Hp 220 User Manual Page 144
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7Ć6 Calibrations
C3187Ć90000
Accuracy Calibration
Purpose
The accuracy calibration procedure is used to correct the endĆpoint accuracy of the media
axis. The cartridge axis does not require calibration and is used to calibrate the media axis.
Perform the accuracy calibration whenever the:
EEROM is erased
Main PCA is replaced
Drive roller is removed or replaced
Media (XĆaxis) motor is replaced
What is the EndĆPoint Accuracy Specification ?
The endĆpoint accuracy specifies how accurately a plotter can draw a given length of line.
The endĆpoint accuracy specification for the plotters is ± 0.38 mm (0.015 in) or ± 0.2% of the
specified vector length, whichever is greater, at 23
C (73
F), at 50Ć60% relative humidity on
HP special polyester film. Use the following formula to calculate the plotter's accuracy:
Measured length – Desired length
Desired length
x 100 = %Error
What can Affect the EndĆPoint Accuracy ?
Various part tolerances inside the plotter affect the accuracy (in particular the drive roller).
Other outside influences include:
Media thickness. Thicker media creates longer lines.
Media expansion. As the media grows, so do the lines.
Application software. The software may be instructing the plotter to draw an incorrect
line length.
The EEROM has been cleared. The accuracy constants are stored in this nonĆvolatile
memory component.
(Further information chapter 5, .)
- 1
- 1
- 1
- Avda. Graells, 501 2
- 08190 Sant Cugat del Vallès 2
- Using this Manual 4
- Contents 5
- 13
- 14
- 14
- 15
- Description 16
- 17
- 17
- 17
- 17
- 17
- 18
- 18
- 18
- 18
- 19
- 19
- Power Requirements 20
- Choosing an Interface Cable 20
- Environmental Specifications 21
- Plotter Dimensions and Weight 21
- 23
- 23
- 25
- (0.25 in) 27
- Installing the Plotter 28
- Configuring the Plotter 29
- Verifying Plotter Operation 29
- 30
- 31
- Cleaning the Plotter 32
- 33
- Loading the Media 34
- Sensing Media Presence 34
- Gripping the Media 38
- Advancing the Media 39
- 40
- 40
- Stretching the Media 41
- Moving the Carriage 41
- Detecting the Media Edges 42
- Providing Ink 43
- 44
- 44
- 44
- Producing an Image 45
- 47
- Aligning the Cartridges 48
- Servicing the Cartridges 49
- Cooling the Electronics 50
- System Data Flow 51
- Plotter Architecture 53
- Main PCA 54
- 55
- 58
- 60
- Carriage PCA 61
- Front Panel PCA 63
- Power Supply 64
- 65
- 65
- Safety Precautions 66
- ESD Precautions 66
- Reassembly 66
- Required Tools 67
- 3/16 inch 68
- Repair Procedures 69
- 6Ć6 Removal and Replacement 70
- 6Ć8 Removal and Replacement 72
- 73
- 6Ć10 Removal and Replacement 74
- 76
- 78
- 79
- 80
- 82
- 83
- 6Ć20 Removal and Replacement 84
- 85
- 6Ć22 Removal and Replacement 86
- 87
- 88
- ! 90
- 6Ć28 Removal and Replacement 92
- 93
- 6Ć30 Removal and Replacement 94
- 6Ć32 Removal and Replacement 96
- 6Ć34 Removal and Replacement 98
- 6Ć36 Removal and Replacement 100
- C3187Ć90000 100
- 101
- 6Ć38 Removal and Replacement 102
- 103
- 6Ć40 Removal and Replacement 104
- 6Ć42 Removal and Replacement 106
- 6Ć44 Removal and Replacement 108
- 6Ć46 Removal and Replacement 110
- 6Ć48 Removal and Replacement 112
- 6Ć50 Removal and Replacement 114
- 6Ć52 Removal and Replacement 116
- 6Ć54 Removal and Replacement 118
- 119
- 120
- 121
- 6Ć58 Removal and Replacement 122
- 124
- 6Ć62 Removal and Replacement 126
- 6Ć64 Removal and Replacement 128
- 129
- 6Ć66 Removal and Replacement 130
- 6Ć68 Removal and Replacement 132
- 133
- 6Ć70 Removal and Replacement 134
- 136
- 136
- 136
- 137
- 137
- 137
- 139
- When to Calibrate the Plotter 140
- Service Mode 140
- Draft, Final, Paper 141
- Transl/Vellum 141
- Cartridge Alignment 142
- Accuracy Calibration 144
- Load Media 145
- Bail Calibration 146
- MediaĆSensor Calibration 147
- SetupĆSheet Calibration 148
- Troubleshooting 149
- Power On 150
- Extended PowerĆOn Self Test 151
- Mechanical Initialization 151
- What You Should See and Hear 152
- Errors Indicated by LEDs 153
- 155
- MediaĆpath/servo errors 157
- FirmwareĆCode Revision Level 159
- Troubleshooting Tips 159
- Servo ControlĆSystem Failures 160
- Frequent Cartridge Failure 160
- 161
- BailĆLiftĆMechanism Failure 162
- Ink Smearing 164
- Plots Joined or Not Plotted 164
- Incorrect Line Widths 164
- Problems in Loading Media 165
- Service Tests 166
- Test Description 167
- 8Ć20 Removal and Replacement 168
- 169
- Performing the Service Tests 170
- 173
- Reading the EEROM Text Block 174
- 8Ć28 Removal and Replacement 176
- Clearing the EEROM 177
- 8Ć30 Removal and Replacement 178
- Product History and 179
- Service Notes 179
- Introduction 180
- SerialĆNumber Format 180
- 181
- 181
- 181
- Figure 1 183
- Figure 2 184
- Administrative Information 186
- Date: 29 July 1994 186
- Bug Fixing 186
- EPROMs and Masked ROMs 187
- ReĆinstalling Teflon Washers 188
- Change in Trailing Cable 191
- Change in Carriage 192
- Parts and Diagrams 193
- Exchange Assemblies 194
- Replacement Parts 195
- 196
- DesignJet 200 chapter 9 198
- Window, Center and 199
- Bottom Covers 199
- To Carriage 199
- Left Endcover and Trim 203
- Right Endcover and Trim 205
- Carriage-Axis Drive 207
- (Left End) 207
- Parts List: Service Station 208
- Carriage Axis Drive 211
- (Right End) 211
- Parts List: Carriage Assembly 212
- Media Drive Assemblies 215
- 10Ć24 Parts and Diagrams 216
- Bail and Overdrive 219
- Assemblies 219
- Pinch-Arm Assembly 221
- Accessories 222
- 224
- 226
- 227
- 231
- Busy and Error LEDs 232
- Cancel key, bug fixed, 9Ć8 233
- Cartridge and Error LEDs 233
- Draft mode, 1Ć3, 5Ć14, 5Ć15 234
- Final mode, 1Ć3, 5Ć14, 5Ć15 236
- Load Media and Error LEDs 237
- Paper, 5Ć15 239
- Ready and Error LEDs 240
- Translucent, 5Ć15 242
- Vellum, 5Ć15 242
- 244
- 244
- Recycled paper 246
- Printed in France 9/94 246
- HP Internal Order Number 246
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