12-5-2024 Q&A: Double-Sided Projects, Vacuum Tables, and Challenge Coins

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This Q&A session covered techniques for double-sided CNC projects, including creating jigs for accurate flipping and alignment. We explored vacuum table options and their benefits, methods for engraving challenge coins, and common troubleshooting tips for CNC toolpath errors.

Key Tips Learned in this Q&A:

• Double-Sided Project Alignment: Use asymmetric dowel holes or create jigs with pockets to align pieces accurately when flipping.
• Vacuum Table Use: Airweights vacuum tables offer reliable solutions for holding down workpieces; consider sacrificial MDF layers to protect surfaces during cuts.
• Toolpath Management: Always double-check tool diameter settings in the database and set machining allowances to prevent errors in 3D finishing toolpaths.
• Engraving Challenge Coins: Create custom jigs to hold circular blanks in place and use diamond drag bits for clean engravings on metal.
• Vacuum Table Alternatives: Double-sided tape like X Fasten can work effectively for smaller projects but may gum up tools if cut through.

Questions Answered in this Q&A:

• 00:02:30 - How many passes should I use for specific material thicknesses?
• 00:04:13 - Why did my toolpath cut deeper than expected on a double-sided project?
• 00:07:09 - Does saving a toolpath in VCarve update the G-code file automatically?
• 00:10:49 - Has anyone used Vectric's new EasyCarve software?
• 00:12:41 - How do I set up double-sided projects for challenge coins?
• 00:46:01 - Why did my 3D roughing tool remove too much material using the raster option?

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