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SECTION 4
ADJUSTMENTS
AstroJet 2600P/2650P/2800P Print Speed Adjustment
REQUIREMENT: To provide the proper speed of the printer at each of the print quality
ADJUSTMENT:
1. With the printer connected to the computer,
remove the left-hand, right-hand rear covers,
and the rear panel. Turn the printer ON.
2. Set the potentiometers R1 [1], R7 [2], R11 [3]
and R14 [4] on the Interface PC Board, to their
center or middle positions.
3. The CURRENT LIMIT [5], DECL [9], and
ACCEL [10] potentiometers on the Speed
Control PC Board P/N 123-1405 (MMXL05) or
P/N 123-1651 (MMXL02) are pre set at the
factory and should not require adjustment.
There is an arrowhead on the adjustment slot of
the potentiometers to indicate direction.
⇑
⇐
5
9
The IRCOMP pot [8] is set at a different angle
depending on the PC Board model. If the motor
does not maintain set speed as the load changes,
gradually adjust the IR COMP pot clockwise. If the
motor oscillates, the IR COMP pot may be set too
high.
Turn it counterclockwise to stabilize the
drive.
4. Hook up a frequency meter to GND and SIG 1
(Encoder) test point on Main Processor PCB.
Open a job and click on File, then Print. In the
Properties window select Features and then
select 150DPI and High speed. Click Apply,
then OK. Then click OK to start the printer.
INTERFACE PC BOARD
28
settings.
⇐
10
5. Set the Hi-Speed pot. (R14) [4] on the
Interface PC Board to its middle position and
adjust the MAX SPD [5] potentiometer on the
Speed Control PC Board until the frequency
reads 40KHz.
6. Then adjust R14 [4] to obtain a frequency of
48.0KHz (80 ips). Feed one piece of media.
7. Restart the job above, but set the speed at
Medium High and adjust R11 [3] to obtain a
frequency of 36.0KHz (60 ips).
8. Repeat Step 7 again, but set the speed at
Medium and adjust R7 [2] to obtain a
frequency of 27.0KHz (45 ips).
9. Repeat Step 7 again, but set the speed at Low
and adjust R1 [1] to obtain a frequency of
13.2KHz (22 ips). Then exit the CONTROL
PANEL software and turn OFF the printer.
10. Apply lacquer such as nail polish to the nine
potentiometers to prevent movement of the
adjustments and replace the covers.
SPEED CONTROL PC BOARD
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