Re: [CAD_CAM_EDM_DRO] Tramming the Head

In a message dated 4/9/01 1:47:42 PM Mountain Daylight Time,
george@... writes:

<< Well I geuss there no way around tramming the head >>

One-way of telling how the tram of the head is to take a slow, fine cut on a
workpiece, and look at the cutter marks, If the all go one way, then the head
for sure needs to be trammed, by looking at the direction of the cuts, you
can tell if it is the leading or trailing edge that is doing the cutting,
either will leave a concave surface. If the cutting pattern shows both the
leading and the trailing edge cutting patterns overlapping you are quite
close. Try both the X and the Y axis for this test.
You can get shim stock at NAPA, and other large automotive parts houses, as
well as machinists supply houses.
Assuming the cutter is moving clockwise on the workpiece.
Cutter marks will look like this:
Direction of travel------> ))))))))))) the leading edge is cutting and the
head should be trammed so that it moves up. This could be described as the
toe cutting.

Direction of travel-------> (((((((((((( the trailing edge is cutting and
the head should be moved to lift this edge. This could be described as the
heel cutting.
The results of either of the above will be concave on the workpiece
.
Direction of travel----------->()()()()()()()() (overlapping), causing a semi
diamond pattern the head is quite close to what you desire.
Test in both the X and the Y axis movement, don't try to tram both at once,
do one, then the other, make a test cut and retram as required to make you
happy.
bill