pt3 brake replacement procedure

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PT3 Brake

Replacement

Procedure

Document No.: TR10593 Revision: 1.0 Date December 12, 2012

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8030 Bracken Pl SE

Snoqualmie, WA 98065

www.triextech.com

Revision History

Revision Version Date Author Description 1.0 12/11/2012 J. Maier Created document

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Approvals

Jeff Maier Date

Tim Wright Date

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Table of Contents 1 Purpose ................................................................................................................................................. 7

2 Required Tools ...................................................................................................................................... 7

2.1 T handle 3mm Allen wrench at least 190mm long: ...................................................................... 7

2.2 Standard 2.5mm Allen wrench: .................................................................................................... 8

2.3 3mm Allen wrench shortened to 50mm: ...................................................................................... 8

3 Setup ..................................................................................................................................................... 9

3.1 Place the PT3 on a large enough surface so that it may be turned around for access to front

and rear with no obstructions. ................................................................................................................. 9

3.2 Place a sheet of cardboard or other protective material over the DUT platform to prevent

scratches. .................................................................................................................................................. 9

4 Disassembly ........................................................................................................................................... 9

4.1 Z Axis Spring Assembly Removal ................................................................................................... 9

4.1.1 The carriage tower with the Z axis spring assembly appears as follows: ............................. 9

4.1.2 Begin by removing the Z axis locking wheel: ...................................................................... 10

4.1.3 Remove the screw in handle on the side of the carriage tower that the brake is on

(opposite the side with the Z axis spring). .......................................................................................... 10

4.1.4 Remove the 3mm cap screw holding the Z axis spring down: ............................................ 11

4.1.5 Grasp the end of the spring; be careful to not let the spring roll up uncontrollably when

the screw is removed. ......................................................................................................................... 11

4.1.6 Allow the spring to roll itself up onto the reel: ................................................................... 12

4.1.7 The spring assembly should now appear as follows: .......................................................... 12

4.1.8 Loosen two of the 4 screws holding the spring roll and white roller down. It is not

necessary to take them out; loosening them makes the spring assembly easier to remove: ........... 13

4.1.9 Using a 3mm Allen wrench, remove the 4 screws holding the spring assembly in place: . 13

4.1.10 Pull out and remove the spring assembly: .......................................................................... 14

4.2 Carriage Tower Removal ............................................................................................................. 16

4.2.1 Begin by removing the 8 2.5mm Allen cap screws holding the carriage tower to the slides:

16

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4.2.2 Before removing the last screw, have a second person support the carriage tower to

prevent it from falling after the last screw is removed. ..................................................................... 17

4.2.3 Carefully place the carriage tower on the circular table below, covered in protective

material per section 3.2: ..................................................................................................................... 17

4.2.4 Tilt the carriage assembly to remove it from the slide rails: .............................................. 18

4.3 Carriage Tower Disassembly ....................................................................................................... 19

4.3.1 Begin by removing the 4 3mm Allen cap screws which connect the top portion of the

carriage to the lower: .......................................................................................................................... 19

4.3.2 The top and bottom sections of the carriage are now free to slide vertically: .................. 21

4.4 Brake Removal ............................................................................................................................ 22

4.4.1 Insert the shortened 3mm Allen wrench into the access hole under the brake as shown:22

4.4.2 Loosen the screw until the brake assembly is free: ............................................................ 23

4.4.3 Remove the brake: .............................................................................................................. 24

5 Brake Replacement ............................................................................................................................. 25

5.1.1 A new brake assembly appears as follows: ......................................................................... 25

5.1.2 Insert the shortened 3mm Allen wrench in the access hole as before and push the screw

up: 26

5.1.3 Place the new brake as shown and tighten the screw: ...................................................... 27

6 Reassembly ......................................................................................................................................... 28

6.1 Carriage Tower Reassembly ........................................................................................................ 28

6.1.1 Orient the upper and lower sections of the carriage tower so that the 180˚ mark on the

lower section is lined up with the upper section side opposite the side with the brake assembly: .. 28

6.1.2 Lower the top assembly while lining up one of the 4 screws and hole: ............................. 28

6.1.3 Tighten all 4 screws: ............................................................................................................ 29

6.2 Carriage Tower Reattachment to Frame .................................................................................... 30

6.2.1 Slide the carriage tower under the frame and set upright. Make sure and place the side

with the brake oriented towards the open side of the frame (front): ............................................... 30

6.2.2 Raise the carriage tower and align it with the 4 slides. Have a second person hold the

tower in place. Start 4 of the 8 screws by hand to hold the tower in place. Insert the remaining 4

screws, and tighten all 8: .................................................................................................................... 31

6.3 Z Axis Spring Reassembly ............................................................................................................ 32

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6.3.1 Slide the Z axis spring assembly into place: ........................................................................ 32

6.3.2 Insert and tighten the 4 screws which hold the assembly in place: ................................... 32

6.3.3 Tighten the screws holding the spring and white rollers in place; these were loosened in

step 4.1.8............................................................................................................................................. 33

6.3.4 Guide the spring over the white roller, insert the screw, and reattach to the block on the Z

axis shaft: ............................................................................................................................................ 33

6.4 Handle Reattachment ................................................................................................................. 36

6.4.1 Thread in both the Z axis locking wheel and the handle removed previously: .................. 36

7 Final Check .......................................................................................................................................... 38

7.1 The vertical carriage rotates freely. ............................................................................................ 38

7.2 The red handle on top moves the Z axis smoothly up and down and that the Z axis spring rolls

and unrolls smoothly. ............................................................................................................................. 38

7.3 The vertical carriage slides freely along the frame. .................................................................... 38

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1 Purpose To provide a procedure for replacing the vertical shaft brake assembly.

2 Required Tools

2.1 T handle 3mm Allen wrench at least 190mm long:

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8030 Bracken Pl SE


www.triextech.com

2.2 Standard 2.5mm Allen wrench:

2.3 3mm Allen wrench shortened to 50mm:

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8030 Bracken Pl SE


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3 Setup 3.1 Place the PT3 on a large enough surface so that it may be turned around for access to front and

rear with no obstructions.

3.2 Place a sheet of cardboard or other protective material over the DUT platform to prevent

scratches.

4 Disassembly

4.1 Z Axis Spring Assembly Removal

4.1.1 The carriage tower with the Z axis spring assembly appears as follows:

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4.1.2 Begin by removing the Z axis locking wheel:

4.1.3 Remove the screw in handle on the side of the carriage tower that the brake is on (opposite the

side with the Z axis spring).

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4.1.4 Remove the 3mm cap screw holding the Z axis spring down:

4.1.5 Grasp the end of the spring; be careful to not let the spring roll up uncontrollably when the

screw is removed.

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4.1.6 Allow the spring to roll itself up onto the reel:

4.1.7 The spring assembly should now appear as follows:

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4.1.8 Loosen two of the 4 screws holding the spring roll and white roller down. It is not necessary to

take them out; loosening them makes the spring assembly easier to remove:

4.1.9 Using a 3mm Allen wrench, remove the 4 screws holding the spring assembly in place:

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4.1.10 Pull out and remove the spring assembly:

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4.2 Carriage Tower Removal

4.2.1 Begin by removing the 8 2.5mm Allen cap screws holding the carriage tower to the slides:

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4.2.2 Before removing the last screw, have a second person support the carriage tower to prevent it

from falling after the last screw is removed.

4.2.3 Carefully place the carriage tower on the circular table below, covered in protective material per

section 3.2:

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4.2.4 Tilt the carriage assembly to remove it from the slide rails:

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4.3 Carriage Tower Disassembly

4.3.1 Begin by removing the 4 3mm Allen cap screws which connect the top portion of the carriage to

the lower:

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4.3.2 The top and bottom sections of the carriage are now free to slide vertically:

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4.4 Brake Removal

4.4.1 Insert the shortened 3mm Allen wrench into the access hole under the brake as shown:

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4.4.2 Loosen the screw until the brake assembly is free:

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4.4.3 Remove the brake:

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5 Brake Replacement

5.1.1 A new brake assembly appears as follows:

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5.1.2 Insert the shortened 3mm Allen wrench in the access hole as before and push the screw up:

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5.1.3 Place the new brake as shown and tighten the screw:

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6 Reassembly

6.1 Carriage Tower Reassembly

6.1.1 Orient the upper and lower sections of the carriage tower so that the 180˚ mark on the lower

section is lined up with the upper section side opposite the side with the brake assembly:

6.1.2 Lower the top assembly while lining up one of the 4 screws and hole:

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6.1.3 Tighten all 4 screws:

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6.2 Carriage Tower Reattachment to Frame

6.2.1 Slide the carriage tower under the frame and set upright. Make sure and place the side with the

brake oriented towards the open side of the frame (front):

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6.2.2 Raise the carriage tower and align it with the 4 slides. Have a second person hold the tower in

place. Start 4 of the 8 screws by hand to hold the tower in place. Insert the remaining 4 screws,

and tighten all 8:

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6.3 Z Axis Spring Reassembly

6.3.1 Slide the Z axis spring assembly into place:

6.3.2 Insert and tighten the 4 screws which hold the assembly in place:

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6.3.3 Tighten the screws holding the spring and white rollers in place; these were loosened in step

4.1.8.

6.3.4 Guide the spring over the white roller, insert the screw, and reattach to the block on the Z axis

shaft:

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6.4 Handle Reattachment

6.4.1 Thread in both the Z axis locking wheel and the handle removed previously:

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7 Final Check Verify the following:

7.1 The vertical carriage rotates freely.

7.2 The red handle on top moves the Z axis smoothly up and down and that the Z axis spring rolls

and unrolls smoothly.

7.3 The vertical carriage slides freely along the frame.

pt3 brake replacement procedure

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