Main body

The topmost section forms the main body of the Transformer Mark 3.0. It integrates all the components into a cohesive unit, housing the sequencing reservoir, LED and heat sinks, heaters, temperature sensors, and providing structural integrity to the entire assembly.

Assembled main body with sequencing reservoir inserted


The following 3D printed and/or machined parts are available in our hardware repository .

Light shroud

Main Body (Machined)

Cam Ring (Machined)

Locking Ring with standoffs.

4x LED heat sink assemblies:

  • Two with UV LED for cleaving
  • One with the red and orange LEDs
  • One with the green and blue LEDs

Please note that the pictured assembly is for illustration purposes only. It is from a previous iteration and is not fully representative of a correctly assembled heatsink.

4x Heat Sink Height Adjuster (Machined)

Reservoir insert plate

Quantity Description McMaster Part Number Use
2x 18-8 Stainless Steel Narrow Cheese Head Slotted Screws 97710A113 Attaching the light shroud to the bottom of the main body.
2x Super-Corrosion-Resistant 316 Stainless Steel Socket Head Screw 92290A320 Attach the main body to two of the aluminum legs of the assembly.
1x Passivated 18-8 Stainless Steel Phillips Flat Head Screw 92010A424 Attach the main body to one of the aluminum legs of the assembly.
8x Alloy Steel Socket Head Screw 91290A010 Attach the heat sink height adjusters to the main body.
8x Stainless Steel Flat-Tip Set Screw 92605A024 Set screw to set the max height of the heat sink bearing.
4x 18-8 Stainless Steel Dowel Pin 91585A368 Dowel for heat sink bearing.
4x Stainless Steel Ball Bearing 7804K124 Bearing setting maximum height of heat sink.
4x 18-8 Stainless Steel Hex Drive Flat Head Screw 92125A126 Attach the Reservoir Insert plate to the main body.
4x 18-8 Stainless Steel Shoulder Screw 90265A323 Shoulder screw used to attach Locking ring with standoffs to be attached to the Cam ring.
4x Compression Spring 9657K604 Compression spring for shoulder screws.


We start by attaching the light shroud (note the orientation of the shroud with respect to the three legs) to the main body using two narrow cheese head slotted screws (97710A113).  We then attach the main body to the rest of the assembly via two socket head screws (92290A320) and one Phillips flat head screw (92010A424).  Note: Carefully align the light shroud with the optical stack when positioning the main body on the assembly.

Attach the 4 heat sink height adjusters with 8 socket head screws (91290A010) to the main body.  Start with the height adjusters placed in the middle of the extreme positions.  The heat sink is raised by moving the adjuster closer towards the center of the main body and lowered by moving the adjuster further away from the center. When placing each of the 4 LED heat sink assemblies, gauge the alignment of the LEDs with the glass substrate in an assembled reservoir and adjust so that the LEDs are centered around the glass substrate.  The assembly of the LED heat sinks is described here.

The next step is a little tricky.  The cam ring needs to be placed onto the main body such that the heat sink pins are riding in the inner grove (see image below). If one of the pins rides in the outer grove the heat sink will not actuate properly.

Next we have to assemble the reservoir insert plate.  Place one dowel pin (91585A368) in each of the 4 bearings (7804K124) and press them into the bottom slots of the reservoir insert plate.

Insert the 8 set screws (92605A024) halfway into the holes such that the bearings can freely move up and down in the space provided (see image below):

Once the Reservoir Insert plate has been attached to the main body using 4 flat head screws (92125A126) the set screws are adjusted until the pin from the heat sink no longer has “wiggle room”.  Note that it is quite easy to overtighten the set screws so carefully adjust both screws in ¼ turn increments until the pin from the heat sink no longer moves freely.

Finally, the Locking Ring with standoffs is installed with 4 shoulder screws (90265A323) and 4 compression springs (9657K604).  Turning the cam ring to the open position allows the insertion of a reservoir and once turned to the closed position pivots the LED heat sinks such that the pins set the distance of the LED to the edge of the substrate surface and locks the reservoir into position.