Adjusting The Pen Servo - GRAPHTEC Cutting PRO FC2230 Series Service Manual

7.10 Adjusting the Pen Servo

1-pen models
Set Bits 4,5, and 6 to OFF
(4) In the case of a 2-pen model
Use a 2-channel oscilloscope to monitor the waveform of TP2 and TP3 on the Main Joint
Board in the control box. Adjust trimmers VR7 and VR8 so that TP2 and TP3 have the
same span and zero position when the pen 1 and pen 2 holders are simultaneously
pressed down and then released. Do not mount any pens in the holders.
Use VR7 to adjust the levels at the up position, and VR8 to adjust the levels at the down
position. Repeat the operations several times until the up and down levels are the same.
If you can not get the pen 1 waveform to match the pen 2 waveform, adjust the position of
the pen 1 magnet by bending it slightly to one side so as to adjust its position relative to the
Hall element sensor.
(5) When adjustment is completed, return the DIP switch to its default settings and turn off the
plotter.
FC2230-UM251-01-1600
ＰＥＮ ＨＥＩＧＨＴ
ＰＥＮ ＦＯＲＣＥ
ＰＥＮ ＨＥＩＧＨＴ
2-pen models
Set Bits 2,4,5, and 6 to OFF
ＰＡＲＡＬＬＥＬ
7-12