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servo-continuous-modify [2013/03/12 14:34]
207.242.93.140 ESmQnCzfLNgF
servo-continuous-modify [2013/06/08 09:33]
zoza old revision restored
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-mPWJao ​[url=http://​zpeiudjatpyj.com/​]zpeiudjatpyj[/​url][link=http://​hnntdfiitdwc.com/​]hnntdfiitdwc[/​link]http://​swwsmadpsjxl.com/+====== Modify HiTEC servo HS-645MG for continuous rotation ====== 
 + 
 + 
 +HiTEC HS-645MG servo before modification 
 + 
 +{{::​servo-modify-000.jpg?​nolink&​500|}} 
 + 
 +no soldering, no cutting, no part replacements..... 
 + 
 +!!! the modification is **reversible** ​ (if you keep all the parts and don't damage anythingof course) 
 + 
 +==== step 1remove the screw which holds the arm ==== 
 + 
 + 
 +{{::​servo-modify-001.jpg?​nolink&​500|}} 
 + 
 +==== step 2: remove the arm ==== 
 + 
 +{{::​servo-modify-002.jpg?​nolink&​500|}} 
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 +==== step 3: remove the 4 bottom screws ==== 
 + 
 +{{::​servo-modify-003.jpg?​nolink&​500|}} 
 + 
 +==== step 4: take the top and bottom part of the casing off ==== 
 + 
 +{{::​servo-modify-004.jpg?​nolink&​500|}} 
 + 
 +==== step 5: remove the screw which holds the potentiometer in place ==== 
 + 
 +{{::​servo-modify-005.jpg?​nolink&​500|}} 
 + 
 +==== step 6: remove the metal gear ==== 
 + 
 +* the gear with the pin will come off together with the second gear shown on the piece of paper.  
 + 
 +{{:​servo-modify-006.jpg?​nolink&​500|}} 
 + 
 +==== step 7: pull the potentiometer out ==== 
 + 
 +* it should come out very easilyno force needed 
 + 
 +{{::​servo-modify-007.jpg?​nolink&​500|}} 
 + 
 +==== step 8make a hole in the casing ==== 
 + 
 +* the hole should be big enough for the three potentiometer wires to pass comfortably when you close back the casing 
 + 
 +{{::​servo-modify-008.jpg?​nolink&​500|}} 
 + 
 +==== step 9: remove the metal pin from the gear ==== 
 + 
 +* hold the pin with a pair of locking pliers. gently hit the top of the gear with a hammer to push the pin out. be careful not to damage the gear. 
 + 
 +* you can save the pinin case you want to modify the servo back to normal 
 + 
 +{{::​servo-modify-009a.jpg?​nolink&​500|}} 
 + 
 +{{::​servo-modify-009b.jpg?​nolink&​500|}} 
 + 
 +==== step 10: put the gears back in place ==== 
 + 
 +* make sure to put them back all the way so they can move 
 + 
 +{{::​servo-modify-010.jpg?​nolink&​500|}} 
 + 
 +==== step 11: put the bottom back leaving the potentiometer outside ==== 
 + 
 +{{:​servo-modify-011.jpg?​nolink&​500|}} 
 + 
 +==== step 12: put the top and the bottom of the casing back ==== 
 + 
 +* make sure the potentiometer'​s wires are not caught or pressed 
 + 
 +{{::​servo-modify-012.jpg?​nolink&​500|}} 
 + 
 +==== step 13: test the servo! ==== 
 + 
 +* connect the servo to a microcontroller and turn the potentiometer until you find a position where the servo doesn'​t turn. this will be you 90degrees. 
 + 
 +* any value bigger than 90 (but smaller than 180)  will make the servo spin clockwise. accordingly,​ values between 0 and 89 will make it spin counterclockwise. ​ the bigger the difference between 90 and the given value, the faster it will turn.  
 + 
 +{{::servo-modify-013.jpg?​nolink&​500|}} 
 + 
 + 
servo-continuous-modify.txt · Last modified: 2013/06/08 09:33 by zoza