From 7d3b4c0a6c3b461c4616aa95d14b33f801fdf27f Mon Sep 17 00:00:00 2001 From: "Brian S. Stephan" Date: Fri, 10 Nov 2023 15:49:26 -0600 Subject: [PATCH] update notes on bolts/plate heights --- README.md | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/README.md b/README.md index fe39e10..0c0c8a3 100644 --- a/README.md +++ b/README.md @@ -37,7 +37,11 @@ What you'll need beyond these objects: * 4 M3 8mm hex bolts to secure the PCB to a panel * Per frame and plate combo: * 4 40mm M4 hex brass standoffs (or equivalent) - * 8 12-16mm M4 countersunk hex bolts + * 8 M4 countersunk hex bolts + * Overhang plates should use 12-16mm length bolts since they are taller + * Inset plates should probably use 8-12mm bolts --- some standoffs aren't threaded the whole way, making 16mm + too long to go flush + * If making the 40mm standoffs from multiple smaller ones, make sure they have enough length to take your bolts! * Per frame connection point: * 8 16mm M4 bolts * 8 M4 flange nuts @@ -56,8 +60,8 @@ This is a rough estimate of the cost to produce one of these sticks, assuming a Filament masses from Bambu Studio estimates, using Bambu PLA Basic. * Left and right frame: **$7.08 USD** (141.84g each, as of 2023-09-12) -* Left and right top panels: **~$6.74 USD** (~135g each, as of 2023-09-12) -* Left and right bottom panels: **$5.90 USD** (118.16g each, as of 2023-09-12) +* Left and right (overhang) top panels: **~$6.74 USD** (~135g each, as of 2023-09-12) +* Left and right (overhang) bottom panels: **$5.90 USD** (118.16g each, as of 2023-09-12) * Miscellaneous mounting plates, decorative plates, etc.: **~$1.00 USD** (~40g, as of 2023-09-12) * 8 16mm M4 bolts to connect the frames: **$0.72 USD** (you can get a pack of 100 on Amazon for $9, as of 2023-09-12) * 8 M4 flange nuts to connect the frames: **$0.68 USD** (you can get a pack of 100 on Amazon for $8.50, as of 2023-09-12) @@ -74,9 +78,6 @@ Filament masses from Bambu Studio estimates, using Bambu PLA Basic. * 8 16mm M4 bolts to connect top plates to frames: **$0.72 USD** (you can get a pack of 100 on Amazon for $9, as of * 8 12mm M4 bolts to connect bottom plates to frames: **$0.72 USD** (you can get a pack of 100 on Amazon for $9, as of 2023-09-12) - * You may be tempted to use 16mm M4 bolts for both the top and bottom, but the spacers I have aren't threaded all - the way through the shaft, and 16mm bolts won't make it all the way on the bottom panel, but do on the top panel - (which is 5mm thicker); be careful I guess With an enclosure coming in around $26, depending on your choices --- say, ~$30 for TheTrain's RP2040 Advanced Breakout Board, ~$60 for Sanwa buttons and a lever, and ~$20 for miscellaneous connectors and wiring --- you can put a