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TB104 Rev1 ATC6 Modifications
Overview
This document details the changes made to the M400 ATC controls as of the ATC6 revision The changes
made for the ATC6 modification involve the wiring of the spindle inverter FWD/REV commands to the KOYO
instead of the PLC3/3 outputs as previously used Also the handling of low air messages is different If the low
air happens during a tool change M6 then the control is stopped as if the E stop was pressed The E stop
must be engaged when the air pressure is normal in order for another tool change to work properly Another
minor change is the way in which the orient complete signal works In the ATC6 programs once the orient
complete signal is first seen it is latched until the M19 command is canceled by an M5 or the E stop is
pressed What happened before is that if the inverter orient signal dropped out for whatever reason and then
the re orient operation was started again which would cancel an M15 air blow and unclamp and M80 tool
carousel in
How to change from an ATC3 to an ATC6 model
The physical wiring of the electrical cabinet and the KOYO and Centroid PLC program software must be
changed to accommodate the ATC6 modifications Refer to the schematics K0000041 ATC3 and K0000072
ATC6 for comparison between the two wiring schemes and as an aid in following the steps below Note that
these schematics are for M400 ATC's with Mitsubishi inverters Centroid DC Drives and Yuasa rotary tables
Other versions with FUJI inverters Yaskawa AC drives or Troyke rotary tables will have different schematics
but the fundamental changes for ATC6 remain the same Â
Do a tool change to tool#1 and then power down the control
Locate CNT1 the E stop contactor Remove the 95 WHT wire
Insert a new wire from the 95 WHT going to KOYO OUTMOD1 NO5
Remove the 96 BLK wire on CNT1
Insert a new wire from the 96 BLK going to KOYO OUTMOD1 NO6
Place a jumper from KOYO OUTMOD1/C0 to OUTMOD1/C5 and OUTMOD1/C6
Replace the PLC3/3 with one having modified connectors and capacitor modifications
Replace the OPTIC232 with one having modified connectors
Power up the control
Update the KOYO PLC program to either ATC6 16 * or ATC6 20 * depending upon the number of
tool stations It is recommended that the existing KOYO PLC program be compared against the
Centroid factory supplied ATC3 program before the PLC program is overwritten with the ATC6
programs Refer to technical document TB105 Quick Start KOYO Tutorial
for instructions on how to
do this
Update the Centroid PLC software to the ATC6 version using an ATC6 PLC Program Update Disk
An update disk is available at the Centroid FTP site at ftp centroidcnc com Please read the index txt
file at the FTP site for a description of the available files Â
Testing
Issue an M18 in MDI to reset the tool number
Start the spindle and verify that forward and reverse operations are both working
Document History
Rev1 Created on 2000 08 24