Hi, My name's Matt, I new to this forum.
I have an electrostatic paper holder from an HP 7035B X-Y Recorder.
It is a bit bigger than a sheet of 8.5x11 paper. and about 1/4in thick. It looks to be mostly made out of metal, and its relatively heavy for it's size.
Its stamped(so faintly I can barely read it):
on the left: G(or C?)-11-10-75
and under that : 11 (i think)
and on the right: 7035 000
It also has 25r written on it in black pen.
Does anyone know anything about these?
I'd like to see if I can get it to hold some paper like it's meant to, but controlled by an Arduino.
I have no Idea what it takes to drive this thing.
I've never dealt with anything like it, I'm not sure what its considered...
UPDATE:
Found the service manual far an HP 7035B X-Y recorder!
This is what they say:
Autogrip power supply is also located on the amplifier printed
circuit board. The power is obtained from the high voltage
secondary winding on the main power transformer T-601 and
the remainder of the supply is composed of resistors R501
through R505, diodes
CR501 through 504, and dual capacitors
C501 and C502. Resistor R501 serves as a current
limiter and
capacitor C501 and C502, as well as diodes
CR501 through
CR504 form a power supply that places a dc voltage between
the grids of the
Autogrip table that is equal to + 380V ± 10%
and -380V ± 10% referenced to ground. Switch S501 is used
to deenergize the
Autogrip. A contact closure in the switch
grounds the input voltage to the
quadrupler rectifier circuit,
causing the dc voltage on the
Autogrip table to go to zero, thus
making the
holddown inoperative.
So I guess I'll build something the the attached circuit.
Thanks!
--Matt
