BIXOLON IMPACT PRINTER SRP-270 - Manual (Page 59)

Rev. 3.02 - 59 -
SRP-270
* Ribbon shifting operation
Ribbon shifting action is as follows.
As the Carriage Motor rotates clockwise, Head carriage Assy moves from left to right. When you'd like to
change from red color to black color you should shift Head carriage Assy as shows in figure timing chart.
Delivers to Gear HF-1, and turns to direction of arrow wit Lead Cam.
At this moment, if not energized in Solenoid, Solenoid Lever and Shift cachet are not moved, and so Shift
Cam does not turn, and Ribbon Frame is not in Shift Up/Down.
As Solenoid moves energized, Solenoid lever goes down and turns Shift Cam which snatches with moving
Shift cachet under stop. Shift Cam, along Top/Bottom makes to Shift Up/Down of Ribbon Frame and printing
color is printed by Black/Red. Moving Shifting is up to energization and control of Solenoid.
[ Description of Timing chart.1 ]
14Step(28T) ①
- Head carriage step motor moves left(14step) after covering the home sensor
- The maximum distance of head tip to move left is 18step, so we can make room for moving space of
4step, exactly 1.2696 mm
This area is consisted of 3 region
②
(Accelerating area of left side[30T] + constant speed area[6T] + vertical alignment adjustable time[3T])
400T (printing area, when printing 40 characters of 7×9 font, space between one character and ③
another one is 3T)
421T(printing area + decelerating area of right side[24T]) ④
- Printing area includes part of right side area
24Step ⑤ - Paper feeding area
24T ⑥ - Distance until outing of head pin when printing from right to left
400T ⑦ - Printing area
436T ⑧ - Printing area + decelerating area of right side
The start position of head carria ⑨ ge tip
On uncovering of home sensor ⑩
When outing the first head pin ⑪
When paper is feed ⑫