicator, I set up a bolt hole circle on the DRO.
My usual procedure is to use a spotting drill and just tap it on the part to make a dimple (just as a visual check) at each bolt hole. *The "circle" looked off center.
I put the DTI in a collet and the bore was NOT centered. So, I indicated it with the DTI until it was dead nuts on.
Just for my sanity, I tried recentering 4 ways. My procedure was to use the DTI centering as a baseline (ABS 0,0), and then recentered with
A. Blake Co-Ax
B. Starrett center finder
C. Haimer ZeroMaster
So here are the results
* * * * * * * * * * * * * * * * * * * * *X. * * * * * * *Y
Interapid DTI. * * * * * * * .000 * * * * * .000
Blake. * * * * * * * * * * * * *.0006 * * * * .0152
Starrett. * * * * * * * * * * * *.000 * * * * *.0116
Haimer. * * * * * * * * * * * * .000 * * * * .0098
Help!!! I'm off somewhere between 10 and 15 thou. My assumption is that the DTI is a correct center. *I did compare the DRO with the dials and both agree perfectly, so that would ( I think) remove any DRO issues from the equation.*