RCroller shooter - Revision history

Cwehmeyer3 at 02:02, 14 June 2018

2018-06-14T02:02:27Z

Rosawa3: added category tags

2013-11-17T22:41:22Z

added category tags

AndyB at 02:21, 27 April 2007

2007-04-27T02:21:23Z

AndyB: /* Capacitor Charger */

2007-01-16T17:47:14Z

‎Capacitor Charger

AndyB: /* Capacitor Charger */

2007-01-16T17:42:41Z

‎Capacitor Charger

AndyB: /* Capacitor Charger */

2007-01-12T16:40:28Z

‎Capacitor Charger

AndyB at 16:39, 12 January 2007

2007-01-12T16:39:49Z

BenH: /* Capacitor Data */

2006-09-25T23:31:08Z

‎Capacitor Data

BenH: /* Capacitor Data */

2006-09-25T23:30:49Z

‎Capacitor Data

BenH: /* Capacitor Data */

2006-09-25T23:22:32Z

‎Capacitor Data

← Older revision		Revision as of 02:02, 14 June 2018
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	[[Category: RoboCup]]		[[Category: RoboCup]]
−	[[Category~~: Electrical]]~~	+	[[Category: 2006-2007]]
−	~~[[Category: Year~~: 2006-2007]]

← Older revision		Revision as of 22:41, 17 November 2013
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	==Links==		==Links==
	[[RobocupElectrical\|Electrical Homepage]]		[[RobocupElectrical\|Electrical Homepage]]
		+
		+	[[Category: RoboCup]]
		+	[[Category: Electrical]]
		+	[[Category: Year: 2006-2007]]

@@ Line 63: / Line 63: @@
 *[http://www.st.com/stonline/books/pdf/docs/1332.pdf ST Micro Dual Switch mode Solenoid Driver, 2.5A@40V]
-==Articles==
+==Notes==
 ==Links==
 [[RobocupElectrical|Electrical Homepage]]

@@ Line 30: / Line 30: @@
 ==Capacitor Charger==
-* [http://www.linear.com/pc/categoryProducts.do Linear Technologies] Crappy website which doesn't allow permalinks. But, wide selection, good app notes, the only offerings which can handle our (relatively) high system voltage (9.6 VDC). Samples ordered of the LT3485-3 and LT3585-3. Probably gonna use one of those two.
+* [http://www.linear.com/pc/categoryProducts.do Linear Technologies] Crappy website which doesn't allow permalinks. But, wide selection, good app notes, the only offerings which can handle our (relatively) high system voltage (9.6 VDC). Samples ordered of the LT3485-3 and LT3585-3. These parts should charge the caps quicker then others, but a a reduced efficiency ~80% in comparison to Linear's other offerings. Probably gonna use one of those two.
 * [http://www.allegromicro.com/pm/XENON_Photoflash_Cap_Charger.asp Allegro]
 * [http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=692&uiTemplateId=NODE_STRY_PGE_T TI]

@@ Line 30: / Line 30: @@
 ==Capacitor Charger==
-* [http://www.linear.com/pc/categoryProducts.do Linear Technologies]
+* [http://www.linear.com/pc/categoryProducts.do Linear Technologies] Crappy website which doesn't allow permalinks. But, wide selection, good app notes, the only offerings which can handle our (relatively) high system voltage (9.6 VDC). Samples ordered of the LT3485-3 and LT3585-3. Probably gonna use one of those two.
 * [http://www.allegromicro.com/pm/XENON_Photoflash_Cap_Charger.asp Allegro]
 * [http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=692&uiTemplateId=NODE_STRY_PGE_T TI]

@@ Line 4: / Line 4: @@
 /04/06 - I like the rail gun idea, and I tried doing it once with no success. But look up info on solenoids, they are probably the easiest to build. Essentially all you need is a coil driver of some sort, its essentially a chip, I've posted some on this page so look there. You can connect the chip into the circuit and it acts a switch. We can dump charge from the capacitor through it and ito the inductor. But yeah keep looking and be sure to post stuff here --[[User:Marksp|Phillip]] 12:17, 4 July 2006
 <br>
-/02/06 - Just shooting off some ideas here. I read that the CMU team uses three(!) charged capacitors at 200V to drive a custom solonoid and that their shooting can hit the ball at around 35mph... that's ~ 51.3ft/s, 15.65m/s, or 1565cm/s. Do we even have a camera in mind that can capture anything near that fast? More importantly, do they, really? It says they have the smallest 3CCD "prosumer" comcorder from sony... I really don't think that's a crazy-fast FPS camera, so perhaps that's something to consider (that is, worrying more about where the ball is '''likely to go''' rather than where exactly it is while the other team has it). As for the shooter itself, I don't know much about solonoids, but I'll be looking those up soon. I did, however, have a quick idea about what we might could do... I don't know how feasible it would be, but maybe a small device that acts somewhat like a rail gun could be used. We'd take a small metal rod, hook it up so that it can't shoot out the front of the robot, then put it in a tunnel of small coils connected to some capacitors. When the capacitors drain, the coils would propel the rod like 1-1.5 inches out of the robot to hit the ball. It's probably not practical by any means... so I'm looking into other possible solutions as well. ;) -- [[User:ScottT|ScottT]] 11:21, 2 July 2006 (EDT)
+/02/06 - Just shooting off some ideas here. I read that the CMU team uses three(!) charged capacitors at 200V to drive a custom solenoid and that their shooting can hit the ball at around 35mph... that's ~ 51.3ft/s, 15.65m/s, or 1565cm/s. Do we even have a camera in mind that can capture anything near that fast? More importantly, do they, really? It says they have the smallest 3CCD "prosumer" camcorder from sony... I really don't think that's a crazy-fast FPS camera, so perhaps that's something to consider (that is, worrying more about where the ball is '''likely to go''' rather than where exactly it is while the other team has it). As for the shooter itself, I don't know much about solonoids, but I'll be looking those up soon. I did, however, have a quick idea about what we might could do... I don't know how feasible it would be, but maybe a small device that acts somewhat like a rail gun could be used. We'd take a small metal rod, hook it up so that it can't shoot out the front of the robot, then put it in a tunnel of small coils connected to some capacitors. When the capacitors drain, the coils would propel the rod like 1-1.5 inches out of the robot to hit the ball. It's probably not practical by any means... so I'm looking into other possible solutions as well. ;) -- [[User:ScottT|ScottT]] 11:21, 2 July 2006 (EDT)
 ==Capacitor Data==
@@ Line 28: / Line 28: @@
 it draws .98A continuously to fire every 10 sec
 ==To Do==

@@ Line 27: / Line 27: @@
 If the robot operates at 7.2V and 80% efficiency into the capacitor then
-it draws.98A continuously to fire every 10 sec
+it draws .98A continuously to fire every 10 sec
 ==To Do==

@@ Line 7: / Line 7: @@
 ==Capacitor Data==
-[http://www.cde.com/new/catalog/alum/#flash Capacitors] from CDE that are electrolytic and photoflash.
+This a link to [http://www.cde.com/new/catalog/alum/#flash Capacitors] from CDE that are electrolytic and photoflash. The sell high-power capacitors. Don't check digi-key, they don't sell high power.[http://www.cde.com/catalogs/7P.pdf This] is a spec sheet for the capacitor we are thinking about.
-[http://www.cde.com/catalogs/7P.pdf This] is a spec sheet for the capacitor we are thinking about.
+The part number for our particular capacitor from CDE is 7P122V330A052. It is a 1200uF capacitor rated at 360V that we plan to run at 300V
 We based our calculations on the following:
@@ Line 21: / Line 19: @@
 .62 J -- energy to shoot the ball
-If the robot operates at 7.2V and 80% efficiency into the capacitor then
+we need 56.2 J in the capacitor. So we need
-.98A draw to fire every 10 sec
+.4 uF capacitor (E = .5*C*V^2; running at 300V)
-IF we assume 10% efficiency from the capacitor to the ball then
+it draws.98A continuously to fire every 10 sec
 ==To Do==