RC13HighStrengthEncoderWires - Revision history

Mbayyari3 at 01:03, 25 May 2020

2020-05-25T01:03:07Z

Kberzinch3: Text replacement - "Category: Year: 2012-2013" to "Category:2012-2013"

2018-07-19T02:00:28Z

Text replacement - "Category: Year: 2012-2013" to "Category:2012-2013"

Rosawa3: corrected spelling

2014-08-29T05:56:43Z

corrected spelling

Rosawa3: recategorizing

2013-11-09T11:25:43Z

recategorizing

Rosawa3 at 07:59, 18 July 2013

2013-07-18T07:59:56Z

Rosawa3: /* High-Strength(HS) Prototype */

2012-12-26T08:42:06Z

‎High-Strength(HS) Prototype

Rosawa3: /* Problems and Possible Causation */

2012-12-26T08:29:28Z

‎Problems and Possible Causation

Rosawa3 at 07:52, 26 December 2012

2012-12-26T07:52:55Z

Rosawa3: Created page with "== Overview == In the past, there have been cases of encoder faults being detected due to encoder wires breaking. The terminals in use are the Molex 1.25mm pitch Pico Blade termi..."

2012-12-26T07:37:09Z

Created page with "== Overview == In the past, there have been cases of encoder faults being detected due to encoder wires breaking. The terminals in use are the Molex 1.25mm pitch Pico Blade termi..."

New page

== Overview ==
In the past, there have been cases of encoder faults being detected due to encoder wires breaking. The terminals in use are the Molex 1.25mm pitch Pico Blade terminals (encoder side) and the Molex 2.00mm pitch Sherlock terminals (board side). Four of these signal wires are bound with heat shrink tubing to create each encoder wire.

== Problems and Possible Causation ==
* The wires tend to break near the encoder side (connector terminal breaks off)
** Imperfect wire stripping causes poor crimping, making the conenctor very fragile
* Wire tends to break on disconnect
** The older revision E4P encoder used a through-hole version of the mating connector, which made disconnecting of the wire very difficult
** High connection resistance and small room for handling the connectors required inevitable improper methods to be taken to disconnect the wire (partial tugging on the wire itself)

@@ Line 35: / Line 35: @@
 * No consistency in the quality of recycled parts (although the two prototypes were functional)
-[[Category: RoboCup]]
+[[Category: RC Electrical]]
-[[Category: Electrical]]
 [[Category:2012-2013]]

@@ Line 37: / Line 37: @@
 [[Category: RoboCup]]
 [[Category: Electrical]]
-[[Category: Year: 2012-2013]]
+[[Category:2012-2013]]

@@ Line 3: / Line 3: @@
 == Problems and Possible Causation ==
 * The wires tend to break near the encoder side (connector terminal breaks off)
-** Imperfect wire stripping causes poor crimping, making the conenctor very fragile
+*The wires tend to break near the encoder side (connector terminal breaks off)
-* Wire tends to break on disconnect
+**Imperfect wire stripping causes poor crimping, making the connector very fragile
-** The older revision E4P encoder used a through-hole version of the mating connector, which made disconnecting of the wire very difficult
+*Wire tends to break on disconnect
-*** E4P encoders manufactured after 11/29/2011 have the surface-mount version of the connector (signifcantly lower connection resistance)
+**The older revision E4P encoder used a through-hole version of the mating connector, which made disconnecting of the wire very difficult
-** High connection resistance and small room for handling the connectors required inevitable improper methods to be taken to disconnect the wire (partial tugging on the wire itself)
+***E4P encoders manufactured after 11/29/2011 have the surface-mount version of the connector (signifcantly lower connection resistance)
 == High-Strength(HS) Prototype ==

@@ Line 35: / Line 35: @@
 [[Category: RoboCup]]
-[[Category: RoboCup Electrical]]
+[[Category: Electrical]]
-[[Category: RoboCup 2013]]
+[[Category: Year: 2012-2013]]

← Older revision		Revision as of 07:59, 18 July 2013
Line 33:		Line 33:
	* Takes a long time to assemble		* Takes a long time to assemble
	* No consistency in the quality of recycled parts (although the two prototypes were functional)		* No consistency in the quality of recycled parts (although the two prototypes were functional)
		+
		+	[[Category: RoboCup]]
		+	[[Category: RoboCup Electrical]]
		+	[[Category: RoboCup 2013]]

← Older revision		Revision as of 08:42, 26 December 2012
Line 25:		Line 25:
	* Use a larger diameter heat shrink tubing to bundle the four wires		* Use a larger diameter heat shrink tubing to bundle the four wires
	* Put on the board-side connector housing		* Put on the board-side connector housing
		+
		+	=== Results ===
		+	* After 50 connect/disconnect tests (wire-tugging), the encoder wire assembly maintained functionality
		+	* Crimped terminals do not slip off of solid-core wire (unexpected)
		+
		+	=== Issues ===
		+	* Takes a long time to assemble
		+	* No consistency in the quality of recycled parts (although the two prototypes were functional)

← Older revision		Revision as of 07:52, 26 December 2012
Line 8:		Line 8:
	** The older revision E4P encoder used a through-hole version of the mating connector, which made disconnecting of the wire very difficult		** The older revision E4P encoder used a through-hole version of the mating connector, which made disconnecting of the wire very difficult
	** High connection resistance and small room for handling the connectors required inevitable improper methods to be taken to disconnect the wire (partial tugging on the wire itself)		** High connection resistance and small room for handling the connectors required inevitable improper methods to be taken to disconnect the wire (partial tugging on the wire itself)
		+
		+	== High-Strength(HS) Prototype ==
		+	=== Goals ===
		+	* Strengthen the encoder-side connection
		+	* Allow the wire to be safely disconnected by tugging on the wire assembly
		+
		+	=== Assembly ===
		+	* Cut off a short length of excess leads from through-hole mount components (e.g. IR LEDs, photodiodes, buzzer, etc.)
		+	* Crimp an encoder-side terminal on the lead
		+	* Solder on a length of stranded wire on the lead+terminal (make effort not to have sharp points around the solder joints)
		+	* Place the lead+terminal+wire in an open slot in the encoder-side conenctor housing
		+	* Put on a short length of thin heat shrink tubing on the lead+terminal+wire to cover the exposed metal (to prevent shorts between the signal wires when bundled)
		+	* Repeat the above steps three more times using the same connector housing
		+	* Strip off a small segment of the insulation and crimp on the board-side terminals on each of the four wires
		+	* Use a larger diameter heat shrink tubing to bundle the four wires
		+	* Put on the board-side connector housing