Pull Tractor sensor
Figure 4-4. Pull Tractor Sensor Position Adjustment
4.1.5 Carriage Guide Shaft Parallelism Adjustment
The rear carriage guide shaft must be parallel to the platen. If it is not, printing may be abnormal because paper is not fed evenly at the left and right sides of the platen. A paper jam may occur. This adjustment is required when the rear carriage guide shaft is removed during carriage mechanism disassembly, the parallelism adjust lever is moved, or the platen is removed. Do not remove the printer mechanism (If remove the printer mechanism from the lower case, the adjust value will be out of order when you reassemble the printer mechanism to the lower case.) Also, it is necessary to remove the tension roller shaft before performing this adjustment. (Refer to Section 3.2.6.7.)
Acaution
The parallelism is adjusted so that the difference between the distances (from the rear carriage guide shaft to the platen measured at the two positions shown in Figure 4-5) is less than + 0.015 mm. Since this value is extremely small, you must use the two dial gauges, dial gauge base, and dial gauge master supplied by EPSON. Do not adjust the parallelism using any other method.
0 Dial gauge base #F611 (Part No. B1019467)
0 Dial gauge master #F612 (Part No. B1019468).
Before performing the carriage guide shaft parallelism adjustment, you must assemble the two dial gauges, dial gauge base, and dial gauge master to form one tool. Follow these steps:
Step 1: Attach the two thumb screws for the dial gauge base to the dial gauge master. To eliminate any play between the dial gauge base and the dial gauge master, pull the tie band to secure the dial gauge base and the dial gauge master before you securing the thumb screws.(Do procedure with two men.)
Step 2: Attach a dial gauge needle to the surface of the dial gauge master (approx. 2.00 mm depth), then tighten the hexagonal screw securing the dial gauge to the dial gauge base.
- Figure 4-6. Dial Gauge Set Up 1
Step 3: Attach the another needle to the master surface, APPROX. 2.00 mm depth, then correspond to the another gauge measure, and tighten the hexagonal screw.
Figure 4-7. Dial Gauge set Up 2
3. Tighten the hexagonal screw.
2. Attach the gauge needle to the master surface, then correspond to the another gauge measure.
Figure 4-7. Dial Gauge set Up 2
Step 5: Set the black marker to the "0" position.
Step 6: Remove a CP(PS)(M3X6) screw securing the timing belt holder to the timing belt, then remove the timing belt holder.
- Figure 4-9. Carriage Plate Removal
Step 7 Step 8 Step 9
Remove the paper bail assembly. (Refer to Section 3.2.6.5.)
Remove the tension roller shaft. (Refer to Section 3.2.6.7.)
Remove the printhead with the mask-less holder. (Refer to Section 3.2.1.)
Step 10: Attach the dial gauge base with the dial gauge in the same way as you attach the print head.
Then you attach this tool to the carriage, tighten the two thumb screws while you pulling the dial gage base toward you.
Step 11: Using the carriage guide shaft gear, adjust the gauge mounting position so that the tips of the gauges (portions A and B in the Figure 4-10) are securely attached to the platen.
Dial Gauge Master
Refer to Figure 4-10a.
Dial Gauge Master
Platen Carriage
Dial Gauge Base
Dial Gauge x2
Tie band
Figure 4-10. Dial Gauge Attachment
Platen Carriage
Dial Gauge Base
Dial Gauge x2
Tie band
Figure 4-10. Dial Gauge Attachment
CR Guide Shaft Gear _
Stopper
CR Guide Shaft Gear _
PG Transmission Gear
Figure 4-10a. CR Guide Shaft Gear Positioning
Step 12: Measure the distance between the platen and the carriage guide shaft on the left side. Then measure the distance between the platen and the rear carriage guide shaft on the right side, and compare these values.(Figure4-11 shows the measurement position and the parallelism adjust lever operation.)
Note: When you shift the carriage manually, do not touch the both dial gauges. Rotate the carriage motor pulley.
70mm
70mm
- 70mm
Right Side Frame
Carriage Motor
Figure 4-11. Carriage Guide Shaft Parallelism Adjustment
Right Side Frame
Carriage Parallelism Adjust Lever
Carriage Motor
Motor Pulley
Figure 4-11. Carriage Guide Shaft Parallelism Adjustment
Step 13: If the distance measured at the left side is greater than that measured at the right side, move the parallelism adjust lever in the direction shown by the white arrow in Figure 4-9. If the distance measured at the left side is less than that measured at the right side, move the lever in the direction shown by the black arrow.
Notes 1: The carriage guide shaft moves as shown in Figure 4-8. For example, when the parallelism adjust lever is moved in the direction of the black arrow, the distance between the right side of the platen and printhead nose narrows a little bit.
Notes 2: The carriage guide shaft moves as shown in Figure 4-8. When the parallelism adjust lever is moved in the direction of the black arrow, the distance between the right side of the platen and print head nose narrows a little bit.
Step 14: Repeat steps 11 and 12 until the distance between the distance measured at the two positions is less than + 0.015 mm.(The #F610 dial gauge matches the + "15" notches.)
Step 15: When the distance is within the specified range, tighten the two CP(PS)(M4 X 6) screws securing the parallelism adjustment lever. Then measure the distances again, as described in step 11.
Step 16: If the distance between the measured distances is within the specified range, apply screw lock to the two screws.(Refer to Section 6.2 for lubrication and adhesive application instructions.)
Step 17: Go to Section 4.1.6 platen angle adjustment.
- Carriage Guide Shaft Rear
Guide Shaft Holder Lever (Right)
Guide Shaft Holding Spring
Carriage Motor Holder
Figure 4-12. Parallelism Adjustment Lever Operation arallelism Adjustment Lever CP(PS)(M4X6)
Guide Shaft Holder Lever (Right)
Guide Shaft Holding Spring
Carriage Motor Holder
Figure 4-12. Parallelism Adjustment Lever Operation
4.1.6 Platen Angle Adjustment
This section describes the platen angle adjustment. The platen must be at a right angle to the carriage assembly. This adjustment is required when the platen is removed or replaced or when the two hexagonal screws securing the platen to both side frames are loosened. Do not remove the printer mechanism from the lower case. (If remove the printer mechanism from the lower case, the adjust value will be out of order when you reassemble the printer mechanism to the lower case.) Also, it is necessary to remove the tension roller shaft be fore performing this adjustment. (Refer to Section 3.2.6.7)
Acaution
The parallelism is adjusted so that the difference between the distances (from the rear carriage guide shaft to the platen measured at the two positions shown in Figure 4-7) is less than + 0.015 mm. Since this value is extremely small, you must use the two dial gauges, dial gauge base, and dial gauge master supplied by EPSON. Do not adjust the parallelism using any other method.
0 Dial gauge #F610 (Part No. B1019466)
0 Dial gauge base #F611 (Part No. B1019467)
0 Dial gauge master #F612 (Part No. B1019468).
Step 1: Perform the carriage guide shaft parallelism adjustment. (Refer to section 4.1.5) After the adjustment is finished, leave the dial gage unit on the carriage. Step 2: Remove the pull tractor sensor.(Refer to Section 3.2.6.10.)
Step 3: Loosen (but do not remove) the two hexagonal screws securing the platen stay to both side frames.
Hexagonal Screws (M4X8)
Side Frame L Side
- Positioning Tab
Side Frame R Side
Figure 4-13. Loosing Hexagonal Screws
Step 4: Using the carriage guide shaft gear, attach the both dial gauge needles to the platen surface.(The needle doesn't reach the end of the stroke).
Step 5: Measure the angle difference about three position such as figure below.(Using the CR motor pulley to move the carriage with the dial gauge toward the right side. See Figure 4-11.)
- Figure 4-15. Measuring Angle Difference 1
Figure 4-16. Measuring Angle Difference 2
Platen
Down
(Angle Adjustment Method)
Figure 4-16. Measuring Angle Difference 2
Step 6: If the angle difference of two values are more than + 0.015 mm, loosen (but do not remove) the two hexagonal screws securing the platen stay to both side frames, then change the platen angle slowlly and manually.)
Step 7: Tighten two hexagonal screws securing the platen stay to both side frames.
Acaution
After perform the adjustment, confirm the value of platen parallelism again. When this value is out of order, readjust the platen parallelism and the platen angle adjustment until the value to be correct.
4.1.7 Platen Gap Motor Value Adjustment
This section describes how to measure the parameter (ALPHA and BETA values) for the PG mechanism unit. Since the ALPHA and BETA values are unique to each mechanism unit, it is written on the label as shown in Figures 4-17 and 4-18, so that it can be confirmed at glance. Be sure to perform this measurement and correct the value written on the label because the value is necessary when the other units (board, printhead) are changed.
Acaution
0 This measurement is important because it determines the platen gap, so be sure to use the exclusive thickness gauge set and tension gauge.
Thickness gauge (0.43 mm)
Thickness gauge (0.80 mm)
Tension gauge (200 g) : #F545 (EPSON Part No. B765114601)
0 Do not turn the printer off during adjustment.
When adjusting the platen gap to narrower or wider using the Micro Feed A) and Micro Feed (v) switches, be sure to adjust the gap by 1 step at a time.
0 After perform this adjustment, perform the Bi-Directional adjustment as explained in section 4.1.8.
- Printhead
Figure 4-17. ALPHA Value Print
ALPHA Value Print
Side Frame (Left)
BETA Value
5 mm or less
3I600000X XXXXXXXX |
Figure 4-17. ALPHA Value Print
Figure 4-18. BETA Values Print
Step 1: Remove the paper, ribbon cartridge, and ribbon mask holder from the printer. Then confirm the
ALPHA value written on the print head nose. Step 2: Close the top cover.
ALPHA Value Write Mode :
Step 3: Turn the printer on while pressing the Tear Off, Micro Feed (v), and Front/Rear switches. At this time the printer performs PG home position seek. and the carriage moves to the 15 column. Step 4: The panel indicates the current ALPHA adjustment value (Refer to Table 4-1.). Step 5: Write the ALPHA value written on the print head into the memory.
• Press the Micro Feed (v) switch to increment value by +1.
• Press the Micro Feed (A) switch to decrement the value by -1.
Step 6: 1) When you finish the adjustment (such as you have replaced the print head.), press the LF/FF Load SW, then the ALPHA value is written to the EEPROM and finish the adjustment mode. Then turn the power off and install the ribbon mask holder and the ribbon cartridge. 2) When you continue the BETA values write operation, press the Pause SW, then the ALPHA value is written to the EEPROM and enter to the BETA values write mode.
BETA Values Write Mode :
Step 7: Open the top cover and inset the 0.43 mm thickness gauge into the space between the platen and the print head nose. (At this time, never shift the print head. If done it, return to Step 3.) Step 8: Contact the tension gauge to the hole of the thickness gauge and pull it straight to the right. Step 9: Hold the thickness gauge gradually with the print head nose by pressing the below switch.
• Press the Micro Feed (v) switch to increment value by +1.
• Press the Micro Feed (A) switch to decrement the value by -1.
The panel indicates the current BETA3' adjustment value (Refer to Table 4-1.). Step 10: Set the BETA3' value when the tension gauge indicates the 150 (135 - 165) gf, the tension gauge can move to right in a degree. Step 11: After complete BETA3' adjustment, press Pause SW to enter next step. Step 12: Close the print head nose to the platen by pressing the below switch.
• Press the Micro Feed (v) switch to increment value by +1.
• Press the Micro Feed (A) switch to decrement the value by -1
The panel indicates the current BETA2 adjustment value (Refer to Table 4-1.). Step 13: After complete BETA2 adjustment, press Pause SW to enter next step. Step 14: Inset the 0.43 mm thickness gauge into the space between the platen and the print head nose. Step 15: Hold the thickness gauge gradually with the print head nose by pressing the below switch.
• Press the Micro Feed (v) switch to increment value by +1.
• Press the Micro Feed (A) switch to decrement the value by -1.
The panel indicates the current BETA3 adjustment value (Refer to Table 4-1.). Step 16: After complete BETA3 adjustment, press Pause SW to enter next step. Step 17: Inset the 0.80 mm thickness gauge into the space between the platen and the print head nose. Step 18: Hold the thickness gauge gradually with the print head nose by pressing the below switch.
• Press the Micro Feed (v) switch to increment value by +1.
• Press the Micro Feed (A) switch to decrement the value by -1.
The panel indicates the current BETA4 adjustment value (Refer to Table 4-1.). Step 19: After complete BETA4 adjustment, press Pause SW then all of measured BETA values written to the EEPROM, and turn the printer power off. Note: When either the measured BETA values (BETA2, BETA3, and BETA4) are out of range (Refer to Table 4-1.) or the below formula is not satisfied, the printer sounds five beeps and not written the values to the EEPROM.
Formula: A1 = 0.43 / (BETA3 - BETA2) and 0.0134 < A1 < 0.0187
A2 = (0.80 - 0.43) / (BETA4 -BETA3) and 0.0115 < A2 < 0.0195 Step 20: Install the ribbon mask holder and the ribbon cartridge.
Platen
llllllllllllllllll
|
/ |
\ | |||
|
o o | ||||
|
L |
1 | |||
|
I |
mumm | |||
Tension Gauge llllllllllllllllll
Thickness Gauge (BETA3' = 0.43mm)
Figure 4-19. Thickness Gauge Setting Method
|
Beta No. |
Reference Thickness Gauge |
Allowed Value |
Default Value*1) |
|
BETA 3' |
0.43 mm with 150gf pull |
- |
- |
|
BETA 2 |
0.00 mm |
367 - 419 |
408 |
|
BETA 3 |
0.43 mm |
405 - 437 |
435 |
|
BETA 4 |
0.80 mm |
418 - 475 |
461 |
*1: When EEPROM is reset.
*1: When EEPROM is reset.
4.1.8 Measurement Seeking and Bi-directional Printing Adjustment
The purpose of this adjustment is to correct the printer mechanism parameters which control bi-directional printing. Be sure to perform this adjustment when required. If this adjustment is not performed correctly, bidirectional printing may be miss-aligned, or, in the worst case, the carriage might operate incorrectly. Before performing this adjustment, be sure to that the following adjustment are completed correctly.
4.1.2 Carriage Timing Belt Tension Adjustment
4.1.5 Carriage Guide Shaft parallelism Adjustment
4.1.6 Platen Angle Adjustment
4.1.7 Platen Gap Motor Value Adjustment
The parameters to be written to the EEPROM on the C204 Main board in this adjustment are as follows:
1) Measurement seeking
2) Print head flight time adjustment value
3) Bi-directional printing alignment value for each speed mode, Super Draft, Draft, and NLQ
0 If the DIP-SW "3-5" is set to the IBM mode (On), it can not perform the Bi-D adjustment. Therefore, when you perform the Bi-D adjustment, set the DIP-SW"3-5" to Off.
0 When replace the C204 Main board, the ALPHA and BETA values are not written into the memory (In reality, "0" value is installed.) on the Main board. Since this reason, (Since PG is too large) it can not print the each current value to the paper. Due to this, Perform the platen gap value adjustment before perform this adjustment.
The printer prints the test print pattern with the current flight time setting value. Refer to Figure 4-22.
Figure 4-21. Flight Time Adjustment
Flight Time + XXX
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