SmartPAC 2 with WPC 2000 Integration User Manual
1128600
Initialization Mode
4-13
Auto Advance is a ProCamPAC feature that allows you to provide accurate timing for
speed-sensitive functions on variable speed presses, such as feed advance, pilot release,
advance slide, part lube, and conveyors. Auto Advance works best on presses with speed
ranges from several hundred to over a thousand Strokes-per-Minute (SPM).
A channel programmed as Auto Advance automatically advances cam timing as the speed of
the press increases and delays the timing as speed decreases. The rate of advance or delay is
controlled by an advance constant, a specified number of degrees of advance for each 100
SPM increase in press speed.
You can set two advance constants on the Auto Advance Menu. Advance Constant 1 is
applied to the lowest numbered cam channel programmed as Auto Advance. Advance
Constant 2 is applied to the next lowest numbered Auto Advance channel.
You must also specify the minimum press speed at which auto advance will be applied. This
value is entered in the SLOW RPM field on the Auto Advance Menu.
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 (see Figure 4-9). 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).
LIMIT ON CAM CHANNEL AUTO OUTPUT SETTINGS
You cannot program more than two cam channels as Auto Advance. See
IMPORTANT TO SET SLOW RPM
SmartPAC 2 uses the Slow RPM value as a starting point in the auto advance process. If the
value you enter for Slow RPM is inaccurate, SmartPAC 2 will not auto advance programmed cam
channels at the right time.
NOTICE
NOTICE
Содержание SmartPAC 2
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