20LikesOfficial Tekin RX8 GEN2 ESC Thread
03-31-2016 | 12:58 PM
#3286
A few things need to be done on your setup.
1. That Pigtail of wire needs to go bye bye. You want to have some slack in the wire length for chassis flex and normal movement, but not an extra large amount of wire that has to be curled up, especially if its just one wire and the rest are short. Having wires that are not similar in length creates an unbalanced load of resistance on the phases.
2. As mentioned in my earlier post, the 10 gauge wire is hard to solder properly and has no advantage over 12 gauge. Pictured is an example of how your soldering points need to be on both esc and motor with 12 gauge. A poor soldering job, can cause permanent damage to a unit..
1. That Pigtail of wire needs to go bye bye. You want to have some slack in the wire length for chassis flex and normal movement, but not an extra large amount of wire that has to be curled up, especially if its just one wire and the rest are short. Having wires that are not similar in length creates an unbalanced load of resistance on the phases.
2. As mentioned in my earlier post, the 10 gauge wire is hard to solder properly and has no advantage over 12 gauge. Pictured is an example of how your soldering points need to be on both esc and motor with 12 gauge. A poor soldering job, can cause permanent damage to a unit..
https://en.wikipedia.org/wiki/Skin_effect
there is another law that many do not take into consideration, sure ESC designers do, but there is a point were the gauge wire used becomes too large for the available power source resulting in conductivity losses. called called MHO's law also referred to Siemens. i once saw a racer wire up a car with speaker monster wire.
the next big thing RC cars still hasn't occured, is the use on "litz" wire for stators or armatures of years passed. not sure they ever will, in other hobbies it is permanently banned.
litz wire is multistrand arm/stator wire...from wiki
"The wire is designed to reduce the skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz.[1] It consists of many thin wire strands, individually insulated and twisted or woven together, following one of several carefully prescribed patterns[2] often involving several levels (groups of twisted wires are twisted together, etc.). This winding pattern equalizes the proportion of the overall length over which each strand is at the outside of the conductor. "
03-31-2016 | 01:26 PM
#3287
got my tekin hotwire unit yesterday, all i can say...I WAS WAY THE HELL OFF when it came to attempting manually program it. one example i thought i was in DB setting 2 after programming from the 4-5 fact setting, i was in 6. which explains the severe nose dive on jumps when i let off the throttle. 4-5 was too high to begin with, i made it worse.
highly recommend not skimping on getting one and the small cable
anyone know where one can get a phone to phone cable?
TKW has a phone input, i want to use my phone when i'm at the track to make changes, and not have to pack a laptop
highly recommend not skimping on getting one and the small cable
anyone know where one can get a phone to phone cable?
TKW has a phone input, i want to use my phone when i'm at the track to make changes, and not have to pack a laptop
http://www.amazon.com/Lindy-0-5m-USB...indy+otg+cable
03-31-2016 | 03:58 PM
#3289
03-31-2016 | 07:15 PM
#3290
multistrand wire actually passes more current and voltage for RC cars. 1/24 slotcar road course racers and drag racers (even when no movement is needed) use it for the same reason. more strands the better, the more surface area you gain over a solid conductor the same gauge
https://en.wikipedia.org/wiki/Skin_effect
there is another law that many do not take into consideration, sure ESC designers do, but there is a point were the gauge wire used becomes too large for the available power source resulting in conductivity losses. called called MHO's law also referred to Siemens. i once saw a racer wire up a car with speaker monster wire.
the next big thing RC cars still hasn't occured, is the use on "litz" wire for stators or armatures of years passed. not sure they ever will, in other hobbies it is permanently banned.
litz wire is multistrand arm/stator wire...from wiki
"The wire is designed to reduce the skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz.[1] It consists of many thin wire strands, individually insulated and twisted or woven together, following one of several carefully prescribed patterns[2] often involving several levels (groups of twisted wires are twisted together, etc.). This winding pattern equalizes the proportion of the overall length over which each strand is at the outside of the conductor. "
https://en.wikipedia.org/wiki/Skin_effect
there is another law that many do not take into consideration, sure ESC designers do, but there is a point were the gauge wire used becomes too large for the available power source resulting in conductivity losses. called called MHO's law also referred to Siemens. i once saw a racer wire up a car with speaker monster wire.
the next big thing RC cars still hasn't occured, is the use on "litz" wire for stators or armatures of years passed. not sure they ever will, in other hobbies it is permanently banned.
litz wire is multistrand arm/stator wire...from wiki
"The wire is designed to reduce the skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz.[1] It consists of many thin wire strands, individually insulated and twisted or woven together, following one of several carefully prescribed patterns[2] often involving several levels (groups of twisted wires are twisted together, etc.). This winding pattern equalizes the proportion of the overall length over which each strand is at the outside of the conductor. "
"The strands must be insulated from each other—otherwise all the wires in the bundle would short together, behave like a single large wire, and still have skin effect problems."
Seems to say there is no benefit (toward reducing skin effect) of the miltistranding in the wire we use for RCs because the strands aren't insulated from one another.
Then again, we are not operating at the kind of frequencies where the skin effect is real significant (4 pole RC motor at 40K RPM is only 8,000 Hz).
03-31-2016 | 09:34 PM
#3291
Tech Adept
iTrader: (2)
Joined: Jan 2016
Posts: 200
From: Steamboat Springs, Colorado
Could someone please answer a question, on the RX8 Gen 2, when you choose you LV cutoff, you can choose a specific number, i.e. 3.4v for a 3s pack
Is this number per cell or pack voltage, like should it be 10.2v instead of 3.4v for my 3s pack?
I have it a 3.4v right now, but LOL I definitely don't want to take my whole pack to 3.4v
Is this number per cell or pack voltage, like should it be 10.2v instead of 3.4v for my 3s pack?
I have it a 3.4v right now, but LOL I definitely don't want to take my whole pack to 3.4v
04-01-2016 | 08:53 AM
#3293
Could someone please answer a question, on the RX8 Gen 2, when you choose you LV cutoff, you can choose a specific number, i.e. 3.4v for a 3s pack
Is this number per cell or pack voltage, like should it be 10.2v instead of 3.4v for my 3s pack?
I have it a 3.4v right now, but LOL I definitely don't want to take my whole pack to 3.4v
Is this number per cell or pack voltage, like should it be 10.2v instead of 3.4v for my 3s pack?
I have it a 3.4v right now, but LOL I definitely don't want to take my whole pack to 3.4v
04-01-2016 | 12:11 PM
#3294
I'm assumimg your phone has a micro usb port....
http://www.amazon.com/Lindy-0-5m-USB...indy+otg+cable
http://www.amazon.com/Lindy-0-5m-USB...indy+otg+cable
04-01-2016 | 12:49 PM
#3295
Did you read this part in the in the Wikipedia article on Litz wire (second sentence in 5th paragraph under "Skin effect"):
"The strands must be insulated from each other—otherwise all the wires in the bundle would short together, behave like a single large wire, and still have skin effect problems."
Seems to say there is no benefit (toward reducing skin effect) of the miltistranding in the wire we use for RCs because the strands aren't insulated from one another.
Then again, we are not operating at the kind of frequencies where the skin effect is real significant (4 pole RC motor at 40K RPM is only 8,000 Hz).
"The strands must be insulated from each other—otherwise all the wires in the bundle would short together, behave like a single large wire, and still have skin effect problems."
Seems to say there is no benefit (toward reducing skin effect) of the miltistranding in the wire we use for RCs because the strands aren't insulated from one another.
Then again, we are not operating at the kind of frequencies where the skin effect is real significant (4 pole RC motor at 40K RPM is only 8,000 Hz).
Litz equivalent wire vs equal solid gauge armature wire was tested. litz ran faster, cooler, and armature arm-meter measurements were better than solid gauge. using it would have caused a cost jump in arms/motors, and mass outdate current equipment used. teching would have also been a issue. so it was perma banned and vote blocked....forever
04-03-2016 | 05:28 AM
#3298