ASDA-M Chapter 7 Motion Control
Revision December, 2014 7-31
The Necessity
of Master Axis
The master axis is necessary. The master axis is unnecessary when
it is applied to constant speed motion.
It will do by using the internal signal of
the servo drive.
Flexibility
It is inconvenient to change
and modify and it is expensive
as well.
It will do by re-setting the parameter.
Maintenance
Machine will wear and the
maintenance is necessary.
No need to maintain.
Others
The master axis needs space
and it consumes energy as
well.
Save the space and energy which
protects the environment.
The main feature of E-Cam is as the followings:
Features of E-Cam
Operation
Operate the E-cam in PR mode only.
Active the E-Cam
Function
P5-88.X
0: disable E-cam function and force to disengage (default).
1: enable E-cam function and starts to judge the engaged
condition.
E-cam Status
Stop/Pre-engage/Engage
Source of Master Axis
Auxiliary encoder (linear scale)
Pulse command
CAP axis (defined by CAP function)
PR command
Time axis
Synchronous capture axis
Motion Command of
the Servo Drive
The overlap motion command issued by PR and E-Cam
Command of the Servo Drive ＝ E-Cam command ＋ PR
command
The command will be issued only in Engaged status
PR command is effective regardless to the E-Cam status.
Except when E-cam is engaging and the source of master
axis is PR command, PR command is 0.
When E-Cam is operating, its position still can be adjusted by PR
command (incremental command in general).
Data Storage
Address of E-Cam
It is stored in Data array and the start address is set by
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