Document Type
Alternative Top Bracing
Publication Date
Summer 7-22-2022
Description
This electronic document file set consists of an overview presentation (PDF-formatted) file and companion video (MP4) and CADD files (DWG & DXF) for laser cutting the ETSU-developed alternate top bracing designs and marking templates for the STEM Guitar Project’s BBT (OM-sized) standard acoustic guitar kit. The three (3) alternative BBT top bracing designs in this release are
(a) a one-piece base for the standard kit's (Martin-style) bracing,
(b) 277 Ladder-style bracing, and
(c) an X-braced fan-style bracing similar to traditional European or so-called 'classical' acoustic guitars.
The CADD data set for each of the three (3) top bracing designs includes
(a) a nominal 24" x 18" x 3mm (0.118") Baltic birch plywood laser layout of
(1) the one-piece base with slots,
(2) pre-radiused and pre-scalloped vertical braces with tabs to ensure proper orientation and alignment, and
(3) various gages and jigs and
(b) a nominal 15" x 20" marking template.
The 'provided as is" CADD data is formatted for use on a Universal Laser Systems (ULS) laser cutter digital (CNC) device. Each CADD drawing is also provided in two (2) formats: Autodesk AutoCAD 2007 .DWG and .DXF R12. Users should modify and adapt the CADD data as required to fit their equipment. This CADD data set is released and distributed under a Creative Commons license; users are also encouraged to make changes o the data and share (with attribution) their designs with the worldwide acoustic guitar building community.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Hemphill, Bill, "BBT Acoustic Alternative Top Bracing CADD Data Set-NoRev-2022Jun28" (2022). STEM Guitar Project’s BBT Acoustic Kit. 2.
https://dc.etsu.edu/oer-guitars-acoustic-bbt/2
Laser-BBT_Top_Bracing_M03-24x18_NoRev_RC02_2022June27.dwg (153 kB)
Laser_Marking-BBT_Top_Bracing_M03-NoRev_RC02_2022June27.dwg (90 kB)
Laser-BBT_277_Ladder-RevG-RC01-2022Jun17-24_x_18.dwg (177 kB)
Laser-LH-BBT_277L_Ladder-RevF-RC01-2022Feb03-24_x_18-PROTOTYPE.dwg (178 kB)
Laser_Marking-BBT_277_Ladder-RevG-RC01-2022Jun17.dwg (80 kB)
Laser-BBT_X-Fan-RevB-RC04-2022Jan27-24_x_18.dwg (190 kB)
Laser_Marking-BBT_X-Fan-RevD-RC02-2022Jun27.dwg (84 kB)
Laser-Waxed_Bakers_Sheet-Guitar-RevA.dwg (72 kB)
Laser-BBT_Top_Bracing_M03-24x18_NoRev_RC02_2022June27.dxf (507 kB)
Laser_Marking-BBT_Top_Bracing_M03-NoRev_RC02_2022June27.dxf (96 kB)
Laser-BBT_277_Ladder-RevG-RC01-2022Jun17-24_x_18.dxf (877 kB)
Laser_Marking-BBT_277_Ladder-RevG-RC01-2022Jun17.dxf (87 kB)
Laser-BBT_X-Fan-RevB-RC04-2022Jan27-24_x_18.dxf (1015 kB)
Laser_Marking-BBT_X-Fan-RevD-RC02-2022Jun27.dxf (107 kB)
Laser-Waxed_Bakers_Sheet-Guitar-RevA.dxf (12 kB)
ETSU_Standards-CADD_CAM_CNC-RevG.pdf (100 kB)
Alt_Bracing_Bases_x_3-2022Jun24.PNG (170 kB)
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