Right Angle Track Saw Guide for Milescraft Track Saw

Although there are many right angle guides for common (and more expensive!) track saw tracks (like Festool, Makita, Wen, Powertec, etc.), I wanted a right angle guide for the more inexpensive Milescraft track saw track and didn't see any available.

FEATURES

- Perfectly Square - Though it prints very square, you can use the built-in nut slot and bolt holes to insert locking or non-locking nuts and ¼-20 bolts to fine-tune squareness or attach a secondary fence. Small holes on the underside of the nut slots allow you to use a hex key or allen wrench to push inserted nuts out if you change your mind. 

- Precise and Tunable - The design pulls the t-track tight against the guide surface when you engage the latches, allowing for reliable, repeatable, predictably square cuts. For those wanting extreme precision, integrated nut and bolt holes allow for “set-it-and-forget-it” squareness after tuning

- Clamp-able - Integrated t-track clamp slot allows you to use the Milescraft t-track clamps to secure the track to your workpiece while using the right angle guide

- Easy to Print - Fits on MK4/MK3 build plate. Prints vertically using default support settings

- Easy to Adjust - Includes well-thought-out features like screwdriver holes to adjust Philips head bolts, sliding slots to allow for tight-fitting latches, and integrated room to use hex wrenches

- Sturdy - Thick support members and reinforced structure keep it rigid and square. 

INCLUDED FILES

I've included .3mf and .obj files as well as a .stp file that you should be able to edit in CAD software (e.g., Fusion360). I've also included a PrusaSlicer project file that includes proper orientation, support settings, etc. Finally, I've included a “Looser Tolerances” version where the parts that insert into the t-track are a bit looser in case your printer likes that one better.

PRINTER SETTINGS

See included PrusaSlicer project file for details

- Printed in PETG with “Prusament PETG” default
- 0.2mm layer height, Structural preset
- I printed with 50% infill and 4 perimeters for extra strength and rigidity, though this may be overkill
- Supports enabled, default PrusaSlicer support settings with painted-on supports
- I recommend printing it vertically (with square reference surface touching the build plate) to enable precise fit for the elements that fit inside the t-track slots
- You will need to rotate the part about 45-50 degrees to fit on an MK4/MK3 bed
- 50 degree infill angle makes for clean infill and skin

ASSEMBLY

- Remove printed supports
- Attach draw latches (I used these from Amazon) using M4x20mm screws, washers, and nuts, though you can likely fit M4x25mm screws for more breathing room (You can use this without the latches, though it works much better with them). Slide the M4 bolts upside-down through the bottom so the tip pokes up through the top. Insert the M4 screw tip into the hole on the latch base and tighten a nut against the base of the latch using pliers to hold the nut and a 3mm allen key to tighten the M4 screw.
- Slide draw latches back and forth in slot to ensure tight fit when locking the latch to the t-track, and tighten all hardware

To fine-tune squareness:
- Insert ¼-20 lock nuts or regular nuts in forward slots (I recommend lock nuts to prevent bolts from moving over time)
- Insert ¼-20 bolts (either hex head or Philips head) and tighten/loosen the bolts to fine-tune squareness 
- Note you can insert the nuts and bolts so that either the head or the tip of the bolt protrudes forward, depending on how you want to set it up
- You can also use this feature to attach a secondary “fence” (such as a piece of scrap plywood or hardwood) to make a longer reference surface
- Integrated screwdriver holes allow you to adjust the bolts if you use a Philips head bolt
- A small hole on the underside (below the nut slot) allows you to use a small hex key/allen wrench to push the nut out if you change your mind