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HEIDENHAIN Technical Manual TNC 426, TNC 430
For the commissioning of new machines, HEIDENHAIN recommends
adjusting the PWM frequency to fit axis modules (normally 4 kHz, see
SIEMENS documentation). If the power module of the spindle gets too warm
in spite of a reduction of the PWM frequency from 5 kHz to 4 kHz, then the
reference value for the I
2
t monitoring (MP2303) or the rated current I
N
must
be reduced.
Reduction of the reference value for the I
2
t monitoring or the rated
current I
N
The reduction of the rated current I
N
of the power modules, as well as the
datum value for I
2
t monitoring can be calculated from two values (X1, X2) that
are given in the SIEMENS documentation.
The percent reduction of the rated current can be calculated with the following
formula:
n
X1 = Reduction factor of the current in % at a PWM frequency of 8 kHz
n
X2 = PWM threshold frequency in kHz at which the electrical power
reduction begins
n
f
PWM
= PWM frequency in kHz set in MP2180.0-8
This results in the reference value for I
2
t monitoring:
Example for a 50-A power module:
n
Axis power module with 50 A, PWM frequency of 5 kHz, X1 = 40 %, X2 =
4 kHz
n
Spindle power module with 50 A, PWM frequency of 5 kHz, X1 = 40 %, X2
= 3.2 kHz
Note
A reduction of the PWM frequency has no effect on the maximum speed,
but it means that the axis and the spindle without integral DSP must be
commissioned again.
X
R
[%]
100
100
X1
–
(
)
8 kHz
f
PWM
–
(
)
⋅
8 kHz
X2
–
--------------------------------------------------------------------------------------------
X1
+
è
ø
æ
ö
–
=
X
B
1
X
R
[%]
100
--------------------
–
=
X
R
[%]
100
100
40
–
(
)
8 kHz
5 kHz
–
(
)
⋅
8 kHz
4 kHz
–
----------------------------------------------------------------------------------------
40
+
è
ø
æ
ö
–
15 %
=
=
X
B
1
15
100
-----------
–
0 85
,
=
=
X
R
[%]
100
100
40
–
(
)
8 kHz
5 kHz
–
(
)
⋅
8 kHz
3,2 kHz
–
----------------------------------------------------------------------------------------
40
+
è
ø
æ
ö
–
22,5 %
=
=
X
B
1
22,5
100
-------------
–
0.78
=
=
Summary of Contents for TNC 426 CB
Page 12: ...2 2 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 51: ...December 2001 Software 2 41 ...
Page 54: ...2 44 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 61: ...December 2001 Software Releases 2 51 ...
Page 82: ...2 72 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 86: ...3 4 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 104: ...3 22 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 112: ...3 30 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 125: ...December 2001 Encoders 3 43 ...
Page 136: ...3 54 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 141: ...December 2001 Touch Probe Systems 3 59 ...
Page 145: ...December 2001 Data Interface 3 63 ...
Page 152: ...3 70 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 168: ...3 86 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 183: ...December 2001 BTS 1x0 Monitor Keyboard Switch 3 101 ...
Page 187: ...December 2001 Dimensions 3 105 3 23 Dimensions Note All dimensions in mm ...
Page 191: ...December 2001 Dimensions 3 109 3 23 4 LE 430 M Max 9 Axes Weight approx 9 kg ...
Page 196: ...3 114 HEIDENHAIN Technical Manual TNC 426 TNC 430 3 23 9 BTS 110 ...
Page 197: ...December 2001 Dimensions 3 115 3 23 10 BTS 120 ...
Page 201: ...December 2001 Dimensions 3 119 3 23 14 Handwheels HR 130 Weight approx 0 7 kg ...
Page 202: ...3 120 HEIDENHAIN Technical Manual TNC 426 TNC 430 HR 150 Weight approx 0 7 kg ...
Page 203: ...December 2001 Dimensions 3 121 HR 410 ...
Page 205: ...December 2001 Dimensions 3 123 HRA 110 Weight approx 1 5 kg ...
Page 206: ...3 124 HEIDENHAIN Technical Manual TNC 426 TNC 430 Control knob for HR 130 and HR 150 ...
Page 207: ...December 2001 Dimensions 3 125 3 23 15 Touch probe systems TT 130 ...
Page 209: ...December 2001 Dimensions 3 127 TS 220 Adapter cable for TS 120 TS 220 ...
Page 210: ...3 128 HEIDENHAIN Technical Manual TNC 426 TNC 430 EA 6x2 Receiver Unit ...
Page 211: ...December 2001 Dimensions 3 129 TS 632 ...
Page 212: ...3 130 HEIDENHAIN Technical Manual TNC 426 TNC 430 APE 652 ...
Page 213: ...December 2001 Dimensions 3 131 ...
Page 214: ...3 132 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 219: ...December 2001 3 137 3 24 5 Grounding plan TNC 426 M TNC 430 M with POWERDRIVE Inverter System ...
Page 231: ...December 2001 3 149 3 26 2 Cable Overview TNC 426 PB TNC 430 PA Basic Configuration ...
Page 240: ...4 2 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 310: ...4 72 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 312: ...5 2 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 319: ...December 2001 Overview of Modules 5 9 ...
Page 329: ...December 2001 Overview of Markers and Words 5 19 ...
Page 330: ...5 20 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 349: ...December 2001 Machine Axes 6 19 ...
Page 357: ...December 2001 Machine Axes 6 27 ...
Page 381: ...December 2001 Axis Error Compensation 6 51 ...
Page 416: ...6 86 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 420: ...6 90 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 438: ...6 108 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 450: ...6 120 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 463: ...December 2001 The Control Loop 6 133 ...
Page 468: ...6 138 HEIDENHAIN Technical Manual TNC 426 TNC 430 MP2600 0 MP2600 optimum ...
Page 476: ...6 146 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 509: ...December 2001 Monitoring Functions 6 179 ...
Page 551: ...December 2001 Spindle 6 221 ...
Page 629: ...December 2001 Display and Operation 6 299 ...
Page 675: ...December 2001 Keystroke Simulation 6 345 ...
Page 709: ...December 2001 Touch Probe 6 379 ...
Page 786: ...6 456 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 831: ...December 2001 Commissioning 6 501 ...
Page 846: ...6 516 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 848: ...6 518 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 1033: ...7 184 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 1035: ...8 2 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 1083: ...8 50 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 1085: ...9 2 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 1095: ...10 2 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...
Page 1114: ...December 2001 DSP Error Messages as of NC Software 280 476 01 10 21 ...
Page 1125: ...10 32 HEIDENHAIN Technical Manual TNC 426 TNC 430 ...