Digital Speed Control; Block Circuit Diagram Of Tnc 425 With Integral Speed Controller - HEIDENHAIN TNC 415 Technical Manual

1 Digital speed control

A digital speed controller has been integrated into the TNC 425.
The benefits of this concept are:
•
High dynamic response
•
High Kv factor
•
Trailing errors are virtually "nil"
•
No drift
•
High geometrical accuracy with high traverse speeds
•
Traverse speeds up to 60 m/min
Cycle times: Contour interpolation 3 ms
Fine interpolation 0.6 ms

Block circuit diagram of TNC 425 with integral speed controller

TNC 425
Feed forward control
Position controller
Nominal +
Nominal
–
position speed
(digital)
11-2 TNC 407/TNC 415/TNC 425
Servo Amplifier
Acceleration
precontrol
Digital speed
control
+ Nominal +
current
– –
1 Digital speed control
Current
controller Power stage
Actual current
Actual speed
Actual position
Machine
Feed motor with
rotary encoder Machine slide
for rotor speed with linear
and position encoder
01.98