From: Ian Jackson Date: Mon, 24 Jul 2023 17:50:42 +0000 (+0100) Subject: topeak-mtx-tortec-expeditionrack-adapter: sort out length X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=d019b7c343359e997883f85315e95354f1c5f126;p=reprap-play.git topeak-mtx-tortec-expeditionrack-adapter: sort out length Signed-off-by: Ian Jackson --- diff --git a/topeak-mtx-tortec-expeditionrack-adapter.scad b/topeak-mtx-tortec-expeditionrack-adapter.scad index e62c4de..5ed42a4 100644 --- a/topeak-mtx-tortec-expeditionrack-adapter.scad +++ b/topeak-mtx-tortec-expeditionrack-adapter.scad @@ -20,7 +20,6 @@ rear_elevation_nominal = 10.04; rear_to_front_distance = 230; // rack cross rail (fam) to very front end rear_to_cross_rail = 43.05; // bolt centre to rail centre, rail to rear rear_bolt_to_front_bolt = 155.4; -front_to_cross_rail = 43.05; // XXX // bolt centre to rail centre, rail to front front_elevation_nominal = 3; cross_rail_distance = 232.09; @@ -98,6 +97,11 @@ strap_barrel_x = rack_width_inner/2 + strap_barrel_dia/2; rack_shear_ratio = -rear_elevation_nominal / rear_to_front_distance; +front_to_cross_rail = + cross_rail_distance * sqrt(1 - rack_shear_ratio * rack_shear_ratio) + - rear_bolt_to_front_bolt + - rear_to_cross_rail; + brk_bolt_nut_top_y = -brk_nearbolt_recess_depth - brk_bolt_eff_len + brk_bolt_nut_th + brk_bolt_len_slop;