Wintriss SmartPAC2, User Manual

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1126700 SmartPAC 2 User Manual
4-14 Initialization Mode
The Auto Advance Menu allows you to adjust your Auto Advance and Slow RPM settings
while the press is running. When the press is stroking, the press speed in SPM is displayed in
the upper right corner of the screen under the caption PRESS SPEED. When an Auto
Advance cam is turned on, the press angle is displayed in the same location under the caption
PRESS ANGLE. The PRESS ANGLE display enables you to see the effect of different
Advance Constant and Slow RPM settings.
Calculating the Auto Advance Constant
To calculate the auto advance constant for a specified cam channel, follow these steps:
1.
Determine the fastest speed (RPMa) of your press and the angle at which the cam should
turn on at this speed (Aa).
2.
Determine the slowest speed (RPMb) of your press and the angle at which the cam should
turn on at this speed (Ab).
3.
Subtract the two angle values. We will call this result “Ac.”
Aa – Ab = Ac
4.
Subtract the two press speeds. We will call this result “RPMc.”
RPMa – RPMb = RPMc
5.
Divide
Ac
(the difference between the angles) by
RPMc
(the difference between the press
speeds), and multiply that value by 100. That is the number of degrees per 100 RPM.
Ac / RPMc x 100 = #
°
/ 100 RPM
Example: Calculating the Auto Advance Constant for a Pilot Release Cam
Your slowest speed is 50 RPM and the pilot release angle at that speed is 100
°
.
Your fastest speed is 100 RPM and the pilot release angle at that speed is 75
°
.
Subtract 50 RPM from 100 RPM: 100 – 50 = 50
Subtract 75
°
from 100
°
: 100 – 75 = 25
Divide the difference in angles by the difference in RPM, and multiply this by 100:
25 / 50 x 100 = 50
Your advance constant is 50
°
/ 100 RPM
.
Setting Auto Advance Constants and Slow RPM
To set the auto advance constants and slow RPM value, do the following:
1.
Select AUTO ADVANCE on the Main Initialization Menu to access the Auto Advance
Menu (see Figure 4-10).
If either stopping angle occurs after 0
°
(or 360
°
), then add 360
°
to the angle. For instance,
if the press stops at 12
°
, the stopping angle is actually 12
°
+360
°
or 372
°
.
NOTICE