Battery R/c - Motor Buzzing

PhilP

PhilP

G Scale, 7/8th's, Electronics
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All,
Have a battery R/C loco here, with a Viper Micro Rail ESC fitted..
I am not familiar with this ESC. When powered up (charge/off/run switch) the motor is silent.. Once you start it moving the motor buzzes (whistles). - I presume this is due to the PWM output of the ESC ??

Is anyone familiar with this ESC at all?

I have been asked to replace the (stick-type) R/C with a Revolution. Am loath to do this if it a case of the wrong type of motor which is the problem.

TIA,
PhilP.
 
I have a micro viper running a como motor - quiet as a mouse.

I use El Cheapo Saturn R/C (4 channel) and the whole set up is very well behaved.

What motor is in the beast? Micro Viper do recommend that you fit two ballast capacitors on the motor.
 
Do you want a scan of the Micro Viper instructions (if I can find them)?
 
I run these ESCs in an old Playmobil diesel and a Stainz without additional capacitors and without problems.
 
What motor is the Viper trying to run Phil. The Buhler motor from the Stainz (and the Como) is a big, quality and maybe it can absorb the pulse better.
 
I have the same issue with one of my battery powered locos - Piko Mogul

Viper 10 ESC and Deltang 102 reciever.

Buzzing noise at low speeds which disappears when I turn up the power.

My guess is the motor wants more Amps than is being supplied.

No issue with my Bachmann Thomas with the same ESC and reciever.

Any ideas?
 
If you can scan the instructions, or point me at them online, that would be brilliant.

I will try to identify the motor. - Babysitting ATM..

It could be a GRS 'metal box' diesel?? Fairly basic, but a cracking paint finish.


Could it be the batteries need charging?? - I have chassis, cab, pile of nuts and bolts, RX, ESC, and the transmitter! - No instructions, no charger..
 
The frequency of the PWM effects different motors differently. Some DCC systems allow for the frequency to be varied to match the motor more closely.
 
stockers said:
The frequency of the PWM effects different motors differently. Some DCC systems allow for the frequency to be varied to match the motor more closely.
Click to expand...

I have heard of problems with the type of motor fitted?? - Different ESC's for ?brushless? motors?? - Don't know enough about that type of thing.
 
Brushless motors is another ball-park altogether. I understand that they need electronics to make them work, seeing as how they dont have brushes. What PWM would do to that I have no idea.
 
stockers said:
Brushless motors is another ball-park altogether. I understand that they need electronics to make them work, seeing as how they dont have brushes. What PWM would do to that I have no idea.
Click to expand...

Thought it might be a red-herring..
 
PhilP said:
I have heard of problems with the type of motor fitted?? - Different ESC's for ?brushless? motors?? - Don't know enough about that type of thing.
Click to expand...

Don't think so - most brushless motors that I have seen for our scale have three leads, and you would struggle to connect to an ordinary ESC.

I'll scan the scanty instructions for the Viper.

GRS show some reasonably beefy motors for their chassis and gearbox in their catalogue - doubt they've used a tin can.

Can't be cured by a minute drop of oil on the bearings that don't need oiling ??
 
PhilP said:
All,
Have a battery R/C loco here, with a Viper Micro Rail ESC fitted..
I am not familiar with this ESC. When powered up (charge/off/run switch) the motor is silent.. Once you start it moving the motor buzzes (whistles). - I presume this is due to the PWM output of the ESC ??

Is anyone familiar with this ESC at all?

I have been asked to replace the (stick-type) R/C with a Revolution. Am loath to do this if it a case of the wrong type of motor which is the problem.

TIA,
PhilP.
Click to expand...

I've got a Viper Esc fitted to my Baguley. It also hums when you start moving, but hasn't caused any issues and runs absolutely fine.
 
Seems to run OK.. Very basically wired..
No fuse. Light comes on forwards as motor voltage comes up. Basic metal outline kit. - Though I have no idea of manufacturer.

DSC00965-1.jpg

This is how it came to me..
No hood. Front grill (with light) hanging by wire..
Cab is held by one loose nut and bolt..
Five nuts and bolts loose in the cardboard box..

Looks like you have to fix the hood to the chassis first. Then push-fit the grill into the front. Bolt down this part, then the cab.
 
Micro Viper ESC-001.jpg


Loco looks like IP Engineering.

Here's the micro-viper instructions - can't work out how to send a PM at the moment.
 
If it's not IP, then Kent Garden Railways used to sell a very similar 6-coupled loco - I think they only do the chassis now.
 
Hi
Viper pulse width modulation is at low frequency 1 kHz. Use a RX65 from Micron Radio Control. It is for DSM2 2.4GHz transmitters and its pulse width modulation is 12 kHz

Alan
 
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