1126700
SmartPAC 2 User Manual
6-20
Run Mode
Stopping time is the time that it takes the crankshaft to stop once the dual safety valve (DSV)
has been de-energized. Starting time is the time it takes for the crankshaft to start turning after
the DSV has been energized. Instructions for setting start time and stop time limits and
documentation of SmartPAC 2’s responses to start time and stop time faults are provided in
SET BRAKE MONITOR, page 4-8.
Stopping angle is the number of degrees that it takes the press to stop. It is equal to the ram’s
stopping position in degrees minus the crankshaft position when the DSV is de-energized.
(Stopping angle does not compensate for the complete rotation of the press when it takes more
than 360
°
to stop.) The stopping angle value helps you when you set up the top-stop cam. For
example, if the stopping angle is 100
°
, you would set the top-stop cam to turn on at 260
°
.
Determining the Stopping Time of Your Press
You need to determine the stopping time of your press at Top Stop in order to calculate the
stop time limit to set in Initialization. To do so, perform the following steps:
1.
Install the heaviest upper die you use on your press. Adjust the counterbalance for ram
weight, if your press has a counterbalance.
2.
Turn the Program/Run key to RUN to access Run mode, then select BRAKE MONITOR
on the Main Run Menu. The Stop Time Status screen displays.
3.
Start the press in Continuous mode, and run the press until it reaches normal operating
speed.
4.
Top-stop the press and record the value (in milliseconds) displayed in the STOP TIME
VALUE (MSEC) field.
5.
Repeat steps 3 and 4 five more times. Use the highest stop-time reading from your runs as
the value to use in calculating the stop time limit (see Calculating the Stop Time Limit,
page 4-9).
Performing the 90
°
Stop-time Test
The 90
°
stop-time test is required by OSHA regulation 1910.217 and ANSI standard
B11.1-2009 to set the proper safety distance for personnel-guarding devices including light
curtains, two-hand controls, and type-B movable barriers. This test is performed at the press’s
most critical stopping point–90
°
. Follow these steps to perform the 90
°
stop-time test:
1.
Install the heaviest upper die you use on your press. Adjust the counterbalance for ram
weight, if your press has a counterbalance.
Before you can switch to Run mode, a tool must be programmed and loaded in Program
mode (see TOOL MANAGER, page 5-2).
NOTICE
Summary of Contents for SmartPAC2
Page 21: ...1126700 SmartPAC 2 User Manual xviii Table of Contents ...
Page 143: ...1126700 SmartPAC 2 User Manual 4 46 Initialization Mode ...
Page 197: ...1126700 SmartPAC 2 User Manual 5 54 Program Mode ...
Page 233: ...1126700 SmartPAC 2 User Manual 6 36 Run Mode ...
Page 245: ...1126700 SmartPAC 2 User Manual 7 12 Fault Messages ...
Page 271: ...1126700 SmartPAC 2 User Manual B 12 Updating SmartPAC 2 Firmware ...
Page 309: ...1126700 SmartPAC 2 User Manual E 6 Replacing SmartPAC 2 PC Board ...
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