6 Jan
2014
6 Jan
'14
10:53 p.m.
On 01/06/2014 01:40 PM, Fred Cisin wrote:
A quetion for Tony, Chuck, Allison, etc. :
We need to deal with 48tpi (5.25 and 8"),
96tpi (5.25")
135tpi (3.5"),
and a few bizarre ones, such as 100tpi, etc.
Looking at the 48tpi example:
48 tpi is approximately 1/2mm track to track spacing.
The actual width of the track is approximately 1/4 mm.
What offsets from spec would be needed to be able to reasonably check for
alignment?
Well, I try for 1 mil (.025 mm) on alignment. If I can get there, I'm
pretty safe, even at 135 tpi.
I do have specs for the Dysan 8" DAA (48 tpi) that calls out offsets, if
that's interesting.
--Chuck