Linear Positioning System Specifications.pdf

1. Purpose

The Linear Positioning System (LPS) will be used in a radiation calibration laboratory to accurately position radiation survey instruments and dosimetry devices at known distances and vertical alignments relative to a radiation source. The system must enable precise, repeatable motion along the beam axis and vertical translation to align instruments at the beam centerline.

2. System Overview & Functional Requirements

a. Axes of Motion

i. X-Axis (beam axis):

Minimum linear travel: 9 meters

Function: Adjust distance between radiation source and target

Positioning accuracy: 1 mm

Automation: Stepper-motor driven

User interface for:

o Commanded position entry o Display of actual position o Instrument Offset capability to compensate for instruments not centered on the platform

ii. Z-Axis (vertical positioning):

Minimum travel: 30 cm below the beam centerline

Function: Vertical alignment of instrument at beam centerline

Positioning accuracy: 1 mm

Stepper-motor driven and fully automated

User interface identical in capability to X-axis

3. Instrument Platform Requirements

a. Platform size: 50 cm × 50 cm

b. Surface: 1 cm grid engraving for visual alignment

c. Mechanical interface:

i. Holes drilled and tapped at 10 cm intervals

ii. Must allow jigs and fixtures to be bolted and reproducibly placed

iii. Load capacity: ≥100 lbs, with no measurable deflection under full load

iv. Platform must allow stable, repeatable mounting of multiple instrument form factors

4. Irradiator Stand Requirements

a. A fixed stand or table must be installed at one end of the LPS to support the agency’s portable, manually operated irradiators

b. Load capacity: ≥250 lbs

c. Height: Beam line located 1.0-1.5 meters above finished floor

d. Stand must include holes drilled and tapped at locations appropriate for securely mounting and accurately aligning irradiators along the X-axis

e. Additional irradiator specifications for bolt pattern and alignment features are found at the end of this document. Drawings include the following:

i. IDNS Cradle Drawing: This support cradle is used to seat the IDNS Irradiator on the stand. The cradle will sit directly on the stand, such that the irradiator shutter can be swung open.

ii. IDNS Irradiator: The IDNS irradiator weighs approximately 200 lbs and sits horizontally on the cradle.

iii. JLS Irradiator: The JLS irradiator weighs approximately 60 lbs and sits directly on the stand.

5. Controls & Interface

a. Graphical or digital user interface capable of:

i. Selecting desired X and Z axis positions

ii. Displaying real-time actual positions with 1 mm resolution

iii. Setting and applying X-axis Instrument Offset values

iv. Interface must be console-mounted, or PC-based

v. Motion control must prevent overshooting and provide smooth, repeatable travel

vi. Limit switches, homing functions, and safety interlocks must be included

6. Accuracy & Performance

a. Linear positioning accuracy: 1 mm (both axes)

b. Repeatability: 1 mm or better

c. Environmental: Suitable for indoor laboratory use near radiation fields

7. Structural & Mechanical Requirements

a. Mechanically rigid construction ensuring minimal vibration and sag along X-axis under dynamic motion

b. Materials chosen to minimize long-term warping or drift

c. Cable management must allow full X-axis travel without binding or obstruction

d. All tapped holes must be provided with standard thread specification (M6x1.0)

8. Documentation & Deliverables

a. Mechanical drawings and dimensional specifications

b. Operation and maintenance manual

c. Recommended spare parts list

d. Items a, b and c are to be provided when the equipment is delivered

9. Installation

a. Vendor shall ship or transport all components and any tools or equipment necessary for installation to 1301 Knotts Street, Springfield, IL 62703

b. Components must be able to pass through a 48-inch nominal doorway prior to installation

c. Vendor shall perform onsite installation and acceptance testing

d. All equipment must be received and installed by June 30, 2027.

e. All equipment must come with the standard manufacturer’s warranty and be transferable to IEMA-OHS.

PROJECT

TITLE

DRAWN

CHECKED

APPROVED

SCALE WEIGHT SHEET

DWG NO REVCODESIZE

1/3N/A1:210/6/2026T. Hendrickson

10/6/2026TRH B AN/A

10/6/2026TRH

IEMA-OHS Calibration Lab

Pig Cradle

2.00

10.25

0.50

1.98 8.28

0.25

4.50

1.507.25

5.00

0.25 4.50

0.50

1.00

2.00

1.00 2X 0.26 SLOT THRU

PARTS LIST

ITEM QTY PART NUMBER MATERIAL

1 2 PIG CRADLE 1 ALUMINUM

2 2 PIG CRADLE 2 ALUMINUM

0.50

4X Ø0.27 THRU

8X Ø0.27 THRU

Ø0.44 0.25

8X Ø0.2014 1.00

1/4-20 UNC - 3B

DRAWN

CHECKED

APPROVED

SCALE WEIGHT SHEET

DWG NO REVCODESIZE

2/3N/A1:210/6/2026T Hendrickson

10/6/2026TRH B AN/A

10/6/02026TRH

IEMA-OHS Calibration Lab

Pig Cradle 1

9.25

1.48

7.78

0.25

0.50

1.00

2X Ø0.2014 1.00

1/4-20 UNC - 3B

2X Ø0.2014 1.00

1/4-20 UNC - 3B

0.25

0.50

1.00

0.25

1.00 7.25

0.50

2X Ø0.27 THRU

Material: Aluminum

DRAWN

CHECKED

APPROVED

SCALE WEIGHT SHEET

DWG NO REVCODESIZE

3/3N/A1:210/6/2026T Hendrickson

10/6/2026TRH B AN/A

10/6/2026TRH

IEMA-OHS Calibration Lab

Pig Cradle 2

0.50

2.00

5.00

0.25 4.50

0.50

1.00

2.00 1.00 0.26 SLOT THRU

4X Ø0.27 THRU

Ø0.44 0.25

Material: Aluminum

DRAWN

CHECKED

APPROVED

SCALE WEIGHT SHEET

DWG NO REVCODESIZE

1/1N/A1:210/13/2026T Hendrickson

10/13/2026RH B AN/A

10/13/2026TRH

IEMA-OHS Calibration Lab

Lead Pig

Ø8.00

Ø0.50

1.00 2.00

8.13

3.25

DRAWN

CHECKED

APPROVED

SCALE WEIGHT SHEET

DWG NO REVCODESIZE

1/1N/A1:210/13/2026T Hendrickson

10/13/2026TRH B AN/A

10/13/2026TRH

IEMA-OHS Calibration Lab

Pig

3.25

5.00

4.25

4X Ø0.27 0.13

5.88

6.00