HEIDENHAIN TNC 426 PB/M Technical Manual page 805

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Speed controller
December 2001
Adjusting the speed controller:
7 7 7 7
Deselect "Pass over reference point" by setting MP1340 = 0.
7 7 7 7
Ensure that the loaded PLC program fulfills the following conditions:
• Position control loop is closed (W1038/W1040 = 0). If the position
controller is not optimized, error messages appear if the position
controller is closed.
• Servo drive controller is enabled (Module 9161)
• NC stop is inactive, M4560 = 1
• Axis direction buttons active
• Axes are clamped
7 7 7 7
In the MANUAL mode, use the oscilloscope function to select a step
function (approx. 500 mm/min) that will not overdrive the speed controller,
i.e. that does not limit I NOMINAL.
Display the nominal velocity value V (NOM RPM), the actual speed value V
(ACT RPM) and the nominal current value I NOMINAL.
7 7 7 7
Activate the step function with the axis direction buttons.
7 7 7 7
To change the machine parameters, press the MP EDIT soft key in the
setup menu.
7 7 7 7
Increase MP2500.x (P factor) up to the oscillation limit.
MP2500 at the oscillation limit
Commissioning
6 – 475

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