Difference between revisions of "Workholding"

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You'll need some sort of option to hold the workpiece, from the basic double-sided tape (this is described in the [http://www.makercam.com/tutorial.html makercam.com tutorial]) to clamps along the edge of the piece to more sophisticated work-holding methods such as [[V slot bed | V-]] and [http://www.shapeoko.com/forum/viewtopic.php?f=11&t=887 T-slot] beds w/ custom clamps or a vacuum table ([http://www.shapeoko.com/forum/viewtopic.php?f=11&t=1407&hilit=clamps Forum discussion]).
 
You'll need some sort of option to hold the workpiece, from the basic double-sided tape (this is described in the [http://www.makercam.com/tutorial.html makercam.com tutorial]) to clamps along the edge of the piece to more sophisticated work-holding methods such as [[V slot bed | V-]] and [http://www.shapeoko.com/forum/viewtopic.php?f=11&t=887 T-slot] beds w/ custom clamps or a vacuum table ([http://www.shapeoko.com/forum/viewtopic.php?f=11&t=1407&hilit=clamps Forum discussion]).
 
  
 
A comment on spacing --- some sort of ratio (phi?) is likely more useful than even spacing.
 
A comment on spacing --- some sort of ratio (phi?) is likely more useful than even spacing.
 +
 +
Discussions:
 +
 +
* https://old.reddit.com/r/hobbycnc/comments/blxmcs/what_is_you_preferred_holding_method_i_just_got_a/
  
 
===Threaded Inserts===
 
===Threaded Inserts===
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http://community.carbide3d.com/t/nomad-waste-peg-board-compilation/9780
 
http://community.carbide3d.com/t/nomad-waste-peg-board-compilation/9780
 +
 +
====Cutrocket====
 +
 +
* SO3: https://cutrocket.com/p/5df91986c3b3c/
 +
* XL: https://cutrocket.com/p/5df9229e8e17c/
 +
* XXL: https://cutrocket.com/p/5df928247387d/
  
 
====Threaded tables====
 
====Threaded tables====
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http://community.carbide3d.com/t/wasteboard-plans-with-threads/3544/19 --- includes Carbide Create files: S3 BED LEVEL.c2d, S3 GRID 1 inch.c2d, 4 Clamps.c2d
 
http://community.carbide3d.com/t/wasteboard-plans-with-threads/3544/19 --- includes Carbide Create files: S3 BED LEVEL.c2d, S3 GRID 1 inch.c2d, 4 Clamps.c2d
 +
 +
Extension for front of machine: https://community.carbide3d.com/t/so3-removable-front-extension-table/3506
  
 
===Mounted clamps===
 
===Mounted clamps===
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===T-slot===
 
===T-slot===
 
* https://shop.carbide3d.com/collections/tools/products/t-track-table
 
* https://shop.carbide3d.com/collections/tools/products/t-track-table
** http://community.carbide3d.com/t/t-track-extrusion/11473 --- drawing of extrusion used
+
** http://community.carbide3d.com/t/t-track-extrusion/11473 --- dimensioned drawing of extrusion used
 
* MDF spacer, T-track, PVC spoilboard: http://www.shapeoko.com/forum/viewtopic.php?f=37&t=8332&p=65068#p65068
 
* MDF spacer, T-track, PVC spoilboard: http://www.shapeoko.com/forum/viewtopic.php?f=37&t=8332&p=65068#p65068
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=30&t=980 My Machine], [http://www.shapeoko.com/forum/viewtopic.php?f=11&t=623 Adjustable Hold Down Bed] --- T-slot[http://www.shapeoko.com/forum/viewtopic.php?f=11&t=887]
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=30&t=980 My Machine], [http://www.shapeoko.com/forum/viewtopic.php?f=11&t=623 Adjustable Hold Down Bed] --- T-slot[http://www.shapeoko.com/forum/viewtopic.php?f=11&t=887]
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====XXL====
 
====XXL====
 +
  
 
https://www.facebook.com/groups/unofficialshapeoko/permalink/535284736879490/
 
https://www.facebook.com/groups/unofficialshapeoko/permalink/535284736879490/
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===Others===
 
===Others===
  
 +
* Parametric threaded wasteboard: https://a360.co/2KRnRjN [https://community.carbide3d.com/t/curing-my-ocd-and-trimming-the-shapeoko/17447/8]
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=11&t=6906&p=54295#p54295 Simple & cheap clamping of workpieces] --- ingenious use of plastic screw anchors in drilled holes allowing the re-use of screw holes and accurate placement of screws for workholding.
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=11&t=6906&p=54295#p54295 Simple & cheap clamping of workpieces] --- ingenious use of plastic screw anchors in drilled holes allowing the re-use of screw holes and accurate placement of screws for workholding.
 
*Nio's [[V slot bed]]
 
*Nio's [[V slot bed]]
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** Prototype Carbide 3D clamping system[http://www.shapeoko.com/forum/viewtopic.php?f=7&t=7096&start=10#p56305]  
 
** Prototype Carbide 3D clamping system[http://www.shapeoko.com/forum/viewtopic.php?f=7&t=7096&start=10#p56305]  
 
** Nomad: http://community.carbide3d.com/t/bamboo-work-clamps-made-with-carbide-create/2177/17
 
** Nomad: http://community.carbide3d.com/t/bamboo-work-clamps-made-with-carbide-create/2177/17
** Shapeoko: http://carbide3d.com/docs/tutorials/shapeoko-clamps/
+
** Shapeoko: http://carbide3d.com/docs/tutorials/shapeoko-clamps/ [https://cutrocket.com/p/5c960e9ad1ac4/ Cutrocket: Shapeoko Clamps]
 
** https://shop.carbide3d.com/collections/tools/products/t-track-table
 
** https://shop.carbide3d.com/collections/tools/products/t-track-table
 
*** https://docs.carbide3d.com/assembly/t-tracks/ --- includes download link for clamp files
 
*** https://docs.carbide3d.com/assembly/t-tracks/ --- includes download link for clamp files
 +
* [https://cutrocket.com/p/5ae918dc448cd/ Cutrocket: CNC Hold Down Clamps]
 
* https://www.shapeoko.com/wiki/index.php/File:HoldDown_clamp.svg --- Cut them in mirrored pairs, pocket the inset half the diameter of a #10-24 or M5 bolt and assemble w/ #8-32 or M3 hardware. Cut a 3/4" dowel to length and drill a hole in it for the selected hardware.[http://community.carbide3d.com/t/sharing-how-level-is-my-wasteboard/4375/16]
 
* https://www.shapeoko.com/wiki/index.php/File:HoldDown_clamp.svg --- Cut them in mirrored pairs, pocket the inset half the diameter of a #10-24 or M5 bolt and assemble w/ #8-32 or M3 hardware. Cut a 3/4" dowel to length and drill a hole in it for the selected hardware.[http://community.carbide3d.com/t/sharing-how-level-is-my-wasteboard/4375/16]
 
* http://community.carbide3d.com/t/nomad-883-threaded-table-and-clamps/4691/2
 
* http://community.carbide3d.com/t/nomad-883-threaded-table-and-clamps/4691/2
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====Commercial Clamps====
 
====Commercial Clamps====
  
 +
* http://littlemachineshop.com/products/product_view.php?ProductID=2718&category= [http://community.carbide3d.com/t/off-the-shelf-step-blocks-and-clamps-for-sea-of-holes-beds/1282]
 +
* http://tradetools.co.nz/products/7000200
 
* http://www.grizzly.com/products/Hold-Down-Clamp-for-T-Slot-Track/D2726 [http://community.carbide3d.com/t/waste-board-t-tracks-7-95/4870]
 
* http://www.grizzly.com/products/Hold-Down-Clamp-for-T-Slot-Track/D2726 [http://community.carbide3d.com/t/waste-board-t-tracks-7-95/4870]
 
* https://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/ttrack.html
 
* https://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/ttrack.html
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**[http://www.amazon.com/dp/B00JWL4LM6/ref=pe_385040_128020140_TE_3p_dp_1 Best Deal Depot Double Sided Foam Tape Adhesive][http://www.shapeoko.com/forum/viewtopic.php?f=32&t=6221&p=48620]
 
**[http://www.amazon.com/dp/B00JWL4LM6/ref=pe_385040_128020140_TE_3p_dp_1 Best Deal Depot Double Sided Foam Tape Adhesive][http://www.shapeoko.com/forum/viewtopic.php?f=32&t=6221&p=48620]
 
** [http://www.amazon.com/Nitto-Permacel-Double-Coated-Kraft/dp/B000QDL9GK Nitto (Permacel) P-02 Double Coated Kraft Paper Tape: 1 in. x 36 yds. (White)][http://community.carbide3d.com/t/double-sided-fixturing-tape-nitto/101]
 
** [http://www.amazon.com/Nitto-Permacel-Double-Coated-Kraft/dp/B000QDL9GK Nitto (Permacel) P-02 Double Coated Kraft Paper Tape: 1 in. x 36 yds. (White)][http://community.carbide3d.com/t/double-sided-fixturing-tape-nitto/101]
 +
** https://www.amazon.com/gp/product/B07BBL4JXJ
 
* Spray adhesive --- e.g., 3M Super 77[http://www.shapeoko.com/forum/viewtopic.php?f=7&t=3415#p25871]
 
* Spray adhesive --- e.g., 3M Super 77[http://www.shapeoko.com/forum/viewtopic.php?f=7&t=3415#p25871]
 
** spray adhesive and contact paper: https://makezine.com/2017/07/19/keep-your-project-secure-cnc-workholding-techniques/
 
** spray adhesive and contact paper: https://makezine.com/2017/07/19/keep-your-project-secure-cnc-workholding-techniques/
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* [http://www.shapeoko.com/forum/viewtopic.php?f=24&t=2088 Large Format Fabric Cutter]
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=24&t=2088 Large Format Fabric Cutter]
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=30&t=3661&p=27477 Drawer Pulls (vacuum table used to cut)] --- [https://drive.google.com/folderview?id=0BzcWwIeAroosZHh0WWlZTHJ5Wms&usp=sharing Google picture link]
 
* [http://www.shapeoko.com/forum/viewtopic.php?f=30&t=3661&p=27477 Drawer Pulls (vacuum table used to cut)] --- [https://drive.google.com/folderview?id=0BzcWwIeAroosZHh0WWlZTHJ5Wms&usp=sharing Google picture link]
* http://makezine.com/projects/shopbot-desktop-universal-vacuum-hold-down-system/
+
* http://makezine.com/projects/shopbot-desktop-universal-vacuum-hold-down-system/ --- https://makezine.com/projects/make-41-tinkering-toys/shopbot-desktop-universal-vacuum-hold-down-system/
 
* https://grabcad.com/library/mini-vacuum-cnc-table-1 --- [http://imgur.com/a/fmzrh photos] ~100x130mm using vacuum cleaner for PCBs.[https://www.reddit.com/r/CNC/comments/3hub59/i_designed_mini_vacuum_table_and_im_sharing_my/]
 
* https://grabcad.com/library/mini-vacuum-cnc-table-1 --- [http://imgur.com/a/fmzrh photos] ~100x130mm using vacuum cleaner for PCBs.[https://www.reddit.com/r/CNC/comments/3hub59/i_designed_mini_vacuum_table_and_im_sharing_my/]
 
* Vacuum table[http://www.shapeoko.com/forum/viewtopic.php?f=7&t=7419&p=58298#p58298]
 
* Vacuum table[http://www.shapeoko.com/forum/viewtopic.php?f=7&t=7419&p=58298#p58298]
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Discussion of making one's own: http://community.carbide3d.com/t/rockler-vacuum-pods/5798/5
 
Discussion of making one's own: http://community.carbide3d.com/t/rockler-vacuum-pods/5798/5
 +
 +
One ingenious idea was to use a layered system which had holes which could be filled with 6mm Airsoft pellets: https://www.facebook.com/groups/unofficialshapeoko/permalink/603645233376773/
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===Tabs===
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An interesting addition, tabs may be added either manually to a file, or as an automated/controlled feature in some [[CAM]] software. tab size/thickness is a consideration. Guideline(s):
 +
 +
* Plywood --- tabs should be thick enough to include 2 plies. [https://www.reddit.com/r/hobbycnc/comments/d7ck1g/holding_down_plywood_with_tabs_recommendations/f0z1wss/]
  
 
==Orienting the Workpiece==
 
==Orienting the Workpiece==
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==Two-sided Cutting==
 
==Two-sided Cutting==
  
https://shop.carbide3d.com/products/nomad-flip-jig --- holds material up to 1.25" thick, 2.9" x 4.9" --- the circular and diamond locator pins are explained in the [https://www.carrlane.com/catalog/index.cfm/27825071F0B221118070C1C513E111D081B0006280B1713050245221E0107070F1A3C3B285356405F Carrlane Catalogue]. Made to hold stock less than 3"x5" in size, and up to 1.2" thick. Machined to .002" tolerance.
+
https://shop.carbide3d.com/products/nomad-flip-jig --- holds material up to 1.25" thick, 2.9" x 4.9" --- the circular and diamond locator pins are explained in the [https://www.carrlane.com/catalog/index.cfm/27825071F0B221118070C1C513E111D081B0006280B1713050245221E0107070F1A3C3B285356405F Carrlane Catalogue]. Made to hold stock less than 3"x5" in size, and up to 1.2" thick. Machined to .002" tolerance. See: http://community.carbide3d.com/t/carbide-3d-flip-frame-for-2-sided-machining/563 and the video at: https://www.youtube.com/watch?v=rXChh__bJsw
  
 
* http://www.shapeoko.com/forum/viewtopic.php?f=7&t=650
 
* http://www.shapeoko.com/forum/viewtopic.php?f=7&t=650
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* http://community.carbide3d.com/t/registration-pins-solution/3843 --- use of threaded rods as registration pins in sea of holes bed
 
* http://community.carbide3d.com/t/registration-pins-solution/3843 --- use of threaded rods as registration pins in sea of holes bed
 
* http://community.carbide3d.com/t/made-a-spoon-with-my-so3/6766
 
* http://community.carbide3d.com/t/made-a-spoon-with-my-so3/6766
 +
* https://community.carbide3d.com/t/a-simple-technique-for-two-sided-work/8117 --- flipping using the Probe
 +
* cutting gears using center holes for fixturing: https://www.reddit.com/r/hobbycnc/comments/eaens8/help_needed_for_cutting_cycloid_disk/
  
 
Using the center of the stock will double any errors, instead opposite corners are suggested: http://community.carbide3d.com/t/flipping-job-strategy/3719/5
 
Using the center of the stock will double any errors, instead opposite corners are suggested: http://community.carbide3d.com/t/flipping-job-strategy/3719/5
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* http://www.winstonmoy.com/2016/03/simple-workholding-clamps/ --- SVG files
 
* http://www.winstonmoy.com/2016/03/simple-workholding-clamps/ --- SVG files
 
* [http://www.cad2gcode.com/cncprojects/id14.html Mill Clamps]
 
* [http://www.cad2gcode.com/cncprojects/id14.html Mill Clamps]
* [http://https//www.inventables.com/projects/colorful-clamp-set Colorful Clamp Set][http://www.shapeoko.com/forum/viewtopic.php?f=30&t=4366]
 
 
* Simple clamps may be fashioned from mending brackets, different lengths of bolts, nuts, and washers[http://www.shapeoko.com/forum/viewtopic.php?f=5&t=3271&p=42754]
 
* Simple clamps may be fashioned from mending brackets, different lengths of bolts, nuts, and washers[http://www.shapeoko.com/forum/viewtopic.php?f=5&t=3271&p=42754]
 
* [http://www.thingiverse.com/thing:776 Thingiverse: CNC Table Clamps]
 
* [http://www.thingiverse.com/thing:776 Thingiverse: CNC Table Clamps]
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===Clamps and clamp sets===
 
===Clamps and clamp sets===
* [https://www.inventables.com/technologies/clamp-set Clamp Set]
+
 
 +
* [https://www.amazon.com/dp/B01MUDCGGV/ Amazon: 24 Pcs Clamp Kit Set M6 (6 mm) For Rotary Tables, Milling Tables, Face Plates & Vertical Slide]
 
* https://www.a2zcorp.us/store/ProductDetailNP.asp?Cguid=%7B6F714609-E2EF-4AD1-A2A2-DC0488BFE2DD%7D&ProductID=5811&Category=WorkHolding%3AMillingClamps
 
* https://www.a2zcorp.us/store/ProductDetailNP.asp?Cguid=%7B6F714609-E2EF-4AD1-A2A2-DC0488BFE2DD%7D&ProductID=5811&Category=WorkHolding%3AMillingClamps
 
* Rockler
 
* Rockler
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*** http://littlemachineshop.com/products/product_view.php?ProductID=1972&category=1130
 
*** http://littlemachineshop.com/products/product_view.php?ProductID=1972&category=1130
 
*** http://littlemachineshop.com/products/product_view.php?view=classic&ProductID=203912
 
*** http://littlemachineshop.com/products/product_view.php?view=classic&ProductID=203912
 
 
* http://tradetools.co.nz/products/7000200 [http://community.carbide3d.com/t/off-the-shelf-step-blocks-and-clamps-for-nomad-sea-of-holes-beds/1282/4]
 
* http://tradetools.co.nz/products/7000200 [http://community.carbide3d.com/t/off-the-shelf-step-blocks-and-clamps-for-nomad-sea-of-holes-beds/1282/4]
 
* http://vacuumtables.co.uk/product/cast-aluminium-t-slot-plate-low-profile-6040/ [http://www.shapeoko.com/forum/viewtopic.php?f=35&t=7645&p=60367#p60361]
 
* http://vacuumtables.co.uk/product/cast-aluminium-t-slot-plate-low-profile-6040/ [http://www.shapeoko.com/forum/viewtopic.php?f=35&t=7645&p=60367#p60361]
 
* [https://www.amazon.com/dp/B00012XE0A Grizzly low-profile cam clamps][http://community.carbide3d.com/t/how-do-you-guys-secure-your-projects/2490/10]
 
* [https://www.amazon.com/dp/B00012XE0A Grizzly low-profile cam clamps][http://community.carbide3d.com/t/how-do-you-guys-secure-your-projects/2490/10]
 +
* [https://www.amazon.com/dp/B00012XE0A Amazon Shop Fox D3347 Cam Clamp] [https://community.carbide3d.com/t/shapeoko-up-and-running/14709/12]
 
* http://www.incra.com/jig_fixture-build-it_system-clamp.html [http://www.shapeoko.com/forum/viewtopic.php?f=7&t=8292&p=64827#p64827]
 
* http://www.incra.com/jig_fixture-build-it_system-clamp.html [http://www.shapeoko.com/forum/viewtopic.php?f=7&t=8292&p=64827#p64827]
 
* http://www.widgetworksunlimited.com/CNC_Pressure_Foot_Clamping_Attachment_p/cnc-pressure.htm
 
* http://www.widgetworksunlimited.com/CNC_Pressure_Foot_Clamping_Attachment_p/cnc-pressure.htm
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===Vise===
 
===Vise===
 +
 +
* https://shop.carbide3d.com/collections/accessories/products/low-profile-vise https://community.carbide3d.com/t/vise-and-jig-in-fusion-360/3538/6
 
* [http://www.rockrivertools.com/ Rock River Tools CNC Router Vise] --- 10 X 14 Vise. A Vectric VCarve file to face the base of the vice is available.  
 
* [http://www.rockrivertools.com/ Rock River Tools CNC Router Vise] --- 10 X 14 Vise. A Vectric VCarve file to face the base of the vice is available.  
 
* http://www.stickvise.com --- a low profile PCB vise.[http://blog.cnccookbook.com/2015/06/19/clever-stickvise-from-a-cnccookbook-customer/]
 
* http://www.stickvise.com --- a low profile PCB vise.[http://blog.cnccookbook.com/2015/06/19/clever-stickvise-from-a-cnccookbook-customer/]
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===Fixturing Wax===
 
===Fixturing Wax===
  
* [http://www.machinablewax.com/product.php?product=44 Rigidax Tooling & Fixturing Wax][http://www.shapeoko.com/forum/viewtopic.php?f=7&t=5870&p=44595#p44504] --- discussion of using it: http://www.shapeoko.com/forum/viewtopic.php?f=7&t=5870&p=46230
+
* [http://www.machinablewax.com/product.php?product=44 Rigidax Tooling & Fixturing Wax][http://www.shapeoko.com/forum/viewtopic.php?f=7&t=5870&p=44595#p44504] --- discussion of using it: http://www.shapeoko.com/forum/viewtopic.php?f=7&t=5870&p=46230 Source: https://www.paramelt.com/acquisition-of-casting-wax-producer-argueso.aspx MSDS: http://www.machinablewax.com/docs/MSDS_WI-Blue_23-8_Rigidax_Mar19-2009.pdf
  
 
===DIY===
 
===DIY===
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http://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-plasma-welding-and-fab/building-new-weld-fab-table-how-would-you-do-179769/
 
http://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-plasma-welding-and-fab/building-new-weld-fab-table-how-would-you-do-179769/
 +
 +
Spoilboard pattern (parametric): https://www.instructables.com/id/Spoilboard-Pattern/ [https://www.reddit.com/r/hobbycnc/comments/ekazmu/i_resurfaced_my_spoilboard_and_added_a_grid/]
  
 
==Fixture designs==
 
==Fixture designs==
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''Jigs and fixtures : a reference book showing many types of jigs'' F.H. Colvin and L.L. Haas. http://www.worldcat.org/title/jigs-and-fixtures-a-reference-book-showing-many-types-of-jigs-fh-colvin-and-ll-haas/oclc/220304459
 
''Jigs and fixtures : a reference book showing many types of jigs'' F.H. Colvin and L.L. Haas. http://www.worldcat.org/title/jigs-and-fixtures-a-reference-book-showing-many-types-of-jigs-fh-colvin-and-ll-haas/oclc/220304459
 +
 +
https://en.wikibooks.org/wiki/Design_of_Jigs_%26_Fixtures
  
 
https://www.reddit.com/r/CNC/comments/b3fdrf/cnc_sheet_stock/
 
https://www.reddit.com/r/CNC/comments/b3fdrf/cnc_sheet_stock/

Revision as of 13:24, 27 January 2020

Workholding is usually a combination of wasteboard / bed design and matching clamps. A further addition and nicety are Fixtures. (Forum example)

Securing the Workpiece

You'll need some sort of option to hold the workpiece, from the basic double-sided tape (this is described in the makercam.com tutorial) to clamps along the edge of the piece to more sophisticated work-holding methods such as V- and T-slot beds w/ custom clamps or a vacuum table (Forum discussion).

A comment on spacing --- some sort of ratio (phi?) is likely more useful than even spacing.

Discussions:

Threaded Inserts

SO3

XL

XXL

http://community.carbide3d.com/t/xl-and-xxl-threaded-insert-table-grid-and-clamps/4014

Note that with a two part wasteboard and supporting structure as on an XXL, one can decouple a half, machine it, and then switch as shown in: http://community.carbide3d.com/t/2-inch-grid-my-first-project-xxl3/4826/9

http://community.carbide3d.com/t/nomad-waste-peg-board-compilation/9780

Cutrocket

Threaded tables

https://www.reddit.com/r/shapeoko/comments/5wseg5/custom_workholding/ --- elegant aluminum clamp to use with threaded table

http://community.carbide3d.com/t/wasteboard-plans-with-threads/3544/19 --- includes Carbide Create files: S3 BED LEVEL.c2d, S3 GRID 1 inch.c2d, 4 Clamps.c2d

Extension for front of machine: https://community.carbide3d.com/t/so3-removable-front-extension-table/3506

Mounted clamps

T-slot

XXL

https://www.facebook.com/groups/unofficialshapeoko/permalink/535284736879490/

  • 4 - Misumi HFSQN4-15250-1015 ALUMINUM FRAME incl. shipping: $263.99 https://us.misumi-ec.com/vona2/detail/110302261820/?ProductCode=HFSQN4-15250-1015
  • 1 pack of 100 - Misumi PACK-HNTP6-6 NUTS FOR ALUMINUM FRAMES (spring nuts) incl. shipping: $55.01
  • 16 - M6-1 flat head machine bolts (not very long - can't remember the exact length): $6
  • 1/2" felt strip for steel bar: $3.50
  • 1" steel bar from local steel company: $17

Also: Help from next door neighbor brazing tabs onto the steel bar for mounting: Priceless

Additionally: a tap-and-die set, a countersink bit, drill bits you're comfortable using on aluminum and steel, and plenty of time and patience.

Others

Clamps

Use clamps with fixtures and corners to secure material from the sides: https://www.facebook.com/groups/232744457133521/permalink/304142256660407/

Commercial Clamps

Vises

Centering: http://www.visionengravers.com/store/p_small_cent_vise.html

Adhesives

Suggestions for when using adhesives[21]:

Fasteners

Clamping systems

Tooling Plates

Vacuum

Discussion of making one's own: http://community.carbide3d.com/t/rockler-vacuum-pods/5798/5

One ingenious idea was to use a layered system which had holes which could be filled with 6mm Airsoft pellets: https://www.facebook.com/groups/unofficialshapeoko/permalink/603645233376773/

Tabs

An interesting addition, tabs may be added either manually to a file, or as an automated/controlled feature in some CAM software. tab size/thickness is a consideration. Guideline(s):

  • Plywood --- tabs should be thick enough to include 2 plies. [39]

Orienting the Workpiece

Considerations when placing the workpiece on the machine:

  • Which side should be up / down?
    • If you're milling blind rabbets for a box-bottom, then the nice side should be on the top
  • Where should one reference the machine origin?
    • If you're milling rabbets, then the reference should be to the work surface where the nice side is
    • If you're willing a piece which has countersinks for mounting hardware, then the reference should be the top of the workpiece

Once it is placed, the Zero position will need to be set. It may be necessary to do this sequentially, one axis at a time, possibly even using relative offsets from the desired origin.[40]

Location of a small piece relative to larger stock: http://community.carbide3d.com/t/printing-small-object-on-large-stock/1831

Ensuring workpiece is plumb

There are several options for this:

  • Tram the wasteboard[41]
  • Probe the workpiece/surface[42]
  • Mill a holding pocket in a suitable material
  • Shim the workpiece[43]

Two-sided Cutting

https://shop.carbide3d.com/products/nomad-flip-jig --- holds material up to 1.25" thick, 2.9" x 4.9" --- the circular and diamond locator pins are explained in the Carrlane Catalogue. Made to hold stock less than 3"x5" in size, and up to 1.2" thick. Machined to .002" tolerance. See: http://community.carbide3d.com/t/carbide-3d-flip-frame-for-2-sided-machining/563 and the video at: https://www.youtube.com/watch?v=rXChh__bJsw

Using the center of the stock will double any errors, instead opposite corners are suggested: http://community.carbide3d.com/t/flipping-job-strategy/3719/5

Four-sided frame

http://community.carbide3d.com/t/4-sided-flip-frame-prototype/2882

Soft Jaws

http://community.carbide3d.com/t/workflow-for-machining-small-objects/1032/5

Drilling Holes

http://www.shapeoko.com/forum/viewtopic.php?f=7&t=7362&p=58151#p58151

Clamp Designs

Discussions:

https://www.reddit.com/r/CNC/comments/48u6yn/low_profile_vise_optionsrecommendations/

Other options:

One option is to mill a rabbet along the bottom edge of a piece and clamp into that: https://www.facebook.com/groups/232744457133521/permalink/259281501146483

Accessories

thumbv3.stl[49] --- fits M6 SHCS

Usage

http://community.carbide3d.com/t/work-part-clamping-many-of-you-are-doing-it-wrong/3396

Use a bar across large flat stock: https://www.reddit.com/r/CNC/comments/5cvnck/best_way_to_hold_material_on_cnc_bed/d9zq4oa/

Commercial Accessories and Products

Threaded tables/wasteboards

Shapeoko

Nomad

Clamps and clamp sets

Machinist’s parallels

Vise

Vacuum

Fixturing Wax

DIY

Threaded insert tools

Carbide 3D wasteboard thicknesses

  • original SO3 two-part MDF wasteboard ~12.7mm --- current production (since Summer 2016?) are 0.75"
  • SO3 alu. threaded table ~13mm
  • XL MDF wasteboard ~19.5mm
  • Nomad MDF wasteboard ~12.85mm
  • Nomad alu. threaded table ~15.7mm[70]

Table designs

http://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-plasma-welding-and-fab/building-new-weld-fab-table-how-would-you-do-179769/

Spoilboard pattern (parametric): https://www.instructables.com/id/Spoilboard-Pattern/ [71]

Fixture designs

Quick Clamp Fixture --- design using http://www.destaco.com/manual-clamps.html

Boxes

http://www.tailmaker.net/clamping-jig.html


Boards held vertically

https://www.popularwoodworking.com/article/microadjustable_finger_joint_jig/

Fixture drawn up in Carbide Create: https://community.carbide3d.com/t/cnc-finger-joint-box/8880/47

Machining stock square

http://community.carbide3d.com/t/platonic-solids/867/9

References

http://www.cnccookbook.com/CCCNCMillingWorkholding.html

http://makezine.com/2016/06/20/7-cnc-fixturing-tips-small-shop/ [72]

http://www.opensourcemachinetools.org/archive-manuals/milling_fixtures_MSR_No4_1912.pdf

Jigs and fixtures : a reference book showing many types of jigs F.H. Colvin and L.L. Haas. http://www.worldcat.org/title/jigs-and-fixtures-a-reference-book-showing-many-types-of-jigs-fh-colvin-and-ll-haas/oclc/220304459

https://en.wikibooks.org/wiki/Design_of_Jigs_%26_Fixtures

https://www.reddit.com/r/CNC/comments/b3fdrf/cnc_sheet_stock/