HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 201)

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TNC 407/TNC 415/TNC 425 3 Servo positioning of the NC-axes 01.98
The fine control of the precontrolled speed set-value is influenced by the Kv factor for feedforward
control MP1510.
The transient response when accelerating is defined separately by MP1530 in software types 243
05, 259 96, 243 07 and 243 02.
U [V]
t [ms]
If the Kv factor is too large, the system will oscillate about the precontrolled speed set-value.
The size of the Kv factor is normally the same as the Kv factor for operation with lag distance.
Depending on the dynamic characteristics of the machine it may also be higher (see "Commissioning
and start-up procedure").
A second set of k
v
factors can be defined in machine parameter MP1515.x and selected with M
function M105 (see section "Display and operation").
MP1530 Damping factor for transient response
(Only with software types 243 05, 259 96, 243 07, 243 02)
Entry: 0.010 to 0.999
MP1520 Transient response
Entry: value 0.100 to 10.000
MP1510 Kv factor for feedforward control (M105)
Entry: 0.100 to 20.000 [
m/min
mm
]
MP1510.0 X axis
MP1510.1 Y axis
MP1510.2 Z axis
MP1510.3 4th axis
MP1510.4 5th axis
MP1515 Kv factor for feedforward control active after M105
Entry: 0.100 to 20.000 [
m/min
mm
]
MP1515.0 X axis
MP1515.1 Y axis
MP1515.2 Z axis
MP1515.3 4th axis
MP1515.4 5th axis