Differences
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smtstencil [2014/04/30 20:25] – created srw7 | smtstencil [2020/11/04 18:02] (current) – swalde | ||
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- Modify-> | - Modify-> | ||
- Modify-> | - Modify-> | ||
- | - Set velocity to 60 and power to 1% (This might still need tweaking) | + | - Set velocity to 40 and power to 1% |
- "Carve Out" | - "Carve Out" | ||
Clean up the rough edges with wet fine emery paper. I used 1000 grit. | Clean up the rough edges with wet fine emery paper. I used 1000 grit. | ||
+ | |||
+ | To use, I build up a " | ||
+ | |||
+ | Carefully place all SMT components on the board. | ||
+ | |||
+ | ---- | ||
+ | |||
+ | Erik's smt stencil etching method | ||
+ | (more involved, but optimized for quicker etching time) | ||
+ | |||
+ | Steps 1-6 as before | ||
+ | |||
+ | - select all→right click→clone→3columns, | ||
+ | - select Leftmost board, edit width to be 0.1mm (toolbar on the left) (make sure " | ||
+ | - same as above, but with Rightmost board | ||
+ | - select all→right click→Scatter Group | ||
+ | - select all→right click→fill, | ||
+ | - zoom in to a small pad to check dpi setting - if lines are too far apart to get all the detail, increase scan dpi - if dpi is very high, it will take longer to etch | ||
+ | - if you decreased the dpi you may have to unfocus the laser and increase the power | ||
+ | - set velocity to 800 (it will go as fast as it can) and power to 30% | ||
+ | - carve out | ||
+ | |||
+ | ---- | ||
+ | ==Gerber to DXF (New, even more complicated workflow)== | ||
+ | |||
+ | Okay, but I have a Gerber file (that someone gave me, so, no, I can't re-export from Eagle/ | ||
+ | |||
+ | Simple! | ||
+ | |||
+ | - Open the GTP file in Gerbv | ||
+ | - Export as PNG, 1016 dpi (this is arbitrary and is a leftover from a previous attempted workflow) | ||
+ | - Load PNG into GIMP | ||
+ | - Set DPI in Image-> | ||
+ | - Colour-> | ||
+ | - Colour-> | ||
+ | - Select-> | ||
+ | - Select-> | ||
+ | - New Layer, white background | ||
+ | - Fill (whole selection) with black | ||
+ | - delete original layer | ||
+ | - Export as PNG | ||
+ | - Load PNG into Inkscape | ||
+ | - Trace Bitmap | ||
+ | - delete bitmap | ||
+ | - Note dimensions in mm | ||
+ | - save as DXF | ||
+ | - Load into Smartcarve | ||
+ | - Set the dimensions | ||
+ | |||
+ | * | ||
+ | - New possible process from here? (avoids having to " | ||
+ | - In The Gimp, choose Selection-> | ||
+ | - Open the paths dock. Right-click on the path and choose " | ||
+ | - Name the SVG file to export. | ||
+ | |||
+ | ==Gerber to DXF (This one failed with 45 degree rounded-end pads. gerbv totally screwed up the export)== | ||
+ | |||
+ | Okay, but I have a Gerber file (that someone gave me, so, no, I can't re-export from Eagle/ | ||
+ | |||
+ | Simple! | ||
+ | |||
+ | I did this all on Linux, so if things work different on Windows, please let me know. | ||
+ | |||
+ | Use **gerbv** to open the gerber file. Look at it. Use the Measure tool to measure some easy-to-repeat dimension. | ||
+ | |||
+ | Open that SVG file in **Inkscape**. | ||
+ | |||
+ | Now, open that DXF in **LibreCAD**. (This step might not be necessary, but follow along for now.) Remember that dimension I asked you to measure? | ||
+ |