MiltRap Y-Axis Brace Front Bracket

Description

This Part Replaces The Front And Back Frame Stiffeners Included In The Z Brace Mod. Instead A Thicker Front Bracket And A Threaded Rod Are Used To Provide Better Frame Stiffness, Adding A Front To Back Support In The Middle Of The Relatively Thin Front And Back Frame Panels. The Printed Part, Front Ybrace Bracket, Has 4 Holes For Screws To Secure It To The Panel, They Are 2.5Mm For Taping With An M3 Bottoming Tap, But Can Be Drilled Out For The Screws You Prefer Of Course. The Part Also Has An Indent For A Threaded Rod To Brace The Y Axis Directly Under The Y Belt, And A Vertical Extension To Add Support. Parts List: 1X 16" (Or Longer) 3/8 Threaded Rod 2X 3/8 Nuts 2X 3/8 Id Washers, Need To Be Narrow Outer Diameter To Fit Between Frame Wire Harness Cutout And Y Axis Stepper Motor L Bracket. I Got 22Mm Od And They Just Barely Fit, Something Around 16-18Mm Would Be Ideal Covering The Cutout But Having More Clearance To The Motor Bracket. To Install: Install A Nut And Then A Washer On One End Of The Threaded Rod About 4 Inches Down, Install The 2Nd Washer And The Other Nut At The End Of The Rod. Install The Printed Front Ybrace Bracket On The Front Of You I3 (Replacing The Z Brace Part That Goes There). 3/8" Threaded Rod Fits Through The Cutout For The Wire Harness On The Back Frame Panel That Mounts The Motor And Rails, Move The Wires And Put The Threaded Rod Through That Cutout Until It Rests In The Small Pocket In The Front Ybrace Bracket. It Should Be Under The Belt Pulley Slightly Offset. Check That The Rod Is Not Touching The Y Belt Or The Y Carriage Belt Bracket. A Few Millimeters Clearance Is Fine, Nothing Should Be Moving Around Except The Belt In A Predictable Path. Now Tighten The Inside Nut Outward Against The Back Frame Panel Carefully, Not To Much! The Standard 3/8 Nuts May Slightly Clip The Stepper Motor M3 Cap Screws, But Can Be Tightened By Sliding The Assembly Away From The Stepper Motor Slightly. Tighten The Inside Nut, Turn It So It Moves Outward (Backward, However Your Looking At It) And Pushes On The Back Frame Panel, Until You Have Braced Your Front And Back Plates. Do Not Over Tighten It And Bend Your Panels Outward, Just Turn It Enough To Brace The Panels From Moving Inward. Tighten The Remaining Outside Nut To Hold It All In Place. This Provides A Direct Compression Resistance Member Very Close To The Motor And Pulley, Almost Directly Under The Belt (Offset About 2Mm, But Offset Closer To The Center Of The Frame Due To The Belt Being Slightly Offset). Edited: Replaced Stl With One In Proper Printing Position, Old Version Was Laying Flat In A Poor Position For Printing.

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