Browse Prior Art Database

Non-Interfering Manual Circuit for Tool Control Computer Systems

IP.com Disclosure Number: IPCOM000121042D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 4 page(s) / 157K

Publishing Venue

IBM

Related People

Adams, EM: AUTHOR [+3]

Abstract

Described is a non-interfering manual control switching circuit for use in automated tool control computer systems. The circuit establishes a known state for automated tooling so that no motion of tool devices will occur when leaving or entering manual mode. Also presented is an add-on circuit to provide additional control functions.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Non-Interfering Manual Circuit for Tool Control Computer Systems

      Described is a non-interfering manual control switching
circuit for use in automated tool control computer systems. The
circuit establishes a known state for automated tooling so that no
motion of tool devices will occur when leaving or entering manual
mode.  Also presented is an add-on circuit to provide additional
control functions.

      The non-interfering manual control circuit provides the ability
to diagnose and maintain tool devices, while not interfering with
automated control functions of computer applications.  The circuit,
as shown in Fig. 1, consists of controller enclosure (CE) 10 and
multiple panel enclosure (MPE) 11 which interfaces to tool control
unit (TCU) 12 of the system.  Although multiple MPEs 11 can be
connected to CE 10, only one MPE 11 is shown for simplicity.

      Within CE 10, switch 13 provides 24 VDC to either the automatic
control drivers within TCU 12 through normally closed relay point 14
or to the circuits within MPE 11. When switch 13 is in manual mode,
control signals from the computer are disabled.  When switch 13 is in
automatic mode, control signals from the computer are enabled as long
as manual control switches (MCSs) 15 and 15a are off.  Light 16
indicates to the user that the system is in manual mode. Light 17
indicates to the user that the system is in automatic mode.  Light 18
notifies the user that MCSs 15 and 15a are closed.

      Mode control relay (MCR) 19 is energized whenever MCSs 15 and
15a are closed.  This causes MCR contact 20 to close so as to provide
power to keep MCSs 15 and 15a active, even when switch 13 disables
manual mode.  When MCR 19 is energized, MCR contact 14 is open,
disabling automatic control devices within TCU 12, thereby preventing
further operation of the computer control functions.  Momentary
contact switch (SM) 21 provides manual control for MPE 11. Manual
latch ing relay (MLR) 22 is energized when SM 21 is pushed and switch
13 is in manual position.  MLR contact 23 closes when MLR 22 is
energized latching power to MLR contact 23 as long as there is 24 VDC
to MPE 11.  MLR contact 24 also closes when MLR 22 is energized.
This allows 24 VDC for the manual switch controls MCSs 15 and 15a.
When MCSs 15 and 15a are closed, power is applied to tool device
drivers (TDDs) 25 and 25a which turns on the tool device (not shown).
Manual control is disabled at MPE 11 only when switch 13 is removed
from manual mode and MCSs 15 and 15a are not closed at any MPE 11
in the system.

      When any MCSs 15 and 15a are closed, 24 VDC is supplied to CE
10 energizing MCR 19 which opens MCR contact 14, thereby disabling
computer control circuitry.  Also, when MCR 19 is energized, MLR
contact 23 closes and lights light 18.  With MCSs 15 or 15a cl...