{"id":1397,"date":"2015-02-02T18:59:48","date_gmt":"2015-02-03T02:59:48","guid":{"rendered":"http:\/\/jazzistentialism.com\/blog\/?page_id=1397"},"modified":"2017-10-05T23:28:17","modified_gmt":"2017-10-06T07:28:17","slug":"lhires-iii-modifications-archive","status":"publish","type":"page","link":"http:\/\/jazzistentialism.com\/blog\/?page_id=1397","title":{"rendered":"Lhires III modifications archive"},"content":{"rendered":"

1. Light protection<\/h2>\n

The “Heathcote Light Shield”. A quick removal, lightweight felt lined box that provides protection against inherent light leaks around the diffraction grating assembly.<\/p>\n

\"HLS\"<\/p>\n

 <\/p>\n

Flocking around the diffraction grating to minimise internal reflections:<\/p>\n

\"flocking1\"<\/p>\n

2. Guide mirror adjustment<\/h2>\n

Spring loaded guide mirror collimation screws to make adjustment much easier:<\/p>\n

\"Lhires3. Neon automation<\/h2>\n

The motorised neon assembly uses an Arduino Uno circuit board for driving a micro servo, together with a mofset for controlling 12V DC power to the neon lamp driver.<\/p>\n

\"Arduino_mofset\"<\/p>\n

The servo is mounted to a bracket that allows a simple ‘push fit’ into a reversed servo horn attached to the output of the existing neon shaft. The assembly is held in place with a single hex screw. Power and USB are at the rear of the circuit housing. A Visual Basic \u00a0program provides control of the neon assembly, and future collimator focus.<\/p>\n

\"neon_box_rear\"<\/a><\/p>\n


\n\"neon_box_mounted1\"<\/a><\/p>\n

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A close-up view of the reversed\u00a0servo horn assembly. The idea, adapted from the design by Stephane Ubaud<\/a> is self explanatory.<\/p>\n

\"neon_coupling\"<\/p>\n

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<\/h2>\n

\"VB\"<\/a><\/p>\n

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4. Motorised collimator focus<\/h2>\n

Step 1 –\u00a0Mounting the main gear. A spur gear bored to 40mm internal diameter held onto the existing collimator lens barrel with 3 screws set at 120 degrees.<\/p>\n

\"focus_gear1\"<\/a> \"focus_gear2\"<\/a><\/p>\n

 <\/p>\n

\"collimator_gear\"<\/a><\/p>\n

 <\/p>\n

Next steps … internally mounted continuous rotation micro servo (under construction).<\/p>\n

5. Mirror adjustment<\/h2>\n

This modification utilises a spring mounted \u00a0screw for precise pivot adjustment of the main mirror.<\/p>\n

\"mirror1\"<\/a> \"mirror2\"<\/a><\/p>\n

6. Internal flocking<\/h2>\n

\"flock\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

1. Light protection The “Heathcote Light Shield”. A quick removal, lightweight felt lined box that provides protection against inherent light leaks around the diffraction grating assembly.   Flocking around the diffraction grating to minimise internal reflections: 2. Guide mirror adjustment … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0},"_links":{"self":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1397"}],"collection":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1397"}],"version-history":[{"count":30,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1397\/revisions"}],"predecessor-version":[{"id":1630,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1397\/revisions\/1630"}],"wp:attachment":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}