Cam Design Programs
SMOOTH4 - SMOOTH5
Smooth4 screen shots
Screen displays from SMOOTH4 showing velocity and
acceleration curves before smoothing. Actual smoothing of
lift data is done so as to minimize the changes to the
original lift curve. Typical 4 or 5 place data can be
smoothed and extended to 8 places without changing any
point more than .0001/.0002". Often the magnitude of
the changes will be even less. Output options include
hardcopy summaries of all motion data and finished Landis
.P files (to disc) for a Landis 3L CNC cam grinder. The
jerk curve can be toggled on/off for easier display
viewing.
SMOOTH5 graphic display is similar to this but
calculated cam data is for an oscillating arm follower
system as measured with a translating follower.
Smooth5 screen shots
A display of SMOOTH4 shows the velocity and
acceleration curves after smoothing. This program works
with either flat or roller translating follower systems.
SMOOTH5 operates in a similar manner but uses geometry
input data for an oscillating arm follower system.
Comparing numerical derivatives from these programs with
analytical derivatives shows close correlation (1 part in
8 decimal places). This is the easy way to smooth cam
data, an otherwise extremely tedious task. All these
programs need is one open side and one close side file in
one degree increments starting at maximum lift and ending
at zero lift.
Calculation and screen redraw time is approximately 2
seconds. Either program can also import old blueprint
data and Landis .P files for smoothing.
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