HM-60A Brushless Speed Control (ESC)

[poobee]

Hay Guys,

At Less than $50 for this 60Amp Brushless Speed Control, I would think it was a great buy, if anyone has had some experance using this in a 1/10 rc car please let me know.

-Does it do the job?
-How are the breaks?
-Any other problems?

Cheers! :D

[e_lm_70]

Hi guys,

Finally today I have been able to use this ESC on my KX-One in a track.
Used a 3S Lipo and a 2825-2700 motor.
Set up was done some time ago, but I guess something got wrong on the last minute.
The brake function was off on my test for some reason.
The start is reasonably soft. The linearity of power is quite ok.
The 60amp did not have problem with my set up (final ratio was around 5.8), the top speed was not very high since timing was the lowest possible, the ESC at the end of the run was quite cool.
All in all it was quite ok ... not comparable with my well set up 11.30, but still an excdellent esc for less then 50$.

I did try again my Quark 33A, this time I did the precise set up before the run.
The braking power even if set to normal and just used 40% from my esc, it did result with a broken spoor gear after 2 laps ...

The Quark was pusshing much faster my car (better timing), the linearity on the quark was better then the 60amp, but the soft start was almost the same between the two esc

The Quark capable of just 33AMP cost around 79$ ...

So far I will rank my 3 ESC on same set up:
1st schulze 11.30 (65$ 2nd hand in ebay) (with big margin)
2nd 60amp (50$ new from ebay)
3rd quark 33a (79$ from rcmart)

Still to test the align 35amp for car ... need to find a new spoor

e_lm_70

[e_lm_70]

New update
again on track
Just made some laps with a proper set up of the Xpower 60amp.
Set 15deg timing & soft brake
The brake are quite nice and soft. Top speed have improved quite much.
after 5 min run The esc again get out cool while the motor is quite hot.
With the soft brake the esc behave like a autobrake enabled on a brushed esc ... clearly not hard breaking is not possible with this set up, but it is good for drive nicely on a track.

I did also quickly test the align 35, and the start and linearity are better the the xpower 60
And there is a real brake effect like standard car.
So it is close to the schulze the align for the car enviroment.
The esc afger 2min run get out already little bit warm ... clearly is more undedr stress then the 60amp esc

with a 3s Lipo set up ... I will say that align and xpower are decent esc for a 1:10 car!

e_lm_70

[poobee]

This Xpower 60amp you are talking of is it the same as the HM-60A?

cheers!

[e_lm_70]

Got my 60amp xpower from ebay (52$ shipped) and I belive is the same esc available at himodel for 47$.

Today my 11.30 with highest timing (my car was by far faster then a 17T car) did termal after 3min track time.
As well the Align (with far slower top speed) did termal after 3min track time.
So at the end the 60amp did the best of the track without any problem.

Just a note, this is a esc designed for airplane with a nice soft start, 4 brake set up possible, and a decent linearity ... but behing an airplane esc it expect a different input from the tx: there is just neutral (-100% signal) and full power (+100%), while every car esc, had full brake (-100%) neutral (0) and full power (+100). On my XS3 radio without any change I would have neutral from tx = 50% forward power), full power tx = full forward, and full brake tx = neutral .... In order to controll the car I did have to set throttle trim tp -125%, and set -60 on the throttle central adjustment via the additional trim ... only in this way I did achive to have a neutral tx that is consider neutral on the esc .... clearly with this set up on the tx, all the brake travel on the tx has no meaning a no different effect than keep the neutral position.

So this 60amp esc need an adjustable radio to be used ... or will be useless on a standard gun radio for car.

e_lm_70

PS: The 60amp esc has forder potential for more powerfull set up ... need to try is this esc can controll a c40 8s with standard 6 nimh set up

[glassdoctor]

So there is no brakes at all? Or does it have a "prop" brake that automaticly slows or stops the motor whenever the throttle is reduced?

I guess a prop brake is better than no brakes. That's a tricky way to drive...

[e_lm_70]

So there is no brakes at all? Or does it have a "prop" brake that automaticly slows or stops the motor whenever the throttle is reduced?

I guess a prop brake is better than no brakes. That's a tricky way to drive...

On my first run I guess I was having the set up for no brake (by mistake).

On the second run, I did properly set up soft brake.
The brake is the airplane esc type ... less throttle = esc force less RPM ... no throtte = esc force 0 rpm.

The soft brake was really soft ... similar to a autobrake setup in a brushed car ... was so soft that I never reduce speed going 50% throttle since it would have took to much time.

I should try with Middle Brake power ... it shoudl work better.

e_lm_70

P.S: My 2825-2700 was quite hot after 6 min run ... does this mean I was undergear ot overgear ?

P.S: It was not much tricky to drive, since it is similar to drive on a track with a brushed car without using brake ... that is the best technique for middle class motor type ...

[e_lm_70]

This Xpower 60amp you are talking of is it the same as the HM-60A?

cheers!

I did double check my manual and the Himodel online manual for the HM-60A ... the two maual are identical ... so yes they are the same ESC.

It would be nice to see a 80/100/120amp version of these esc for a same price ... it will be a killer also for 6 cell cars.

e_lm_70

[Rtsbasic]

Brilliant..I might just have to pick one up to run in my touring car when I don't want to take my Mtroniks out the truck. Thanks for reporting back on your testing. Does this ESC have the "safe start" thing a lot of plane ones do where you have to hold the brakes when turning it on before it'll power the motor?

Drag brakes that are about the same strength as a brushed motors brakes sounds good, prop brakes are the reason I haven't picked one up to try before but if they're not too bad I'm not really fussed.

A motor running too hot can mean both under/over geared, but normally overgeared. The motor your using isn't really going to give great performance in a car due to the low kv for the voltage your running.

Cheers.

[e_lm_70]

Yes the HM-60 ESC has the same airplane safety.
You need to have full brake on your TX when you power the esc, or it will not enter in running mode.
Anyhow you need to set in your tx that neutral is = full brake or it will not be possible to control the car. so not an issue.

2700 rpm/v & 11v it is about a 17T motor, so I geared like a 17T motor, around 5.8.
I guess the Himark 2825-2700 being a cheap airplane motor is not very efficient and also like to get good ventilation (like in a airplane)

e_lm_70

[Rtsbasic]

OK Thanks for explaining that. You may be better off with a Feigao 380 motor, they put up with a lot before you get heat problems. Apparently the most efficent point for a BL motor is about 40K RPM so even if you don't want really fast performance you could aim for this anyway and just gear differently to achieve the speed you want.

[poobee]

e_lm_70,

awwwww... please stop buying all the esc's from ebay, there are others who would like a go too. :( ... i want that 9920!!