Mitsubishi Electric C80 series Maintenance Manual page 14

(4) Set up
Do not cancel the emergency stop before confirming the basic operation.
Always set the stored stroke limit. Failure to set this could result in collision with the machine end.
If the battery low warning is issued, save the machining programs, tool data and parameters in an input/
output device, and then replace the battery. When the battery alarm is issued, the machining programs, tool
data and parameters may be destroyed. Reload the data after replacing the battery.
Do not adjust the spindle when possible risks associated with adjustment procedures are not thoroughly
taken into consideration.
Be careful when touching spindle's rotating section, or your hand may be caught in or cut.
It is dangerous to restore the backup data of other machine when the absolute position is established be-
cause the zero point will be established with the absolute position of the linear axis rewritten, thus the zero
point position is off the right position. Initialize the zero point again.
Restoration by SRAM data is available only if the rotary axis motor has not rotated in a same direction
30,000 times or more since the acquisition of the data. Otherwise, the zero point of the rotary axis will
change by turning the power OFF and ON after writing the SRAM data, which will cause danger. Make sure
the zero point is not off the right position. The use of this method should be limited to when necessary, such
as when replacing an NC unit, and requires enough safety confirmation before executing.
(5) Operation and adjustments
If the operation start position is set from a block in the program and the program is started, the program
before the set block is not executed. Please confirm that G and F modal and coordinate values are appro-
priate. If there are coordinate system shift commands or M, S, T and B commands before the block set as
the start position, carry out the required commands using the MDI, etc. If the program is run from the set
block without carrying out these operations, there is a danger of interference with the machine or of ma-
chine operation at an unexpected speed, which may result in breakage of tools or machine tool or may
cause damage to the operators.
Under the constant surface speed control (during G96 modal), if the axis targeted for the constant surface
speed control moves toward the spindle center, the spindle rotation speed will increase and may exceed
the allowable speed of the workpiece or chuck, etc. In this case, the workpiece, etc. may jump out during
machining, which may result in breakage of tools or machine tool or may cause damage to the operators.
Check and adjust programs and each parameter before starting operation. Failure to observe this could re-
sult in unpredictable operations depending on the machine.
Do not make drastic adjustments or changes as the operation could become unstable.
In the explanation on bits, set all bits not used, including blank bits, to "0".
WARNING
CAUTION
CAUTION