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TABLE OF CONTENTS

BACKGROUND

There is a problem with a tailor-made shutter control unit: At least one of the four shutters that can be connected, does not work properly. We are sure there is nothing wrong with shutter units as all work normally when attached directly to KSC101 "K-Cube Solenoid Controller".

INSTRUMENTATION

Shutter Unit: ThorLabs mod. SH5 Optical Beam Shutter

SH05	Mod. SH05 Manual Page 4 in SH05 Operating Manual.

Newer units

• SH05R - Optical Beam Shutter with 10' Long Cable, Ø1/2" Aperture, 8-32 Taps
• SH05R/M - Optical Beam Shutter with 10' Long Cable, Ø1/2" Aperture, M4 Taps

Shutter Controller ThorLabs mod. KSC101 "K-Cube Solenoid Controller"

KSC101 K-Cube Solenoid Controller

Mod. KSC101 KSC101 Manual for APT KSC101 Manual for Kinesis Page 39, APT manual Page 23 in Kinesis manual

Shutter Controller: ThorLabs mod SC10 - Optical Beam Shutter Controller

Mod SC10 Optical Beam Shutter Controller

Mod SC10 Optical Beam Shutter Controller Manual (PDF) Page 14 in manual.

INVESTIGATION: SHUTTER SOLENOID CONTROL WAVEFORMS

SH5 Optical Beam Shutter driven directly by KSC101 "K-Cube Solenoid Controller" in manual mode.

• Oscilloscope:
  • Tektronix TDS 2004B, 60 MHz / 1 GS/s
  • S/N: C033097
  • Probe attached to SH5 solenoid control wires (by removing short sections of wire insulation).
• KSC101 configuration:
  • Manual mode (shutter ON/OFF set by scroll wheel).
  • Menu option "select stage": SH5 is the only option, loaded upon start.

Fig A: SH5 Optical Beam Shutter driven directly by KSC101. Shutter controlled by scroll wheel. 15 V applied to SH5 solenoid, and after 275 ms the control signal changes to square wave with duty cycle so RMS value becomes 10.0 V (fig C) -- spot on according to KSC101 specifications (see above) ...!

Fig B: SH5 Optical Beam Shutter driven directly by KSC101. Details of onset of square wave section of control signal. Disregard the "10.2 V mean voltage reading, which is a result of the complete, composite waveform. Fig C shows RMS value of the square wave section itself.

Fig C: SH5 Optical Beam Shutter driven directly by KSC101. One cycle of square wave portion of solenoid control signal. RMS value: 10.0 V -- correct according to KSC101 specifications.

SH5 Optical Beam Shutter driven by GEO Fluid Inclusion Lab control unit

• Oscilloscope:
  • Tektronix TDS 2004B, 60 MHz / 1 GS/s
  • S/N: C033097
  • Probe attached to SH5 solenoid control wires (by removing short sections of wire insulation).
• KSC101 configuration:
  • Manual mode (shutter ON/OFF set by scroll wheel).
  • Menu option "select stage": SH5 is the only option, loaded upon start.
  • ON mode selected.
• GEO Fluid Inclusion Lab control unit:
  • 4 ea SH5 Optical Beam Shutters connected.
  • Each shutter: ON/OFF control using keypads. See setup in fig F.

Fig D: SH5 Optical Beam Shutter driven by GEO Fluid Inclusion Lab control unit. 7 V applied to SH5 solenoid. Signal ON waveform is constant over tide.

Fig E: SH5 Optical Beam Shutter driven by GEO Fluid Inclusion Lab control unit. Start of SH5 solenoid control signal. Initial transients probably casued by relay mechanical effects.

Test setup

Fig F: Test setup. Click to enlarge.

Fig G: Oscilloscope probe attached to SH5 solenoid control wires. Click to enlarge.

DRIVER / SYNCHRONIZING UNIT, TAILOR-MADE - DOCUMENTATION --- Not complete

Item #	Content
1	File: "Puls shaper.docx" -- Click to enlarge.
2	File: "En av 4 out.docx" -- Click to enlarge.
3-A	File: "En av 4.docx" -- A" -- Click to enlarge.
3-B	File: "En av 4.docx" -- B" -- Click to enlarge.
4	There are two PCB copper layout images in this file. Are they different? If so, which one is the current version? File: "En av 4b.docx" -- Click to enlarge.	File: "En av 4b.docx" -- Click to enlarge.
5	File: "liten box--.jpeg" -- Click to enlarge.