CARITO SMALL GRID POWER FRAME STANDARD v1.0
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Document: SG_Power_Frame_Standard.txt
Status: Grid Specification / Non-Negotiable
Applies To: All Small Grid Power Frames installed within SG-MMF cages

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1. PURPOSE
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This document defines the physical interface, alignment rules, and installation
requirements for all Small Grid (SG) Power Frames.

The standard ensures that Power Frames built by different shops remain
interchangeable within the SG-MMF cage.

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2. ROLE OF THE POWER FRAME
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A Small Grid Power Frame:
- Carries a specific power system
- Interfaces with the SG-MMF cage
- Aligns the power source to the Power Output Plane
- Allows removal or replacement without chassis modification

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3. ENVELOPE REQUIREMENT
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All SG Power Frames must fit entirely within the SG-SPV envelope
as defined in SG_SPV_Spec.

No Power Frame component may protrude beyond the SG-SPV.

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4. POWER FRAME BASE PLANE
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The Power Frame Base Plane (PFBP):
- Is parallel to the Chassis Interface Plane
- Serves as the primary mounting surface
- Must remain flat and square

The PFBP must not redefine the MMF cage geometry.

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5. INTERFACE RAILS AND HARDPOINTS
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The SG-MMF cage defines standard interface rails.

Power Frames must:
- Attach to these rails
- Use standardized hole spacing or clamp zones
- Allow fore/aft adjustment within permitted range

Engine-specific mounts belong to the Power Frame,
not the MMF cage.

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6. ALIGNMENT TO POWER OUTPUT PLANE
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Power Frames must align the power source output shaft,
sprocket, or coupling to the SG Power Output Plane.

Alignment may be achieved using:
- Adjustable slots
- Shims and spacers
- Intermediate adapter plates

Misalignment beyond tolerance requires redesign.

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7. FLOATING AND ADJUSTMENT
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Power Frames may float within the allowed SG-SPV adjustment range.

Permitted adjustment limits:
- Fore/Aft: +/- 1.5 inches
- Left/Right: +/- 1.0 inch
- Vertical: +/- 1.0 inch

Permanent offset beyond this range is prohibited.

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8. LOCK-IN METHODS
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Approved lock-in methods include:
- Bolted connections
- Clamp systems
- Welded tabs in approved lock zones

Welded tabs must be removable or sacrificial.

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9. SERVICEABILITY
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Power Frames must allow:
- Removal of the entire frame as a unit
- Access to common service points
- Reasonable disassembly without special tools

Tool-less clamps are permitted but not required.

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10. ELECTRICAL AND UTILITY ROUTING
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Power Frames may include:
- Cable trays
- Hose guides
- Utility mounts

Routing must not block:
- Service Access Zones
- Cooling paths
- Removal paths

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11. VIBRATION AND ISOLATION
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Isolation mounts may be integrated into Power Frames.

Isolation must:
- Preserve alignment
- Avoid excessive movement
- Not transfer load into the MMF cage improperly

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12. IDENTIFICATION AND LABELING
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Each SG Power Frame must:
- Carry a permanent serial identifier
- Declare compatibility class
- Declare supported power configuration

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13. COMPLIANCE
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Any Power Frame that:
- Alters MMF geometry
- Exceeds SG-SPV limits
- Obstructs service access

is non-compliant and must be reclassified.

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14. AMENDMENTS
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Changes to this standard require:
- Version increment
- Change log entry
- Platform justification

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END OF SG POWER FRAME STANDARD
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