6 – 128 HEIDENHAIN Technical Manual TNC 426, TNC 430
Digital axes:
For digital axes, the maximum feed rate also depends on the number of pole
pairs in the drive motor and the pitch of the ballscrew.
Analog axes:
7
77
7 In MP1050.x, enter the desired analog voltage for rapid traverse.
7
77
7 Adjust the rapid traverse feed rate (v
max
) with the analog voltage at the
servo amplifier.
MP1010.0-8 Rapid traverse in axes 1 to 9
Input: 10 to 300 000 [mm/min]
MP1020.0-8 Manual feed rate for axes 1 to 9
Input: 10 to 300 000 [mm/min]
MP1050.0-8 Analog axes: Analog voltage for rapid traverse in
axes 1 to 9
Input: 1.000 to 9.000 [V]
Digital axes: without function
Input: 1
Position loop
resolution
The encoder signals are interpolated 1024-fold.
Analog axes The TNC outputs a voltage per position error. The 10-V analog voltage is
subdivided 65536-fold with a 16-bit D/A converter. This results in a smallest
voltage step of 0.15 mV.
Rapid traverse (MP1010.x) is attained at a certain voltage (MP1050.x). This
results in the voltage ∆U per position error or following error s
a
:
If ∆U is divided by the smallest possible voltage step (0.15 mV), the result is
the number n of the possible voltage steps per position error.
Set Reset
M4587 Feed rate limit exceeded F MAX PLC PLC
D596 Max. feed rate from PLC [mm/min] NC/PLC PLC
D360 Programmed feed rate NC NC
D388 Current tool feed rate [mm/min] NC NC
v
max
[mm/min]
24 000
No. of pole pairs
---------------------------------------------------- [ 1 / min ] B a ll s c rew p itc h [ m m]⋅=
Pos. loop resolution [µm]
signal period [µm]
1024
--------------------------------------------------------
=
U
∆
MP1050.x [mV
S
a
[µm]
----------------------------------------
=
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