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Thread: I want to bump my Servo Voltage to the max

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Old 01-16-2010, 06:03 PM   #1
Rock Crawler
 
Join Date: Aug 2008
Location: maple ridge
Posts: 627
Default I want to bump my Servo Voltage to the max

I have the CC bec and i want to turn it up to power the servo at its max voltage rating (the servo's)

Is this safe? and is this how your wupposed to wire it?



is there any negative side effects of this or will i have the retarded servo power i'm looking for.

i'm using a JR z9100t servo.

spec:
JR Z9100T Digital Ultra Hi-Torque Surface Servo (Metal Gear)
[JRPSZ9100T] MAP Price: $139.99

This is the JR Z9100T Digital Ultra Hi-Torque Surface Servo. Monster truck owners in need of the greatest steering power possible will love the Z9100T Ultra Torque servo. With the same case size as the 9000 series, it's an easy upgrade, and the red anodized aluminum heat sink case keeps things cool in demanding conditions.


Features
  • Extreme torque perfect for large vehicles
  • Fast transit time assures responsive feel
  • Metal mid case for heat dissipation
  • High frequency digital electronics for greater power, reliability
  • Customized electronics specifically for surface use
  • Metal gears for reliability
Specifications:

Type: Ultra High-Torque Digital Servo
Torque: 300 oz/in @ 4.8V, 370 oz/in @ 6V
Speed: .18 sec / 60 degrees @ 4.8V, .15 sec / 60 degrees @ 6V
Dimensions: 0.83" x 1.59" x 1.57"
Weight: 2.3 oz
Gears: Metal Gears
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Old 01-16-2010, 06:09 PM   #2
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wires look right but can you get a servo that is about the same performance but cheeper? like hobbico cs170 333 oz of torque at 6.0 volts titanium gears and only 90 bucks TCS crawlers.
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Old 01-16-2010, 06:10 PM   #3
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you batt. will go dead with the bec on that side of the plug.
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Old 01-16-2010, 06:12 PM   #4
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i already own the servo.

can i go over the factory spec say bump it up to 6.5V?

or do i even need to wire it liek this at only 6V I'm running a JR300 receiver. do you think that woudl be able to handle the 6v?
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Old 01-16-2010, 06:13 PM   #5
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ya i noticed that. This image is robbed from another thread. i wont be hardwiring the BEC into the bat...especially since its only a 1300mHa and i have 3 of them.....
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Old 01-16-2010, 06:17 PM   #6
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I don't know about going over factory voltage spec. You might let the smoke out of your servo. I would not do it . can you change anything else on your rig to get more turning power ????? like take out a high steering kit or go with a behind the axel steering kit so the linkadge moves the tires from a more centered point on the axel
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Old 01-16-2010, 06:18 PM   #7
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I'm running 6.3v through a futaba reciever and so far so good. Wiring direct to the servo would eliminate the possible risk of damaging your rx, but I think if you max out the voltage you will need to upgrade the wire to the servo. If you don't, you could have a melt down.
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Old 01-16-2010, 06:23 PM   #8
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i can't change the steering because the rig isn't built yet. i have a shafty i compete with and i'm waiting on the new chassis. i want this bully to be 100% what i want right out of the box.

i think i will contact JR to see what they think of this. I don't want to void the warranty on the servo but i want the best steering i can get.
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Old 01-16-2010, 07:04 PM   #9
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JR makes HV servos that run on 7.4 2s direct lipo. I have run their 8711 in my heli at 7v no problem over a year till I got the HV versions.
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Old 01-16-2010, 08:01 PM   #10
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my 8711 stays cool at 6.2 and i've been thinking of bumping it up. just go a little at a time and feel for heat.
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Old 01-16-2010, 09:26 PM   #11
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I've been running an 8711 at 7volts for well over a year and have had zero problems with it.
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Old 01-16-2010, 11:06 PM   #12
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how much more power do you guys notice with the higher voltage?
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Old 01-17-2010, 12:51 AM   #13
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if your wanting to run higher voltage to the servo, get a high voltage servo thats designed for 7.4 volts. now im not 100% sure, however wit ha 7.4 volt servo you may be able to wire it directly to a 2s pack, and that would supply 8.4 volts at full charge. i would check with the manuacturer first though.

fwiw, nitro stuff has used 5 cell packs to power the radios for years. 5 cells is 6 volts nominal, however 6.75-7 volts is normal for a fully charged pack, and running normal servos rated for 4.8/6 volts, ive never heard of anyone having an issue.
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Old 04-21-2010, 11:16 AM   #14
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Quote:
Originally Posted by Kraqa View Post
I have the CC bec and i want to turn it up to power the servo at its max voltage rating (the servo's)

Is this safe? and is this how your wupposed to wire it?



is there any negative side effects of this or will i have the retarded servo power i'm looking for.

i'm using a JR z9100t servo.

spec:
JR Z9100T Digital Ultra Hi-Torque Surface Servo (Metal Gear)
[JRPSZ9100T] MAP Price: $139.99

This is the JR Z9100T Digital Ultra Hi-Torque Surface Servo. Monster truck owners in need of the greatest steering power possible will love the Z9100T Ultra Torque servo. With the same case size as the 9000 series, it's an easy upgrade, and the red anodized aluminum heat sink case keeps things cool in demanding conditions.


Features
  • Extreme torque perfect for large vehicles
  • Fast transit time assures responsive feel
  • Metal mid case for heat dissipation
  • High frequency digital electronics for greater power, reliability
  • Customized electronics specifically for surface use
  • Metal gears for reliability
Specifications:

Type: Ultra High-Torque Digital Servo
Torque: 300 oz/in @ 4.8V, 370 oz/in @ 6V
Speed: .18 sec / 60 degrees @ 4.8V, .15 sec / 60 degrees @ 6V
Dimensions: 0.83" x 1.59" x 1.57"
Weight: 2.3 oz
Gears: Metal Gears
I realize that this is an old thread, but I had an FXR and a CC Bec die recently from this wiring and the tech at Castle said that you have a ground potential problem with this wiring set up, and that eventually something will burn up. In my case, both the ESC and the BEC did.

He said that you should run the wiring the way it is shown on the BEC card that is included with the BEC. He said most rx's will handle the 7.4v without a problem.
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Old 04-23-2010, 10:26 PM   #15
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8711 same price and has 403 tq @ 6 v
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