Hobbywing Quicrun Waterproof 1080 Brushed Crawling ESC

[Hardcoretam]

Originally Posted by coffeeaddict17

I see that the 1080 has an adjustable BEC. I'm planning to run the PM servo at 6v which should yield plenty for the 1.55s on the tf2. Are you guys finding that the 1080 BEC works well enough to not need an external BEC?

I've ran mines with weighted 2.2's on 3s on an all metal SCX10 with heavyweight axles and a Power HD 23KG servo (approx 320oz torque @ 6v) and no issues at all. ESC is always cold to the touch

Originally Posted by IVIaarten

If you're running on 2S it's strong enough for sure. I think if you run 3S it will supply less Amps to the servo, so then you might need one.

Is that true? I thought that was only the case with linear BECs not switching type BECs like the 1080 has

[Ditchrat]

Originally Posted by Hardcoretam

Is that true? I thought that was only the case with linear BECs not switching type BECs like the 1080 has

Yes it is true
Amp x volts=watts.

Watts is the expression of power needed to complete work. The work hasnt changed so to balance the equation the Amps used must decrease.

But that doesnt mean anything so long as the Amp x volts meets or exceeds the wattage needed to opperate your servo.




Sent from my SM-G928V using Tapatalk

[Hardcoretam]

Originally Posted by Ditchrat

Yes it is true
Amp x volts=watts.

Watts is the expression of power needed to complete work. The work hasnt changed so to balance the equation the Amps used must decrease.

But that doesnt mean anything so long as the Amp x volts meets or exceeds the wattage needed to opperate your servo.




Sent from my SM-G928V using Tapatalk

Yes, from my understanding of that it means the servo draws less amps, but i was pointing out that shouldn't reduce the output capability of the built in BEC. It should be able to provide 3amps regardless if it's a 3s or 2s lipo on the input.

[IVIaarten]

Originally Posted by Hardcoretam

Yes, from my understanding of that it means the servo draws less amps, but i was pointing out that shouldn't reduce the output capability of the built in BEC. It should be able to provide 3amps regardless if it's a 3s or 2s lipo on the input.

It will not provide the same Amps, it will provide the same power (Watts).
Since with 3S you're increasing the Volts, the supplied Amps go down for the same Wattage.
It's the maximum power draw (the Watts) being limited by heat, which is what kills components.

[Hardcoretam]

I'm still confused.

I was in the understanding that regardless if it's 2s or 3s input on on the 1080, the BEC output was either 6v 3a regardless.
It has a switching type BEC so it doesn't convert the higher voltage to a lower voltage by heat. That's liniar BECs

[IVIaarten]

Originally Posted by Hardcoretam

I'm still confused.

I was in the understanding that regardless if it's 2s or 3s input on on the 1080, the BEC output was either 6v 3a regardless.
It has a switching type BEC so it doesn't convert the higher voltage to a lower voltage by heat. That's liniar BECs

I mean, I could be wrong. Was pretty sure I read it in the manual, but can't find it right now.
Regardless, I still think it power draw that's the limiting factor. Switching in general generates heat as well (main problem for mosfets). Not 100% sure though, since I don't know enough about wrangling angry pixies (electricity) to explain it clearly.

[Ninomaniac]

Depends on the circuit. It could be limited by either. Only Hobbywing engineers know...

[TWS]

Has anyone tried this esc on a dual 35t motor setup and a 400oz servo on 3s?

[JatoTheRipper]

Originally Posted by TWS

Has anyone tried this esc on a dual 35t motor setup and a 400oz servo on 3s?

I'm not sure it would hold up to dual 35Ts. HobbyWing has a dual motor ESC: https://www.hobbywingdirect.com/prod...iant=901661765

[TWS]

the dual one says BEC Output 3A/5V (Switch Mode) :(

[Hardcoretam]

Originally Posted by JatoTheRipper

I'm not sure it would hold up to dual 35Ts. HobbyWing has a dual motor ESC: https://www.hobbywingdirect.com/prod...iant=901661765

It should easily manage 2 x 35t's. I ran a 17t on mines with 3s and it didn't even get warm

[JatoTheRipper]

Originally Posted by Hardcoretam

It should easily manage 2 x 35t's. I ran a 17t on mines with 3s and it didn't even get warm

The specs for the 1080 say:

Brushed Motors
540/550/775 Series
2S LiPo or 6S NiMH: ≥10T or\RPM<30000@7.4V

3S LiPo or 9S NiMH: ≥16T or RPM<20000@7.4V

I believe that means it can support two 20T motors on 2S. So if that's correct than two 35T's shouldn't be an issue.

[Ditchrat]

Originally Posted by Hardcoretam

I'm still confused.

I was in the understanding that regardless if it's 2s or 3s input on on the 1080, the BEC output was either 6v 3a regardless.
It has a switching type BEC so it doesn't convert the higher voltage to a lower voltage by heat. That's liniar BECs

Yes the exact reason a switching regulator is used. Switching regulator is also called a Buck converter. What they do is turn the flow of voltage on and off as needed. Ill do my best here. In simplest terms the regulator goes on, lets some voltage through but at the same time cause an inductor to create a magnetic field. It then turns off and the magnetic field then becomes the current that is operating the output device.

Let me put it this way, you want to fill a pool at a rate of 6 gal per minute but only have a hose that delivers 12 gal per minute. You only want 6 gal per minute. You split the hose and put 6 gal per minute into a bucket and 6 gal per minute into the pool.

You then turn of the hose at the same time you open a valve from the bucket. Once the buckets empty you turn on the hose again.

It all happens so fast that there is not interruption in the fill rate.

So your switching bec is about 90% (often more)efficient. Unlike a linier that burns up the extra as heat, the switching loses some(to heat)from the creation and dissipation of the magnetic field.

Now back to your 2s vs 3s. If your BEC out put is 6V@3A the your wattage is 18 watts.

Using 2s your voltage is 7.4 so 7.4(Amps)=18 your input Amp should be 2.4

Using 3s your voltage is 11.1 so 11.1(amps)=18 your input Amp should be 1.6

None of that considers the heat loss.


Now your BEC will put out a maximum of 6V@3A, regardless of what your input is(so long as it is more then the output).

The actually out put of your BEC completely depends on what the device you are powering is asking for. If you have a 6v LED that draws 20mA then that's all that is coming out of the BEC.

The only time the output voltage drops is when the demand exceeds the amps available.

Amp is the volume of energy being used, voltage is the pressure in which it is supplied. (not exactly accurate but the commonly accept analogy)

Hope this helps some.

[Hardcoretam]

Originally Posted by JatoTheRipper

The specs for the 1080 say:

Brushed Motors
540/550/775 Series
2S LiPo or 6S NiMH: ≥10T or\RPM<30000@7.4V

3S LiPo or 9S NiMH: ≥16T or RPM<20000@7.4V

I believe that means it can support two 20T motors on 2S. So if that's correct than two 35T's shouldn't be an issue.

The motor limit is often just a guide as one 20t motor will differ to another in terms of amps pulled etc. The ESC can deliver 80amps continuous apparanrtlty where as the TRX-4 can power a 21t Titan 550 motor on 3s easily on an ESC that can only deliver 18amps continuous so if a Titan 21t on 3s doesn;t use anywhere near 18amp continous you could in theory run 4 off the ESC and have no problems if geared correctly.

Originally Posted by Ditchrat

Hope this helps some.

Great information and explanation. Thank you.

[RockyMtn]

Does anyone has feedback with a Holmes Crawlmaster 16T or 13T?

Regarding the specs above, this little boy handle:
2S LiPo or 6S NiMH: ≥10T or\RPM<30000@7.4V
3S LiPo or 9S NiMH: ≥16T or RPM<20000@7.4V

I run it with and oldy bu trusty Novak Rockstar 35T; it work fine. I made a G6 and won a local comp' with it but now it is time for a "fresh" motor. Right now I use 2s battery but I keep in mind, in a close futur, to use 3S.
So basicaly, a 16T should be the motor to choose.

Thanks!

[Jboucher]

If im not mistaken the crawlmaster is a 5-slot motor so the turn count cannot be compared directly with 3-slot motors like the Traxxas Titan line-up.

Maybe John himself will jump in to explain but it's been posted on this forum before.

Sent from my Nexus 6 using Tapatalk

[slowmethinks]

I run the Crawlmaster Pro 13T and 1080 in my SCX10.2. Zero issues with heat, etc. It's nice and smooth. Plenty of Torque and wheel speed, but not too fast.

Jboucher is correct. It's a 5 slot motor so it's speed isn't equivalent to typical turns.

From RPPHobby:

All Kv (rpm per volt) measurements taken at zero timing, no load, and 7 volts:
11t = 2675Kv
13t = 2250Kv
16t = 1850Kv
20t = 1500Kv

[RockyMtn]

Originally Posted by Jboucher

If im not mistaken the crawlmaster is a 5-slot motor so the turn count cannot be compared directly with 3-slot motors like the Traxxas Titan line-up.

Maybe John himself will jump in to explain but it's been posted on this forum before.

Sent from my Nexus 6 using Tapatalk

Originally Posted by slowmethinks

I run the Crawlmaster Pro 13T and 1080 in my SCX10.2. Zero issues with heat, etc. It's nice and smooth. Plenty of Torque and wheel speed, but not too fast.

Jboucher is correct. It's a 5 slot motor so it's speed isn't equivalent to typical turns.

From RPPHobby:

All Kv (rpm per volt) measurements taken at zero timing, no load, and 7 volts:
11t = 2675Kv
13t = 2250Kv
16t = 1850Kv
20t = 1500Kv

Thanks for your repplies guys!

[JatoTheRipper]

FYI HobbyWing Direct is having a sale. Use the code TIME2GIVE17 to get the WP 1080 for $35.69 shipped! I picked up two last night.

The coupon code applies on everything.

https://www.hobbywingdirect.com

[smog]

Originally Posted by JatoTheRipper

FYI HobbyWing Direct is having a sale. Use the code TIME2GIVE17 to get the WP 1080 for $35.69 shipped! I picked up two last night.

The coupon code applies on everything.

https://www.hobbywingdirect.com

Cool, thanks for pointing it out. Are their brushed motors decent quality?