Baldor DSM S Series Specifications Page 63
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MN1957 Operation 5-17
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The remaining gain terms are Velocity Feed forward (KVELFF) and Acceleration Feed
forward (KACCEL) described below.
In summary, the following rules can be used as a guide:
KPROP: Increasing KPROP will speed up the response and reduce the effect of
disturbances and load variations. The side effect of increasing KPROP is that it also
increases the overshoot, and if set too high it will cause the system to become unstable.
The aim is to set the Proportional gain as high as possible without getting overshoot,
instability or hunting on an encoder edge when stationary (the motor will buzz).
KVEL: This gain has a damping effect on the whole response, and can be increased to
reduce any overshoot. If KVEL becomes too large it will amplify any noise on the
velocity measurement and introduce oscillations.
KINT: This gain has a de-stabilizing effect, but a small amount can be used to reduce any
steady state errors. By default, KINTMODE is always on (mode 1).
KINTLIMIT: The integration limit determines the maximum value of the effect of integral
action. This is specified as a percentage of the full scale demand.
KDERIV: This gain has a damping effect dependent on the rate of change of error, and
so is particularly useful for removing overshoot.
KVELFF: This is a feed forward term and as such has a different effect on the servo
system than the previous gains. KVELFF is outside the closed loop and therefore does
not have an effect on system stability. This gain allows a faster response to demand
speed changes with lower following errors, for example you would increase KVELFF to
reduce the following error during the slew section of a trapezoidal move. The trapezoidal
test move can be used to fine-tune this gain. This term is especially useful with velocity
controlled servos
KACCEL: This term is designed to reduce velocity overshoots on high acceleration
moves.
- MN1957 NextMove ESB-2 1
- Contents 3
- 5 Operation 4
- 6 Troubleshooting 4
- Appendices 5
- General Information 7
- 1 General Information 7
- Safety Notice 8
- Precautions 8
- 2.1 NextMove ESB-2 features 9
- 2-2 Introduction MN1957 10
- 2.2 Receiving and inspection 11
- 2.3 Units and abbreviations 12
- 3.1 Introduction 13
- 140 (5.51) 14
- 124 (4.9) 14
- 45 (1.8) 14
- 4.1 Introduction 17
- 4.1.1 Connector locations 18
- 4.2 Analog I/O 19
- 4.2.2 Analog outputs 21
- , Flex+Drive 22
- , MintDrive 22
- 4.3 Digital I/O 23
- 4-10 Input / Output MN1957 26
- MN1957 Input / Output 4-11 27
- 4.3.2 Digital outputs 28
- 4.4 Other I/O 29
- 4-14 Input / Output MN1957 30
- 4.4.3 Encoder inputs 0-4 31
- 4-16 Input / Output MN1957 32
- 4.4.4 Relay connections 34
- 4.4.5 USB port 34
- 4.4.6 Serial port 35
- 4.4.7 Using RS232 35
- 4-20 Input / Output MN1957 36
- MN1957 Input / Output 4-21 37
- 4.5.1 CAN connector 38
- 4.5.2 CAN wiring 39
- 4.5.3 CANopen 40
- MN1957 Input / Output 4-25 41
- 4.5.4 Baldor CAN 42
- MN1957 Input / Output 4-27 43
- MN1957 Input / Output 4-29 45
- 4-30 Input / Output MN1957 46
- 5.1 Introduction 47
- 5.1.4 Preliminary checks 48
- 5.1.5 Power on checks 48
- 5.2 Mint Machine Center 49
- 5.2.1 Starting MMC 50
- 5.3 Mint WorkBench 51
- 5.3.1 Help file 52
- 5.3.2 Starting Mint WorkBench 53
- 5-8 Operation MN1957 54
- 5.4 Configuring an axis 55
- 5.4.2 Selecting a scale 56
- MN1957 Operation 5-11 57
- 5-12 Operation MN1957 58
- 5.5 Stepper axis - testing 59
- 5-14 Operation MN1957 60
- MN1957 Operation 5-15 61
- 5-16 Operation MN1957 62
- MN1957 Operation 5-17 63
- 5-18 Operation MN1957 64
- MN1957 Operation 5-19 65
- 5-20 Operation MN1957 66
- 5.7.2 Underdamped response 67
- 5.7.3 Overdamped response 68
- MN1957 Operation 5-23 69
- 5.8.1 Calculating KVELFF 70
- MN1957 Operation 5-25 71
- 5-26 Operation MN1957 72
- 5.8.2 Adjusting KPROP 73
- 5-28 Operation MN1957 74
- MN1957 Operation 5-29 75
- 5-30 Operation MN1957 76
- MN1957 Operation 5-31 77
- 5.11 Saving setup information 78
- MN1957 Operation 5-33 79
- 5-34 Operation MN1957 80
- 6.1 Introduction 81
- 6.2 NextMove ESB-2 indicators 82
- 6.2.2 Communication 83
- 6.2.3 Motor control 84
- MN1957 Troubleshooting 6-5 85
- 6.2.4 Mint WorkBench 86
- 6.2.5 CANopen 87
- 6-8 Troubleshooting MN1957 88
- 6.2.6 Baldor CAN 89
- 6-10 Troubleshooting MN1957 90
- 7.1 Introduction 91
- 7.1.4 Digital inputs 92
- 7.1.6 Relay output 92
- 7.1.7 Stepper control outputs 93
- 7.1.8 Encoder inputs 93
- 7.1.9 Serial RS232/RS485 port 93
- 7.1.10 CAN interface 94
- 7.1.11 Environmental 94
- 7.1.12 Weights and dimensions 94
- EC Declaration of Conformity 95
- 7-6 Specifications MN1957 96
- A.1 Introduction 97
- A.1.2 Baldor CAN nodes 98
- A.1.3 HMI panels 99
- A.1.4 Baldor keypad 99
- A-4 Accessories MN1957 100
- B.1 Introduction 101
- MN1957 Index 115
- Index MN1957 116
- Comments 119
- Comments MN1957 120
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