wiki:v1:building_the_pan_tilt_2
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wiki:v1:building_the_pan_tilt_2 [2018/01/08 22:13] jfrench fixed numbering |
wiki:v1:building_the_pan_tilt_2 [2018/01/10 20:30] jfrench added fastener convenience link |
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| Note: the servos in the pictures will look different than the ones in your kit. They are functionally identical, so please don't worry! | Note: the servos in the pictures will look different than the ones in your kit. They are functionally identical, so please don't worry! | ||
| + | |||
| + | ===== Pixy Modification ===== | ||
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| + | For these servos to work properly, you will need to make a small modification to Pixy. Unfortunately, it requires a soldering iron and a bit of solder, but the modification is easy and doesn't require much soldering skill. | ||
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| + | The new servos are more efficient and require less power (which is good), but they are more sensitive to voltage drops. The current-limiting resistors (the big ones R18, R20) need to be bypassed. If they are not bypassed, the pan/tilt motion may be erratic (which is bad). | ||
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| + | Locate C25 and C26 on the back side of Pixy toward the right edge of the board. We need to short the two inner pads of C25 and C26:\\ | ||
| + | {{:wiki:img:img_5054_web.jpg?500}} | ||
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| + | Do this by placing your soldering iron and heating up the two inner pads of C25 and C26 while adding solder. The solder should easily bridge once enough solder has been added:\\ | ||
| + | {{:wiki:img:img_5060_web.jpg?500}} | ||
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| + | The complete modification looks like this:\\ | ||
| + | {{:wiki:img:img_5062_web.jpg?500}} | ||
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| + | OK, once that's done, you're ready for the... | ||
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| + | ===== Pan/Tilt Assembly ===== | ||
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| You will need the following (in addition to a Pixy and a pan/tilt kit): | You will need the following (in addition to a Pixy and a pan/tilt kit): | ||
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| small wire cutters\\ | small wire cutters\\ | ||
| {{wiki:img:53d4f497e925e9cea4b191e5b6b689062bbdb314.jpg?200}} | {{wiki:img:53d4f497e925e9cea4b191e5b6b689062bbdb314.jpg?200}} | ||
| + | |||
| + | ==== Fastener Types ==== | ||
| There are lots of different types of fasteners included in this kit. Refer to the picture below to help you find which fastener we are referring to in these instructions. | There are lots of different types of fasteners included in this kit. Refer to the picture below to help you find which fastener we are referring to in these instructions. | ||
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| and adjusting the mounting angle of the horn such that the center of travel has the servo horn pointing downwards. Note, it's OK to move the servo in this way even though it requires a fair amount of force. And it makes a cool sound! | and adjusting the mounting angle of the horn such that the center of travel has the servo horn pointing downwards. Note, it's OK to move the servo in this way even though it requires a fair amount of force. And it makes a cool sound! | ||
| - | 3 - Find one of the **servo horn fasteners** in the one of the servo baggies. (Refer to the fastener picture above.) Screw the servo horn tightly. (In the picture below, the servo is shown with the servo horn pointing downwards, which should be roughly the center of travel.) | + | 3 - Find one of the **servo horn fasteners** in the one of the servo baggies. (Refer to [[wiki:v1:building_the_pan_tilt_2#fastener-types|the fastener picture above.]]) Screw the servo horn tightly. (In the picture below, the servo is shown with the servo horn pointing downwards, which should be roughly the center of travel.) |
| {{wiki:img:7ee78c9b22fa78f4685f9b4d45850229fbb9665c.jpg?400}} | {{wiki:img:7ee78c9b22fa78f4685f9b4d45850229fbb9665c.jpg?400}} | ||
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| {{wiki:img:d577ac16aa27420903e032cae30aacf1edd45076.jpg?400}} | {{wiki:img:d577ac16aa27420903e032cae30aacf1edd45076.jpg?400}} | ||
| - | 10 - Grab two of the **long tapping fasteners**. (Refer to the fastener picture above.) Use these fasteners to secure the 2nd servo. | + | 10 - Grab two of the **long tapping fasteners**. (Refer to [[wiki:v1:building_the_pan_tilt_2#fastener-types|the fastener picture above.]]) Use these fasteners to secure the 2nd servo. |
| (make sure not to overtighten! Snug is fine) | (make sure not to overtighten! Snug is fine) | ||
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| Nice. Now put this assembly aside for now. | Nice. Now put this assembly aside for now. | ||
| - | 12 - Take your Pixy and attach two one-threaded brackets to it as shown in the picture below. Use two **short 4-40 fasteners** to do this. (Refer to the fastener picture above.) | + | 12 - Take your Pixy and attach two one-threaded brackets to it as shown in the picture below. Use two **short 4-40 fasteners** to do this. (Refer to [[wiki:v1:building_the_pan_tilt_2#fastener-types|the fastener picture above.]]) |
| {{wiki:img:282c0833db6b46305afc895c5988fc63a5e50cad.jpg?400}} | {{wiki:img:282c0833db6b46305afc895c5988fc63a5e50cad.jpg?400}} | ||
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| {{wiki:img:b7c62eed53a6cbc598610c6ce68c298b2209a974.jpg?400}} | {{wiki:img:b7c62eed53a6cbc598610c6ce68c298b2209a974.jpg?400}} | ||
| - | 21 - Grab a circular servo horn from one of the servo baggies and attach it to the pan/tilt base with two **short tapping fasteners**. (Refer to the fastener picture at top of page.) | + | 21 - Grab a circular servo horn from one of the servo baggies and attach it to the pan/tilt base with two **short tapping fasteners**. (Refer to [[wiki:v1:building_the_pan_tilt_2#fastener-types|the fastener picture above.]]) |
| It's a bit hard to tell from the photos below, but the shoulder (sticky-outy-bit) of the servo horn should be facing away from the pan/tilt base - not going through the center hole of the base. The servo horn has lots of holes -- rotate it until some of the larger ones line up with the holes in the pan/tilt base, then screw it in place. | It's a bit hard to tell from the photos below, but the shoulder (sticky-outy-bit) of the servo horn should be facing away from the pan/tilt base - not going through the center hole of the base. The servo horn has lots of holes -- rotate it until some of the larger ones line up with the holes in the pan/tilt base, then screw it in place. | ||
wiki/v1/building_the_pan_tilt_2.txt ยท Last modified: 2018/01/10 20:30 by jfrench
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