Rockford Systems, LLC
26
Call: 1-800-922-7533
SSC-1500 Part Revolution Solid-State Control
SECTION 3—INSTALLATION OF COMPONENTS
1.
When the modes of operation of
Off, Inch, Single Stroke, Foot Switch Single Stroke, Two-Hand Walk-Away Continuous, Automatic Single Stroke,
Continuous-On-Demand, and One-Hand/Foot Trip
are furnished, a palm button assembly will consist of four buttons (two black run/inch buttons
with ring guards, one red emergency-stop button, and one yellow top-stop button). Four mounting boxes are supplied (three double-hub and one
single-hub). Optionally available are the Touchdown!™ or chrome light-push palm buttons. These may be furnished in place of the standard black
run/inch palm buttons. These palm buttons can be assembled in the order shown in Figure 3.4 and mounted according to the requirement of the
application. Nipples, conduit, and wire for connecting the mounting boxes are not furnished.
Install the palm run buttons in such a way that it requires the use of both
hands to cycle the press.
2.
The two run palm buttons, on part revolution-type machines, can be used to initiate a machine cycle and as a method of safeguarding the point of
operation. In both instances, OSHA and ANSI have established certain requirements for these buttons. For your convenience we have reproduced
the pertinent sections of OSHA 29 CFR 1910.217 as well as the safety distance formula for two-hand control from ANSI B11.1. These sections
cover two-hand control as an initiating means and two-hand control as a point-of-operation safeguard for part revolution clutch presses.
Please read and make sure you understand the following sections before proceeding with the mounting of the two run buttons.
OS HA 1910.217 (b)(7)(v) for two-hand control used as a method of initiating a press cycle only:
(
v) Two-hand controls for single stroke shall conform to the following requirements:
(a) Each hand control shall be protected against unintended operation and arranged by design, construction, and/or separation so that the
concurrent use of both hands is required to trip the press.
(b) The control system shall be designed to permit an adjustment, which will require concurrent pressure from both hands during the die
closing portion of the stroke.
(c) The control system shall incorporate an antirepeat feature.
(d) The control system shall be designed to require release of all operators’ hand controls before an interrupted stroke can be resumed.
The above description covers the use of two palm buttons as a method of actuating a press cycle. It does not
provide any form of point-of-operation safeguarding. Some other properly applied and installed guard or device
must be provided in accordance with OSHA 1910.217 (c) using the run palm buttons as an actuating means.
Figure 3.4
Note: These are the operator controls required with the
continuous mode of operation.
Prior-Action Push Button Part
No. LLD-1500*
*Not included in palm button assembly. Must be ordered separately.
Palm Button Assembly
(continued)
(Continued on next page.)
