User Manual 08/2003 Edition

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5 5 Description of the Functions 02.99 04.01 5.5 SIMODRIVE POSMO A functions 270° Positioning type = ABSOLUTE Example 1 (PSW.12 = ”0”): P81:4 = 315 P82:4 = –100 ––> Traverse with 100 % to 315 negative Example 2 (PSW.12 = ”0”): P81:4 = 315 P82:4 = 100 ––> Traverse with 100 % to 315 positive 5-160 315° 225° 0° Example 1 180° 45° 135° 90° Example 2 Fig. 5-10 Example: Programming rotary axes Signaling position (P85:28) Signaling position (P55) Software limit switch 270° 315° 225° 0° 180° Example 1 45° Start Start 135° 90° Example 2 Positioning type = RELATIVE Example 1: P81:4 = –90 P82:4 = 100 ––> Traverse with 100 % through 90 negative Example 2: P81:4 = 135 P82:4 = 100 ––> Traverse with 100 % through 135 The following should be observed for the signaling position: Before SW 1.3 the following applies: – The drive has precisely one zero position (refer to Chapter 5.5.1). The signal position is viewed, referred to this position. – A modulo evaluation is not made. The following is valid from SW 1.3: – The signal position is saved, evaluated as modulo value The software limit switches act the same as for a linear axis. P6 software limit switch, start (refer to Chapter 5.6.2) P7 software limit switch, end The software limit switches are de–activated with P6 = P7. Siemens AG 2003 All rights reserved SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition
02.99 04.01 Siemens AG 2003 All rights reserved SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition 5.5 SIMODRIVE POSMO A functions 5.5.5 Backlash compensation and correction direction (from SW 1.4) Description Example: Determining the backlash When an indirect measuring system is used (position measuring encoder at the motor), at each direction reversal, the mechanical play is first traveled through before the axis moves. For this measuring system, mechanical play falsifies the traversing distance. This is because at direction reversal, the axis moves too little by the absolute value of the play. After entering the backlash compensation and the correction direction, at each direction reversal, the axis actual value is corrected depending on the actual traversing direction. M G Table Backlash ÏÏÏ ÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ M Motor G Encoder For a direction reversal, the encoder actual value leads the actual value (table) ––> the table does not traverse far enough Fig. 5-11 Backlash 5 Description of the Functions The following procedure is recommended to determine the backlash of an axis: Traverse the axis e.g. in the positive direction – take up the play Mount a dial gauge on the axis mechanical system Note down the actual position 1 (read P40) Traverse the axis in the negative direction until axis movement can be detected at the dial gauge Note down the actual position 2 (read P40) The backlash is obtained from the difference between actual position 1 and actual position 2. 5-161 5
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User Manual 08/2003 Edition simodri
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Foreword Information about using th
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6 6 Fault Handling and Diagnostics
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7 7 Installation and Service 04.01
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A A Abbreviations 04.01 GSD HEX HW
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A A Abbreviations 04.01 STB STW SW
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B B References 05.03 Electronic Doc
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C C Dimension Drawings 02.99 08.03
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D D EC Declaration of Conformity 08
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D D EC Declaration of Conformity 08
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E E Index 08.03 Diagnostics LED, 1-
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E E Index 08.03 O Offline with Simo
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