http://derek-gregoriev.com/blog daily 0.75 2021-01-12 http://derek-gregoriev.com/blog/2021/1/11/web-development-quest monthly 0.5 2021-01-12 http://derek-gregoriev.com/blog/2020/7/15/3d-canvas-for-tkinter monthly 0.5 2020-07-15 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1594848604758-UIAGTLRE9MOX0Y39XWDS/ui_3dviewer.png Blog - 3D Canvas for Tkinter https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1594848626840-V0YZUF1M53MMP6G22ZJ9/ui_3dviewer_0.png Blog - 3D Canvas for Tkinter Starting geometry. The circled point is transformed to be centered in the middle of the window (<0,0,0>). The transform for the visual spun the coordinate system about its x axis 180 deg to put positive values going up (screen coordinate 0,0 is top left) then translated to the middle of the screen. https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1594848728664-5FYKEDH5D42JGX7MQO2P/ui_3dviewer_rotk.png Blog - 3D Canvas for Tkinter This is a rotate performed on the rotate matrix/coord system along its z axis (out of page) https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1594848750383-M7CMVJHVRWX2BP4PXGVZ/ui_3dviewer_rotkroti.png Blog - 3D Canvas for Tkinter This is a rotation of the view about the x axis after having rotated about the z axis. The dilation appearing like we are seeing over the top of the square is what we would expect. http://derek-gregoriev.com/blog/2020/3/2/b380kc61c5139xzanwdazus212bvaf monthly 0.5 2020-03-02 http://derek-gregoriev.com/blog/2020/1/23/bvmzrusjj9imwickgmhp7cf1oq7qfu monthly 0.5 2020-01-23 http://derek-gregoriev.com/blog/2020/1/20/enclosure-update monthly 0.5 2020-01-20 http://derek-gregoriev.com/blog/2019/12/8/3d-printer-enclosure monthly 0.5 2019-12-10 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1575861355009-MQ08FSWEOHYX17X3C2ZA/EnclosureCost.png Blog - 3d Printer Enclosure Solidworks model of full construction and basic cost on the right organized by most costly element (angle bracket that’s used everywhere is most costly). https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1575862473807-YATUET6M4YNGJCO5154O/8020_1inTframing.png Blog - 3d Printer Enclosure T-slot Framing Properties for aluminum section (Solidworks did the area and moment of inertia calcs) https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1575955935280-EXGX8B254TYJRM0Z1CNB/PETG_Tframing.png Blog - 3d Printer Enclosure Approximate PETG section equivalent for shear to the 1in T-Frame solution https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1575957314724-JRWOY3M5P7LTYMWCIROQ/PETG_CrossSection.png Blog - 3d Printer Enclosure Similar drawing to that provided for the Aluminum T-framing http://derek-gregoriev.com/blog/2019/12/8/the-inbetween monthly 0.5 2019-12-08 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1575839156123-UMR37RZ8JODZOHZ4D3FB/image-asset.jpeg Blog - The Inbetween This was my colleague measuring the moment arm from the pivot of the ball joint but more importantly the structural support for this ball joint and it’s sister setup had far too many problems for me to feel good. This was an endurance setup that used cartridge heaters to get up to ~900F. And…… We are using aluminum as our structural material. But worse than that, the fasteners to the table were 1/4in and the holes are 5/8in…. There wasn’t enough time to fully fix this and get it entirely reliable but at least I was able to line up the brackets so that the load on the base plate went almost directly into the table without much of a span. Ultimately we completed the testing but fixing this with real design elements with proper torque ratings, temperatures and structural configuration has been time consuming. (I’ve since added a DAQ, digital motor control, digital counter, and drawings and model files for digital representation) http://derek-gregoriev.com/blog/2017/3/29/good-gravy-batman monthly 0.5 2017-03-30 http://derek-gregoriev.com/blog/2016/7/23/getting-back monthly 0.5 2016-07-23 http://derek-gregoriev.com/blog/2016/2/2/busy monthly 0.5 2016-02-03 http://derek-gregoriev.com/blog/2015/11/22/improved-scripting-shell monthly 0.5 2015-11-22 http://derek-gregoriev.com/blog/2015/11/16/javac-python-all-talking-to-each-other monthly 0.5 2015-11-17 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1447740799879-3XGZRB3KAK1OR2BJBWQT/image-asset.png Blog - Java,C++, Python all talking to each other http://derek-gregoriev.com/blog/2015/11/5/project-management-program-progress monthly 0.5 2015-11-05 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1446749683925-VEXKA1FQQEW119SY8WWG/image-asset.png Blog - Project Management Program progress http://derek-gregoriev.com/blog/2015/10/20/in-process monthly 0.5 2015-10-20 http://derek-gregoriev.com/blog/2015/9/23/pi-vision monthly 0.5 2015-09-24 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1443056759687-JID2QNJ10SOV5IMAHVAK/image-asset.jpeg Blog - PI Vision http://derek-gregoriev.com/blog/2015/9/19/learning-python-step1 monthly 0.5 2015-09-19 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1442690933793-4ZLGDFD1CQWAXVBJKIX8/Learning+Python Blog - Learning Python Step1 http://derek-gregoriev.com/blog/2015/9/2/its-alive monthly 0.5 2015-09-02 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1441235985600-27NSCE2T65F2EXS33PI1/image-asset.jpeg Blog - It's Alive!! http://derek-gregoriev.com/about daily 1.0 2020-06-25 http://derek-gregoriev.com/softwareprojects daily 0.75 2015-09-07 http://derek-gregoriev.com/designprojects daily 0.75 2020-06-29 https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593394244147-FI6H9QON2ORIEVFCLPHS/GantryCNCMachine.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593394327537-N93ZR8CPRN28NLFHL101/GantryCNCMachine_1.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593394441639-QJL19GM807KQ9ZKEXBEF/GantryCNCMachine_2.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593392848544-WJIGA3IK5B5S8V1YWZIM/tableTop.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593393430616-NZDVDH3G5Z38QN9H0CTZ/tableTop_propane.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593393274223-XIA79NIC6ZAF7OAKEDWB/IMG_3008.JPG Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593388400103-O1E8BZU4T7EP0RWIR2HD/PrinterEnclosure_corner.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593388553969-3EUN02IYN8CODAHQQWG4/PrinterEnclosure_extension.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593386495206-9TS1B4EH7KQNG5IMOZJ6/PrinterEnclosure.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593386520405-UTCIA5LT9Y4I0OWP4ZSA/PrinterEnclosure_1.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593386541251-4X3RQQWIP1FO29FNSWE2/PrinterEnclosure_cost.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593389798167-ANIHVQ17V1YDM7BYFPYV/hangerofhangers_1.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593389877530-CRM6PFL1OH8R9RWN112H/hangerofhangers.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593391077561-KBCEWBN1DHBXL9H12PXZ/IMG_3007.JPG Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593391494522-28Y3YO3TAUVNBK4C4OU8/IMG_1688.JPG Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593382866008-QNYO09P9IX5RJ9LWWF64/iphoneCase.png Design Projects https://images.squarespace-cdn.com/content/v1/55e28eabe4b02a7ba7160167/1593383232147-UBZ4OOW3BLV92LQ19LZX/iphoneCase_2.png Design Projects