PrintBone small - 7 inch bell trombone

Description

The Printbone, A 3D Printed Trombone. Now In 7 Inch Bell Version With 12Mm Bore Slide. Designed With The Help Of Acoustic Modelling Software. Comes With Carbon Fiber Slide, Complete With Pla Stockings. Also Available In Large Bore Version At Https://Www.Thingiverse.Com/Thing:2252952 It Plays Like A Nice And Bright Small Bore Trombone. It Doesn'T Play As Loud As Some 8 Inch Bell/.500 Inch Slide Brass Trombones, But It'S Bright Enough To Be Heard Without Playing Too Loud. It Plays In Tune With The Included Slide. I'Ve Gotten The Slide Action To Be Ok, But Not Great. Brass Bushings Instead Of Pla Stockings Will Greatly Improve Slide Action. With The Pla Stockings, Use Trombone Slide Cream, Not Slide-O-Mix Or Yamaha Slide Lubricant - They Will Not Work Well. The Outer Slide Is Very Light And Can Be Used As A Bach 42 Outer Slide. Measured To The Width Of My Bach 42 Slide, It May Be Different On Yours. If You'Ve Only Used Brass Slide, You'Ll Be Surprised. At Under 100 Grams, The Slide Action Is Simply Amazing If You Get It Aligned Well. Fits A Conn 48H/6H/Director Slide And Bell. With A Conn 48H Slide, The Third Partial (F In First Position) Plays A Bit Higher Than In Most Trombones. This May Take Some Getting Used To. What You Need: - A 3D-Printer With An At Least 18X18Cm Print Bed, 20Cm High - 2X 15Mm Id/16Mm Od Carbon Fiber Tubes, About 70-75Cm - 2X 12Mm Id/14Mm Od Carbon Fiber Tubes, About 70-75Cm - About Half A Roll Of Pla - Cyanoacrylate Glue, Eg Super Glue - Sandpaper, I Used 150, 320 And 600 Grit - Trombone Slide Cream (Not Slide-O-Mix Or Yamaha Lubricant) - Tuning Slide Grease - A Small Shank Mouthpiece - Metal, Plastic Or 3D Printed Should Cost About €70-100 In Materials, Mainly Due To The High Cost Of Carbon Fiber Tubes. I Used Http://Www.S2-Carbon.Com/Rohre/Glaenzend/17/Carbon-Rohr-16-X-15-X-1000-Mm-Glanz?C=9 For The Outer Tubes And Https://Hobbyking.Com/En_Us/Carbon-Fiber-Tube-Hollow-14X750Mm.Html For The Inner Tubes. The Hobbyking Inners Are Incorrectly Listed As 14X13, But Are Actually 14X12Mm, As I Found Out After Receiving Them. If They Happen To Be 14X13, That Will Work, Although You Might Want A Larger Leadpipe In That Case. ### Printing The Bell Print Parts Of Bell. The Bell Flare Will Need Support, And The Part That Includes The Slide Receiver As Well. The Other Parts Do Not Require Support. Use At Least 40% Infill For The Bracing, More Means A Stiffer Trombone And It Should Still Be Very Light. ### Assembling The Bell Find All Leaks By Using A Brush With Dishwashing Detergent. Seal One End Of Each Part, Then Blow In The Other End - If There Are Bubbles There'S A Leak! Fix With Some Glue. Sand The Connectors So They Fit Smoothly Together. Now Sand The Tuning Slide Until It Fits Into The Trombone. Do Not Force It, The Tuning Slide Pegs Are Quite Fragile. When It Fits, Apply Tuning Slide Grease - It Will Slide In Much Easier And It Will Make An Airtight Seal. Now Glue The Bell Section Together. Start By Applying Glue To The Inside Of The Top Brace. Hold Top Part Of Neckpipe Plus Top Part Of Bell Together. Now Insert The Tuning Slide And Wait Until The Glued Is Dried A Little. Now Practice Putting The Next Two Parts Together On The Trombone Without Glue. Then Apply Glue On The Inside Of The Bottom Brace, And The Top Joints Of Both The Neckpipe Bottom Part And Middle Bell Part. Apply A Thin Layer Of Glue To The Outside And Inside All Around To Ensure An Airtight Seal, Or It Will Leak. Now Glue The Two Parts At The Same Time To The Already Assembled Part. Having Someone Else Hold The Top Part Can Be Useful Here, But It Can Be Done With Just Two Hands. Glue The Bell Flare By Applying Glue On The Connector - Again, Thing Layer Of Glue On The Inside And Outside Of The Connector! ### Printing The Slide Print Parts Of The Slide. Use 50-100% Infill On The Handgrips For Extra Stiffness, Especially On The Inner Slide Grip. You Should Need Support For The Inner Slide Grip Only. Print The Leadpipe Standing Upright. Check All Parts For Leaks Again And Fix Or Reprint At Slower Speed. The Parts Are Matched To The Specific Tubes I Ordered, So They Might Not Fit Your Tubes. In That Case, Go To Http://Github.Com/Pieterbos/Printbone And Fit To Your Own Tubes With Openscad. ### Assembling The Slide Fit Stockings Around The Smaller Tubes. The Stockings Should Go At The End Of The Inner Slide. Sand Stockings So They Are Very Smooth And Fit Smoothly In The Outer Tubes. This Might Take Quite A Bit Of Sanding, So Sand, Check If It Moves Smoothly, Repeat, Until You Have A Working Slide. Do Not Overdo It, The Slide Will Leak If You Sand Too Much Material Away - You Can Always Fix This Later. Glue The Stockings After Checking The Slide Action And Checking The Airtightness Of The Slide. Use Just A Drop Of Glue, Or The Glue Will Add To The Thickness Of The Stockings And You Need To Sand Off More. The Key To A Good Working Slide Is Very Good Alignment. The Tubes Should Be Perfectly Parallel. Check This At Every Point Before Applying Any Glue. Cut The Outer Slide Tubes To Desired Length. Now Assemble Outer Slide And Inner Slide. Do Not Yet Glue. Check If Everything Moves Smoothly And Alignment Is Correct. If So, Glue Outer Slide Crook And Handgrip To Tubes While It Is Around The Inner Tubes, Including The Inner Handgrip. Ensure They Are Straight And Parallel! Cut Inner Slides To Correct Length. Mark The Length While Inserted Into Slide Grip, Do Not Make Them Both The Same Length. You Can Use The Half Outer Slide Grip, Or The One With The Whole Tubes. Half Is Lighter, But Much Harder To Assemble With Correct Alignment. Now Glue The Inner Slide Tubes To The Handgrip While Partially Inserted In The Outer Slide. Ensure They Are Perfectly Parallel And Move Smoothly. Insert Leadpipe And Mouthpiece. You'Re Done! ### Playtesting It Should Sound Like A Trombone. If Instead It Sounds Fuzzy/Plasticy, Worse On Some Notes Than Others, You Probably Have A Leak Somewhere. You Can Find And Fix It And It Should Improve. ### Brass Trombone Compatibility The Printbone Small Fits Several Regular Trombone Parts: - The Outer Slide Fits A Bach 42B Inner Slide. This Bell Will Not Fit. It Will Make For A Very Light Outer Slide - Unlike Any Brass Slide! Parts May Need Adjustment Based On Width Variations Of Different Slides. It Plays And Sounds Well, But A 14.9Mm Tube Would Be Even Better For This Purpose. - The Inner Slide Fits A Bach 42 Outer Slide, If You Sand The Stockings A Bit More. However, It Will Be A Strange Combination - The Slide Fits A A Conn 48H/6H Bell, And Some Conn Director Bells. It Will Be A Bit Brighter Than The Regular Slide On A 48H/6H. - The Bell Fits A Conn 48H/6H Slide, But You Will Need To Extend The Tuning Slide Quite A Bit.

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