{"id":1277,"date":"2022-04-02T23:59:00","date_gmt":"2022-04-03T04:59:00","guid":{"rendered":"https:\/\/scope-eye.net\/?p=1277"},"modified":"2022-04-03T10:49:27","modified_gmt":"2022-04-03T15:49:27","slug":"well-give-it-a-shot-day-49","status":"publish","type":"post","link":"https:\/\/scope-eye.net\/?p=1277","title":{"rendered":"We&#8217;ll give it a shot&#8230; (day 49)"},"content":{"rendered":"<p>It&#8217;s been challenging to make headway this week, just a lot going on. As always, just got to keep at it as well as I can. Last time I reworked the polycap installation for the midriff joint, and lamented the fact that the connecting rods installed in the midriff were still so far out of whack. Today I used a guide to reinstall the rods with better alignment, and also made some adjustments to the chest block for better symmetry.<br \/>\n<a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_11.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_11_thumb.jpeg\" title=\"Using a jig to align the connecting rods for the midriff joint\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_10.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_10_thumb.jpeg\" title=\"Checking alignment on the chest block after adjustment: Seems pretty good...\"><\/a><br \/>\n<!--more--><br \/>\nBecause the connecting rods for the midriff joint were installed manually and independently of each other, they wound up a bit misaligned. This kind of misalignment causes stress on the joint and limits its range:<br \/>\n<a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_alignment_check.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_alignment_check_thumb.jpeg\" title=\"The left side rod is angled slightly higher than the right side rod...\"><\/a><br \/>\nI figured the best way to deal with this would be to tear out the rods (again!), widen their mounting holes in the midriff part, and create a jig to hold two rods parallel at the proper distance, and then use that to rebuild the mounting holes.<br \/>\n<a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_1.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_1_thumb.jpeg\" title=\"I started by measuring the proper separation distance between the rods...  Get the outer dimension, subtract the rod diameter...\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_2.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_2_thumb.jpeg\" title=\"Derp, I needed to subtract DOUBLE the rod diameter. Sometimes I forget how numbers work. It's OK, I can still use this.\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_3.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_3_thumb.jpeg\" title=\"I cut some more plates (with the proper width!) and sandwiched them together so I could attach the rods, then checked it in the mounting holes to make sure it'd fit.\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_4.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_4_thumb.jpeg\" title=\"It's important to make sure it not only fits, but fits IN THE CORRECT ALIGNMENT...  Looks good...\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_5.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_5_thumb.jpeg\" title=\"Another quick alignment check, the plate should be perpendicular to the midline. Looks good...\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_6.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_6_thumb.jpeg\" title=\"Packed the mounting holes with epoxy putty and reinstalled the guide\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_7.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_7_thumb.jpeg\" title=\"Derped it, I set the new mounting holes at too-shallow and angle...  It doesn't fit together.\"><\/a><br \/>\nUnfortunately on the first attempt I made a mistake &#8211; I tried to figure out the correct angle and position for the rods myself and jump straight to setting the new mounting holes with the guide, and wound up with holes that were at too-shallow an angle, and a non-functional joint. So I basically tore out that work and did it again: This time by first setting the mounting hole for the left side by connecting the midriff to the torso, then using the alignment jig to set the right-side mounting hole to match the left:<br \/>\n<a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_8.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_8_thumb.jpeg\" title=\"Remaking the left-side mounting hole (again!), this time using the joint itself as the guide\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_9.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_9_thumb.jpeg\" title=\"The left-side mounting hole has been reset to the proper position, and the right-side hole is still at the wrong angle...\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_10.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_10_thumb.jpeg\" title=\"I tore out the blue epoxy putty I'd used to pack the right-side mounting hole, so I could re-set it with the jig\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_11.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_midriff_joint_rework_11_thumb.jpeg\" title=\"Using the jig to set the right-side mounting hole to match the left\"><\/a><br \/>\nI&#8217;ll need to wait for the epoxy putty to cure before I can see how well that work turned out. In the mean time, I decided to make some more adjustments to the chest block symmetry. All the work I did last time that didn&#8217;t really pan out &#8211; that aligned the top of the chest but misaligned <em>all<\/em> the rest of the chest&#8230;  I undid that. I decided to bulk up the top panel of the right-side chest block shell by 1\/2mm, and then trim the same amount of thickness off the outer surface.<br \/>\n<a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_1.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_1_thumb.jpeg\" title=\"I removed the spacer-plate I added to the bottom of the chest core's right side...  It was the wrong move.\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_2.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_2_thumb.jpeg\" title=\"A little symmetry check - unfortunately not real helpful. It seems everything is a little off. It could be that I didn't align the camera well enough in this shot.\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_3.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_3_thumb.jpeg\" title=\"Symmetry check the other way: this one seems a little more promising. It could be that the slope of the inner edge of the shells is off a bit.\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_4.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_4_thumb.jpeg\" title=\"I added the gray plate to the interior of the chest block shell and marked out a rough line for how far to cut down the outer surface\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_5.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_5_thumb.jpeg\" title=\"I mark the line with a hobby knife then fill the line with marker, and remove the ink surrounding the line\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_6.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_6_thumb.jpeg\" title=\"The shoulder joint fringe isn't super-symmetrical anyway, but with the shell being made shorter, the top edge of the fringe on this side gets too close to the top edge of the shell - so I adjusted the top edge downward a bit to improve it.\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_7.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_7_thumb.jpeg\" title=\"Establishing the position of the new styrene strip for the top edge of the shoulder joint fringe\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_9.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_9_thumb.jpeg\" title=\"Basic symmetry check of the shoulder joint fringes - it passes casual inspection at least\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_10.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_chest_adjustment_10_thumb.jpeg\" title=\"Symmetry check of the assembled chest block after adjustment...  It looks pretty good. It was probably already 'good enough' but having spotted the elevation differences before I couldn't let it go.\"><\/a><br \/>\nFinally, after consulting the reference art a bit I decided that the portions of the cockpit canopy that descend around the sides of the hatch should be narrower &#8211; which in turn means that the cockpit hatch itself should be wider to fill the space. I adjusted the canopy a bit and did another application of epoxy putty to the hatch.<br \/>\n<a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_canopy_adjustment_1.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_canopy_adjustment_1_thumb.jpeg\" title=\"I trimmed down the 'forks' descending from the canopy, so there's now a bit of a gap between them and the hatch\"><\/a> <a href=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_canopy_adjustment_2.jpeg\"><img decoding=\"async\" src=\"\/model-data\/1_100_Zaku_Kai\/zakufz_20220402_canopy_adjustment_2_thumb.jpeg\" title=\"I added epoxy putty to the hatch to fill the gap. As previously noted the hatch is one of those parts that I'm kind of figuring out as I go.\"><\/a><br \/>\nIt&#8217;s tricky trying to solve symmetry problems: I use one set of features to align the two parts and use that alignment to check another set of features&#8230;  But <em>everything<\/em> is going to be a little bit misaligned, so there&#8217;s no real reliable reference point. This is what makes clearly-established centerlines so valuable, you get a reference point that can be the arbiter of any symmetry questions&#8230;  But for a part like the chest block shell, which is not itself (as a single half) symmetrical and so doesn&#8217;t have a centerline&#8230;  It&#8217;s kind of difficult.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s been challenging to make headway this week, just a lot going on. As always, just got to keep at it as well as I can. Last time I reworked the polycap installation for the midriff joint, and lamented the fact that the connecting rods installed in the midriff were still so far out of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[8,86,11,68],"_links":{"self":[{"href":"https:\/\/scope-eye.net\/index.php?rest_route=\/wp\/v2\/posts\/1277"}],"collection":[{"href":"https:\/\/scope-eye.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scope-eye.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scope-eye.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/scope-eye.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1277"}],"version-history":[{"count":1,"href":"https:\/\/scope-eye.net\/index.php?rest_route=\/wp\/v2\/posts\/1277\/revisions"}],"predecessor-version":[{"id":1278,"href":"https:\/\/scope-eye.net\/index.php?rest_route=\/wp\/v2\/posts\/1277\/revisions\/1278"}],"wp:attachment":[{"href":"https:\/\/scope-eye.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scope-eye.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scope-eye.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}