Mitsubishi Electric C80 Series Instruction Manual page 9

1. Items related to program development
Do not assign any startup switch for C80 on GOT's touch key. If a communication fault (including cable discon-
nection) occurs between GOT and CNC C80, the communication will be suspended and the GOT will become in-
operative. In this case, even when you release your hands from the startup switch, CNC will fail to recognize the
cutoff of startup signal, which may cause serious accidents.
2. Items related to operation
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 appropriate. 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 machine 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.
1. Items related to product and manual
For items described as "Restrictions" or "Usable State" in this manual, the instruction manual issued by the ma-
chine tool builder (MTB) takes precedence over this manual.
Items not described in this manual must be interpreted as "not possible"
This manual is written on the assumption that all the applicable functions are included. Some of them, however,
may not be available for your NC system. Refer to the specifications issued by the machine tool builder before use.
Refer to the Instruction Manual issued by each MTB for details on each machine tool.
Some screens and functions may differ depending on the NC system (or its version), and some functions may not
be possible. Please confirm the specifications before use.
Do not connect NC system to the Internet-connected network.
To maintain the safety of the NC system against unauthorized access from external devices via the network, take
appropriate measures.
2. Items related to installation and assembly
Ground the signal cables to ensure stable system operation. Also ground the NC unit main frame, power distribu-
tion panel and machine to one point, so they all have the same potential.
3. Items related to preparation before use
Always set the stored stroke limit. Failure to set this could result in collision with the machine end.
Always turn the power OFF before connecting/disconnecting the input/output device cable. Failure to do so could
damage the input/output device and NC unit.
4. Items related to screen operation
If the tool compensation amount or workpiece coordinate system offset amount is changed during automatic op-
eration (including during single block stop), the changes will be valid from the command in next block or after sev-
eral subsequent blocks.
All of the various data in the NC memory is erased when formatting. Be sure to use the transfer function to transfer
all necessary data to another storage device before formatting.
Pay close attention to the sequence operation when carrying out forced data setting (forced output) in the I/F di-
agnosis screen during machine operation.
WARNING
CAUTION