HEIDENHAIN TNC 335 Technical Manual - Manual (Page 102)

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TNC 360 1 Machine Axes 4-5
1 Machine Axes
The HEIDENHAIN contouring controls TNC 360/TNC 335 permit the control of up to four machine
axes and the spindle (see also section "Servo positioning").
The machine parameter MP10 can be set to determine which axes should be operational on the
machine. If necessary, MP10 can be used to select all the axes functions (control, display, pass over
reference marks etc.).
MP10 Active axes
Input range: 1 to 15
Bit 0 X axis +0 = not active
+1 = active
Bit 1 Y axis +0 = not active
+2 = active
Bit 2 Z axis +0 = not active
+4 = active
Bit 3 4th axis +0 = not active
+8 = active
1.1 Encoders
Incremental measuring systems can be attached to the HEIDENHAIN contouring controls.
See also chapter "Mounting and electrical installation ."
1.1.1 Signal period
The signal period of the attached measuring system in
µ
m or
1
1000
°
is entered in the machine
parameter MP330.x .
Linear measurement
For linear measurement systems with sinusoidal output signals the signal period is the same as
the graduation period:
Signal period (~) = grating period
The standard linear encoders from HEIDENHAIN have a graduation period of 20
µ
m
(LS models; except for LS 101 and LS 405: 10
µ
m) and 100
µ
m (LB model). If linear measurement is
performed by rotary encoder and ballscrew, the line count of the rotary encoder (see encoder
technical data) as well as the ballscrew pitch must be considered when calculating the signal period:
Signal period (~) =
ballscrew pitch [mm] · 1000 [
µ
m/mm]
line count
Up to 3 decimal places can be entered in MP330.x. If traverse is 60 m/min, the signal period must
not be less than 20 µm, because then the frequency would fall below the lower limit of 300 kHz.