Magnets - Revision history

Chklnk: /* Electromagnets */ Dupe word

2024-05-28T06:22:53Z

Electromagnets: Dupe word

Chklnk: Clean/organize

2023-11-26T23:41:55Z

Clean/organize

User at 04:30, 24 November 2021

2021-11-24T04:30:16Z

RCEvents: Added some safety stuff to magnets

2021-07-09T20:59:22Z

Added some safety stuff to magnets

RCEvents at 15:17, 14 June 2021

2021-06-14T15:17:57Z

Chklnk: Added weapon benefit

2021-06-13T07:55:01Z

Added weapon benefit

User: Added video of magnet-assisted bots fighting

2021-06-13T03:19:57Z

Added video of magnet-assisted bots fighting

User at 03:13, 13 June 2021

2021-06-13T03:13:04Z

Chklnk: (New page) A mere outline wrapped around a helpful link

2021-06-13T01:08:34Z

(New page) A mere outline wrapped around a helpful link

New page

If permitted in the rules of the competition, magnets may be used in combat robots.
*If the arena floor is a ferromagnetic material like iron or steel, you can increase the apparent weight of the bot by having it pull itself down with magnets, making it harder for other bots to lift, push, or flip. Remember that when deployed, this makes the drive motors work much harder!
*It is possible to use magnets to attract steel parts on other bots. If you become stuck and can’t release the other bot, though, you may draw a forfeit or a loss.

[https://www.kjmagnetics.com/calculator.asp This calculator] may be useful for force estimates.

=Permanent magnets=
Rare-earth magnets are among the most powerful. These attract all the time. If used on the bottom of your bot to add downforce, ensure that they will not come loose during the match.

=Electromagnets=
A simple coil of insulated wire around a suitable core material makes an electromagnet. These require a lot of power and are typically used intermittently, e.g. to hold the bot to the floor during an attack.

← Older revision		Revision as of 06:22, 28 May 2024
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	=Electromagnets=		=Electromagnets=
−	A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are ~~typically~~ used intermittently, e.g. to hold the bot to the floor at the moment of an attack. Because of their higher weight and added design complexity, electromagnets are rarely used, but they help to avoid the drawbacks listed above that may cause your bot to lose matches.	+	A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are used intermittently, e.g. to hold the bot to the floor at the moment of an attack. Because of their higher weight, current requirements, and added design complexity, electromagnets are rarely used, but they help to avoid the drawbacks listed above that may cause your bot to lose matches.

@@ Line 3: / Line 3: @@
 <br>
 If permitted in the rules of the competition, magnets may be used in combat robots.
-*If the arena floor is a ferromagnetic material like iron or steel, you can increase the apparent weight of the bot by having it pull itself down with magnets, making it harder for other bots to lift, push, or flip. Remember that when deployed, these make your drive motors work much harder! Conversely, magnets might help a lifter or suplex bot to get "solid footing" for a better grip when grappling. Consider any benefits or challenges related to your bot's weapon.
+If the arena floor is a ferromagnetic material like iron or steel, you can increase the apparent weight of the bot by having it pull itself down with magnets, making it harder for other bots to lift, push, or flip. Remember that when deployed, these make your drive motors work much harder! Conversely, magnets might help a lifter or suplex bot to get "solid footing" for a better grip when grappling. Consider any benefits or challenges related to your bot's weapon.
 [https://www.kjmagnetics.com/calculator.asp This calculator] may be useful for force estimates.
 <br><br>
 =Permanent magnets=
-Rare-earth neodymium magnets are extremely powerful and can provide a significant advantage to a robot. If used on the bottom of your bot to add downforce the robot can have the pushing power of a much heavier robot. Also, with the increased down-force but no extra mass, robot acceleration can increase dramatically if the motors can provide the needed power. There are drawbacks to using permanent magnets. Loose debris in the arena can become attracted to them resulting in the robot becoming high centered. Another drawback is that these magnets attract all the time which can make safely handling the robot challenging, especially in larger robots.
+Rare-earth neodymium magnets are extremely powerful and can provide a significant advantage to a robot. If used on the bottom of your bot to add downforce, the robot can have the pushing power of a much heavier robot with very little added mass.
-*Safety: The powerful magnets used in robot combat are not like the ones you've used to stick things to your refrigerator. They are very powerful and even the relatively small ones used in insect class robots can cause injury. While small magnets may cause painful pinches or small cuts the larger magnets are truly dangerous and special care must be used when working with them. The magnets can move suddenly and unexpectedly and can crush an unlucky hand that gets between them.
+===Safety===
-** Always be sure to clear away all materials that may attract a magnet.
+Even small, powerful magnets used in insect class robots can cause injury. The larger magnets are truly dangerous and special care must be used when working with them. The magnets can move suddenly and unexpectedly and can crush an unlucky hand that gets between them.
-** When possible, use a non-magnetic tool or jig to move and place the magnets.
+* Keep out of reach of children. Swallowed magnets can cause severe internal injuries.
-** If others will be close to or moving your robot, inform them of the dangers.
+* Always be sure to clear away all materials that may attract a magnet.
-** And above all use common sense. While sharp edges are obviously dangerous, the dangers of large magnets can be largely hidden and easy to forget.
+* When possible, use non-magnetic tools or jigs to move and place the magnets.
 =Electromagnets=
-A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are typically used intermittently, e.g. to hold the bot to the floor during an attack. Because of their weight and added design complexity, electromagnets are rarely used but can be useful when your design benefits from the magnetic forces being turned off.
+A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are typically used intermittently, e.g. to hold the bot to the floor at the moment of an attack. Because of their higher weight and added design complexity, electromagnets are rarely used, but they help to avoid the drawbacks listed above that may cause your bot to lose matches.

← Older revision		Revision as of 04:30, 24 November 2021
Line 18:		Line 18:

	=Electromagnets=		=Electromagnets=
−	A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are typically used intermittently, e.g. to hold the bot to the floor during an attack. Because of their weight and added design complexity, electromagnets are rarely used.	+	A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are typically used intermittently, e.g. to hold the bot to the floor during an attack. Because of their weight and added design complexity, electromagnets are rarely used but can be useful when your design benefits from the magnetic forces being turned off.

@@ Line 11: / Line 11: @@
 Rare-earth neodymium magnets are extremely powerful and can provide a significant advantage to a robot. If used on the bottom of your bot to add downforce the robot can have the pushing power of a much heavier robot. Also, with the increased down-force but no extra mass, robot acceleration can increase dramatically if the motors can provide the needed power. There are drawbacks to using permanent magnets. Loose debris in the arena can become attracted to them resulting in the robot becoming high centered. Another drawback is that these magnets attract all the time which can make safely handling the robot challenging, especially in larger robots.
-*Safety:
+*Safety: The powerful magnets used in robot combat are not like the ones you've used to stick things to your refrigerator. They are very powerful and even the relatively small ones used in insect class robots can cause injury. While small magnets may cause painful pinches or small cuts the larger magnets are truly dangerous and special care must be used when working with them. The magnets can move suddenly and unexpectedly and can crush an unlucky hand that gets between them.
 =Electromagnets=
 A simple coil of insulated wire around a suitable core material makes an electromagnet. Typically these require a lot of power and are typically used intermittently, e.g. to hold the bot to the floor during an attack. Because of their weight and added design complexity, electromagnets are rarely used.

← Older revision		Revision as of 03:13, 13 June 2021
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		+
		+	{{#ev:youtube\|https://youtu.be/T3ClqMd40Vw\|400\|right\|Two Magnet Assisted Bots Battle}}
	If permitted in the rules of the competition, magnets may be used in combat robots.		If permitted in the rules of the competition, magnets may be used in combat robots.
	*If the arena floor is a ferromagnetic material like iron or steel, you can increase the apparent weight of the bot by having it pull itself down with magnets, making it harder for other bots to lift, push, or flip. Remember that when deployed, this makes the drive motors work much harder!		*If the arena floor is a ferromagnetic material like iron or steel, you can increase the apparent weight of the bot by having it pull itself down with magnets, making it harder for other bots to lift, push, or flip. Remember that when deployed, this makes the drive motors work much harder!

@@ Line 1: / Line 1: @@
-{{#ev:youtube|https://youtu.be/T3ClqMd40Vw|400|right|Two Magnet Assisted Bots Battle}}
+{{#ev:youtube|https://youtu.be/T3ClqMd40Vw|350|right|Two Magnet Assisted Bots Battle|frame}}
 If permitted in the rules of the competition, magnets may be used in combat robots.
 *If the arena floor is a ferromagnetic material like iron or steel, you can increase the apparent weight of the bot by having it pull itself down with magnets, making it harder for other bots to lift, push, or flip. Remember that when deployed, this makes the drive motors work much harder!
@@ Line 6: / Line 7: @@
 [https://www.kjmagnetics.com/calculator.asp This calculator] may be useful for force estimates.
+<br><br>
 =Permanent magnets=
 Rare-earth magnets are among the most powerful. These attract all the time. If used on the bottom of your bot to add downforce, ensure that they will not come loose during the match.