Acceleration (B2)
4.4 Percentage acceleration correction, ACC
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
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4.4 Percentage acceleration correction, ACC
Function
Certain program sections can require the axis and spindle acceleration set via the machine
data to be changed using the program. This programmable acceleration is a percentage
acceleration correction.
ACC[channel axis name] = percentage
The ACC command in the program allows you to set a percentage for each axis (e.g. X) or
spindle (S1) of > 0% and ≤ 200%. The axis interpolation is then carried out with this
proportional acceleration.
The acceleration defined in the axis-specific MD32300 MAX_AX_ACCEL represents the
reference for one axis (100%).
For the spindle the reference (100%) corresponds to the active spindle mode and gear stage
(n = 1 ... 5):
● MD35200 GEAR_STEP_SPEEDCTRL_ACCEL[n] in open-loop control mode
● MD35210 GEAR_STEP_POSCTRL_ACCEL[n] in positioning mode.
Examples: N10 ACC[X]=80; 80% acceleration for the X axis
Effectiveness
The limitation is effective in all interpolation types of the AUTOMATIC and MDA modes. The
limitation is not active in JOG mode and during reference point approach.
The value assignment ACC [...] = 100 deactivates the correction (100% of the MD values) as
well as RESET and program end.
The programmed value is also active with dry run feedrate.
Error states
The acceleration limitation is not active in error states that cause a rapid stop with an open
position control loop (because the axis is stopped according to a braking ramp of the set
speed).
Note
A programmable value > 100% can only be carried out if the drives have appropriate
reserves - otherwise alarm messages are output.
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