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PSC 2000781J MkII MLB Operating Procedure

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2000781J MkII MLB Operating Procedure
Only personnel directly trained and approved by PSC via 3000224 MLB Training Record are authorized to
operate a Lightband for any purpose.
Organization Name
MLB Diameter
MLB Assembly Number &
Revision
MLB Serial Number
Operation Purpose (TVAC,
electrical verification, final
integration, etc.)
Location
This procedure does not involve any high-energy
liquids, solid fuels, or any material with inherently
hazardous physical or chemical properties.
PSC Proprietary
2000781J MkII MLB Operating Procedure
Page 1 of 50

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Summary of Contents for PSC 2000781J MkII MLB

  • Page 1 2000781J MkII MLB Operating Procedure Only personnel directly trained and approved by PSC via 3000224 MLB Training Record are authorized to operate a Lightband for any purpose. Organization Name MLB Diameter MLB Assembly Number & Revision MLB Serial Number Operation Purpose (TVAC, electrical verification, final integration, etc.)

  • Page 2: Table Of Contents

    HORIZONTAL INTEGRATION (OPTIONAL) ..................40 LIGHTBAND ELECTRICAL VERIFICATION ..................42 RECOMMENDED SUPPORT EQUIPMENT ..................44 SETUP PICTURES ..........................45 CAUTION - UNINTENDED ELECTRICAL PATHS ................46 LCT PROCEDURE ..........................47 PSC Proprietary 2000781J MkII MLB Operating Procedure Page 2 of 50...

  • Page 3: Revision History

    37) Figure 17-1: Updated power source symbol. 38) Section 18: Added. 2002159E LCT Procedure subsumed into this doc and simplified. Deleted max allowable LCTs. Allowable LCT mounting torque increased. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 3 of 50...

  • Page 4: Acronyms And Abbreviations

    CG – Center of gravity • Ch - Channel • div – Division (scale on oscilloscope) • Doc – Document (referring to a PSC internal document number) • DOF – Degrees of freedom • DMM – Digital multimeter • ESD – Electrostatic discharge •...

  • Page 5: Introduction

    This document describes the steps required to handle and operate the MKII Motorized Lightband (MLB). Training and certification by Planetary Systems Corp (PSC) are required to operate any Lightband. This can be verified via PSC document 3000224 MLB Training Record, provided at training completion. The Training Record also specifies the certification’s expiration date.
  • Page 6 Figure 3-1: MLB15.000-24, stowed PSC Proprietary 2000781J MkII MLB Operating Procedure Page 6 of 50...
  • Page 7 Figure 3-2: MLB15.000-24, deployed (also referred to as separated) PSC Proprietary 2000781J MkII MLB Operating Procedure Page 7 of 50...
  • Page 8 Figure 3-3: Motor Bracket Assembly, internal view Figure 3-4: Motor Bracket Assembly, external view PSC Proprietary 2000781J MkII MLB Operating Procedure Page 8 of 50...
  • Page 9 Figure 3-5: Motor Bracket Assembly, stowed Figure 3-6: Motor Bracket Assembly operations PSC Proprietary 2000781J MkII MLB Operating Procedure Page 9 of 50...
  • Page 10 Caliper to measure Lightband flange separation (1.3 to 2.1 inch range), or PSC 2002486 MLB Go No Go Stow Gauge b) Go-No go gauge 1) An in-line load cell is highly recommended if using a crane to raise and lower a payload. This allows real-time monitoring of the Lightband’s net Separation Spring force.
  • Page 11 Table 3-5: Preparing to compress (section 12) Item Make & Model Typically Used by PSC Dial torque wrench cable of indicating 1 in∙lb Seekonk SL-6 7/64 inch ball hex key to fit on torque wrench (regular hex end and universal joint may be substituted for ball driver)

  • Page 12: Warnings

    4. Warnings Violating any of the below shall void PSC Document 1001015 MLB Warranty. 1. All technicians completing this procedure shall be trained directly by PSC and given authority to operate their specific Lightband(s) via PSC Document 3000224 MLB Training Record.

  • Page 13: Handling Precautions

    Switches installed. Doing so could damage or contaminate Connector pins, Switch plungers or the Upper Ring flange. See Figure 6-6 Figure 6-1: Do not touch Leaf lip or corresponding groove in Upper Ring. Figure 6-2: Installing fasteners immediately adjacent the MBA PSC Proprietary 2000781J MkII MLB Operating Procedure Page 13 of 50...
  • Page 14 Figure 6-4: Do not touch the gear cover Figure 6-5: Do not touch spring plungers or allow them to contact anything Figure 6-6: Do not allow Upper Ring accessories to contact anything PSC Proprietary 2000781J MkII MLB Operating Procedure Page 14 of 50...

  • Page 15: Lightband Mechanical Attachment Procedure

    -----N/A----- both upper and lower adjoining structures. See Section 15 for helpful equipment. Verify the mating surfaces of both adjoining structures are flat per PSC 7.1.3 Document 2000785 MkII MLB User Manual. Clean the mating surfaces of both adjoining structures and the Lightband 7.1.4...
  • Page 16 Figure 7-1: Pushing Leaf Pin to side to make room for SHC screw (15.000-24 only). Figure 7-2: Inserting a SHC screw between Leaves on Lower Ring. Figure 7-3: SHC screw and washer inserted between Leaves on elevated Lower Ring. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 16 of 50...
  • Page 17 This is especially important if attaching a Ring with the X-axis orthogonal to gravity. PSC temporarily inserts three evenly spaced custom FLH screws or gauge pins through the mounting holes and into the adjoining structure to ensure Ring circularity.

  • Page 18: Stowing The Lightband

    Motor Bracket deploy hard stops. This is required for the Lightband to be compressed. See Figure 8-2. If it cannot, go to Section 12. a) Incorrect position (stowed) b) Correct position (deployed) Figure 8-2: Verifying pre-stow Sliding Tube position. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 18 of 50...
  • Page 19 Lightband motors will not be able to impart the necessary power required to rapidly align the system. Ensure the Lower Ring is on a stable and visually level surface. 8.1.7 PSC Proprietary 2000781J MkII MLB Operating Procedure Page 19 of 50...
  • Page 20 Upper Ring above the Separation Springs to prevent damage due to excess crane movement. For horizontal integration, see Section 13. Figure 8-4: Aligning the Lower and Upper Rings. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 20 of 50...
  • Page 21 Increase force as necessary, up to the maximum allowable per Step 8.1.10, until the Lightband is properly compressed. Figure 8-5: Lightband pre-stow height. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 21 of 50...
  • Page 22 R= V/I. Then repeat, shorting pin 6 to pin 7. Set up the ‘Test Circuit’ portion of the Stow Test Circuit per Figure 8-6 and 8.2.4 connect to the ‘Power and Measurement Circuit’. Figure 8-6: Stow test circuit PSC Proprietary 2000781J MkII MLB Operating Procedure Page 22 of 50...
  • Page 23 Remove the ‘Test Circuit’ from Figure 8-6 and connect the Lightband to the ‘Power and Measurement Circuit’ per Figure 8-7. Do not apply power to the 8.2.10 Lightband. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 23 of 50...
  • Page 24 Figure 8-7: Stow Circuit PSC Proprietary 2000781J MkII MLB Operating Procedure Page 24 of 50...
  • Page 25 Figure 14-1 shows the post-stow state of the switches in the Motor Bracket Assembly. Measure resistance directly at the Lightband's DB-9 socket 8.2.16 connector and complete Table 14-1. See Figure 16-2. Contact PSC if a discrepancy is found. If weights or a fixture were used to compress the Lightband, they may be 8.2.17...
  • Page 26 Figure 8-8: Example stow voltage and current profiles at NTP PSC Proprietary 2000781J MkII MLB Operating Procedure Page 26 of 50...
  • Page 27 Second peak current A/mtr Motors powered duration First peak current A/mtr 38.810-60 Second peak current A/mtr Motors powered duration (1) Use the current channels to determine Motors Powered Duration. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 27 of 50...

  • Page 28: Setting-For-Flight The Lightband

    R= V/I. Then repeat, shorting pin 5 to pin 9. Set up the ‘Test Circuit’ portion of the Set-for-Flight test circuit per Figure 9-1 9.1.4 and connect to the ‘Power and Measurement Circuit’. Figure 9-1: Set-for-Flight test circuit PSC Proprietary 2000781J MkII MLB Operating Procedure Page 28 of 50...
  • Page 29 Remove the ‘Test Circuit’ and connect the Lightband to the ‘Power and 9.1.10 Measurement Circuit’ per Figure 9-2. Do not apply power to the Lightband. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 29 of 50...
  • Page 30 Figure 9-2: Set-for-Flight circuit PSC Proprietary 2000781J MkII MLB Operating Procedure Page 30 of 50...
  • Page 31 Motor Bracket Assembly. Manually cut power if the current limit is reached or the timer relay runs longer than the specified time and contact PSC immediately. A visual inspection of the Lightband may be performed, but do not change configuration.
  • Page 32 Time to initially cut power 1) It is acceptable for one motor to exceed the maximum allowed time to initially cut power. 2) Use the current channels to determine time. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 32 of 50...

  • Page 33: Deploying The Lightband

    R= V/I. Then repeat, shorting pin 5 to pin Set up the ‘Test Circuit’ per Figure 10-1 and connect to the ‘Power and 10.1.4 Measurement Circuit’. Figure 10-1: Deploy test circuit PSC Proprietary 2000781J MkII MLB Operating Procedure Page 33 of 50...
  • Page 34 Upper Ring after the Separation Springs reach end of stroke. 2000843 Deploy Upper Ring Stops or similar shall be used. See Section 15. If using Deploy Upper Ring Stops, follow PSC procedure 3000272 for installation and removal instructions.
  • Page 35 Remove the ‘Test Circuit’ and connect the Lightband to the ‘Power and 10.1.12 Measurement Circuit’ per Figure 10-2. Do not apply power to the Lightband. Figure 10-2: Deploy circuit PSC Proprietary 2000781J MkII MLB Operating Procedure Page 35 of 50...
  • Page 36 Figure 14-1 shows the post-deploy state of the Motor Bracket Assembly 10.1.17 switches. Measure resistance directly at the Lightband's DB-9 connector by completing Table 14-1. See Figure 16-2. Contact PSC if a discrepancy is found. Slowly remove the weight/force on the Upper Ring, allowing the Separation 10.1.18...
  • Page 37 Description Units Motor A Motor B First peak current A/mtr Motor powered duration 0.04 0.10 Motor spin down duration 0.03 0.40 1) Use the current channels to determine duration. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 37 of 50...

  • Page 38: Removing The Lightband From Adjoining Structures

    Remove the Upper Ring from the adjoining structure by reversing step 7.1.8. 11.1.3 Figure 11-1: Removing a SHC screw from the Lower Ring, outer view Figure 11-2: Removing a SHC screw from the Lower Ring, inner view PSC Proprietary 2000781J MkII MLB Operating Procedure Page 38 of 50...

  • Page 39: Preparing The Lightband To Be Compressed

    Bracket as shown in Figure 12-2. Note this will require approximately 35 full revolutions. Return to step 8.1.3. -----N/A----- -----N/A----- 12.1.2 Figure 12-1: Rotating ball screw to allow Sliding Tube travel Figure 12-2: Gap after rotating ball screw PSC Proprietary 2000781J MkII MLB Operating Procedure Page 39 of 50...

  • Page 40: Horizontal Integration (Optional)

    Lightband with Transition Rings, remove the Transition Rings, and -----N/A----- -----N/A----- then bolt the already mated Lightband to the LV and SV. Contact PSC for details. The Lower Ring, mounted to the LV, shall be perpendicular to level within 13.1.2...
  • Page 41 Figure 13-1: Verify Lower Ring is leveled prior to mating SV. Figure 13-2: Be cognizant of translational and rotational alignment and compliance. Figure 13-3: Verify parallelism of compressed Lightband. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 41 of 50...

  • Page 42: Lightband Electrical Verification

    Contact PSC and do not operate the Lightband if any value is out of spec. PSC recommends using a DMM. It will not cause damage to or operate the Lightband. If using a milliohm meter, four wire Kelvin probe system, ensure the test current is <0.01 A to prevent rotating the motors.
  • Page 43 Figure 14-1: Switch state after each Lightband operation PSC Proprietary 2000781J MkII MLB Operating Procedure Page 43 of 50...

  • Page 44: Recommended Support Equipment

    The following is a list of equipment PSC has developed over years of Lightband operation and training. This equipment is not required for proper Lightband operation but is very useful. PSC does not supply any of the items listed below. See PSC’s website to download drawings of these parts.

  • Page 45: Setup Pictures

    16. Setup Pictures Figure 16-1: Example of equipment used to operate Lightband and record voltage and current. Figure 16-2: DMM and DB-9 breakout cable used to measure Motor Bracket Assembly resistance. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 45 of 50...

  • Page 46: Caution - Unintended Electrical Paths

    2. Most oscilloscopes have a common ground. Therefore, all ‘negative’ probes are connected to each other. Consider this when connecting the voltage probes. 3. The user changed the voltage probe connection pins during Set-for-Flight from those recommended by PSC and inadvertently bypassed the limit switches, deploying the Lightband.

  • Page 47: Lct Procedure

    18. LCT Procedure PSC parts 4000637 Lightband Compression Tool (LCT) can be used to compress the Lightband prior to stowing. They are ideal if the satellite weighs less than the total Separation Spring compressive force or during horizontal integration. Note, an LCT consists of a single assembly. Two LCTs, one on the Lower Ring and one on the Upper Ring, are required at each Separation Spring location.
  • Page 48 3/32 inch hex key as shown in Figure 18-2. Torque screws 10 to 12 in∙lb total. Maximum running torque is 8 in∙lb. Ensure each LCT pair is visually aligned as shown in Figure 18-3. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 48 of 50...
  • Page 49 Lightly tighten each cable tie until the flange distance measures 2.00 to 2.05 inch at every LCT. Note: Failure to evenly compress the Lightband increases chance of breaking cable ties. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 49 of 50...
  • Page 50 LCT with a 1/4 inch wrench and remove the screw with a 3/32 inch hex key. See Figure 18-2. Take care not to lose the small washer. Take inventory and ensure all components were removed and accounted for. PSC Proprietary 2000781J MkII MLB Operating Procedure Page 50 of 50...

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