HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 722)

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TNC 407/TNC 415/TNC 425 3 Machine interfacing 01.98
3 Machine interfacing
3.1 Machine parameters for digital speed control
The type of speed control - analogue or digital - can be selected for each individual axis.
The position and speed controllers receive their feedback signals from separate encoders. A linear
encoder (or angle encoder for rotary axes) is the standard device for measuring distances. Speed is
controlled by HEIDENHAIN rotary encoders that are fitted to the motor.
The new machine parameters for speed control make it possible to specify and optimise the control
loop. Irrespective of this the controller can still be operated as before in trailing mode or with feed
pre-control. The TNC 425 also positions in the manual modes in trailing mode.
The term "counting step" is one which is used in connection with the new machine parameters.
Counting steps are the counting pulses from the measuring system multiplied internally by a factor
of 256.
The following additional machine parameters are available for digital speed control:
MP1900 Select axes with digital speed controller
MP1910.x Monitor speed controller
MP1920.x Integral component for speed controller
MP1940.x Proportional component for speed controller
MP1950 Polarity for torque signal
MP1951 Select measuring system for position control
MP1955.x Ratio of grating period LS to ROD
MP1960 Compensation for reversal spikes on circular interpolation at the
quadrant transitions for digitally controlled axes
MP1970 Motion monitor for position and speed
MP1980 Delayed shutdown of speed controller in EMERGENCY STOP
The following machine parameters are inactive for axes with digital speed control.
MP1050 Analogue voltage for rapid traverse
MP1080 Integral factor
MP1140 Movement monitoring
MP1220 Automatic cyclical offset adjustment
MP1900 Select axes with digital speed controller
Entry: %XXXXX
Bit 0 X axis 0 = Without digital speed controller
Bit 1 Y axis 1 = With digital speed controller
Bit 2 Z axis
Bit 3 4th axis
Bit 4 5th axis