This document describes the procedure for preparing the oven for rotation. This is an operator's guide --- not an engineering manual. Remember that many mechanical and electrical checks are made as part of the preflight sequence before heating begins.
Clear Inside Pedestal Area.
Close and Lock Lower Door.
Insert Key in Control Panel Interlock Switch. Leave it OPEN.
Clear Hearth Level Platform and Install All Railing Sections.
Make Sure All Personnel Are Clear of Oven Except Operator.
Insert Keys in Control Room Interlock Switches and CLOSE Interlocks.
Start with Rotation Control Panel Power Switches OFF.
Verify Main Oven (Casting) Power is ON with Wall Breakers, and that each Drive is plugged into the appropriate beam-level three-phase twistlock.
Set CONTROL Switch to MANual (very important).
Set Manual Speed Dials to Zero (000), counterclockwise.
Turn Each Rotation Control Panel Power Switch ON. Warning Strobes Should Begin Flashing. Control Power Red Indicators Should Light. These are labelled POWER #0 and POWER #2. If not, Check that motor controllers are plugged in to a live source.
You are now ready to move the oven to verify that there are no obstructions.
Turn Key in the Interlock Switch to CLOSED.
Press REVERSE (or FORWARD) Buttons to Arm Rotation on both drives. Horn will sound. Hold Button Down. Green Motor Power Indicator Lights will come on.
Use manual control knob to set a fractional RPM speed. Oven will begin to Rotate. Use knobs to rotate the oven a full revolution at slow speed on each drive.
Then bring the oven to a complete stop.
Press the red stop button to disarm the drives.
Set DIGITAL CONTROL Switch to COMPuter.
Set Thumbwheel Switches to the Ultimate Casting Speed for Backup.
The R-computer should be running.
A schedule, preferably starting from zero, should be running in the rotation zone on the VME computers. The desired speed will be displayed on the LED readouts by both of the R-Computers.
Allow 60 seconds for Digital Controllers to Reset and for R-computers to load in the computer set speed.
Verify Computer Selected Speed on Both LED Displays. Display is X.YYY RPM.
Set CONTROL Switch to #1 to select the digital controllers. (Do NOT use the CONTROL Switch in position #2 except for engineering tests.)
Press REVERSE (or FORWARD) Buttons to Arm Rotation on both drives. Horn will sound. Hold Button Down. Green Motor Power Indicator Lights will come on.
If selected speed is zero (0.000), No Further Warning Will Be Given. Computer has Control of Rotation Speed.
Press the Red STOP Button.
or
OPEN Any Interlock Switch; (both switches in the Control Room)
or
Turn off Main Oven Power Breakers.