RC India
Welcome Guest, please login or register.
 
Pages: [1]   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: October 18, 2012, 10:45:16 AM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011




This thread is just to warn all the DIY multirotor freaks here that simonK ESCs and NTM Prop drive 2826 motors don't make a good combination. (I think RcTimer has similar motors which should be incompatible as well).

Many people have experienced problems AND Simon Kirby himself made it clear (see the second post in this page) that it's a bad combo.
He suggested to use Wii-ESC firmware instead; someone tried it and was succesful.

Now I wonder how to convert my Simonk ESCs to Wii-ESCs.. Can anyone help? Grin
« Last Edit: October 18, 2012, 12:45:23 PM by anwar » Logged
 

Read
« Reply #1 on: October 18, 2012, 10:46:27 AM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011



Oops. It's a typo: The topic should read NTM 2826 motors, not MTM. I request an admin to kindly correct it.
Logged
 

Read
« Reply #2 on: October 18, 2012, 11:18:03 AM »
abhilash_172
Plane Lover
Active Member
**

Reputation Power: 1 
abhilash_172 has no influence.
Offline Offline

City: hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 44
Join Date: Jun, 2012



@hyd_quads,why are you changing your esc firmware?does it make any significant increase in response?i think by adding magnetometer to 6 dof will make quad ultrastable.correct me if i am wrong.
Logged
 

Read
« Reply #3 on: October 18, 2012, 11:20:25 AM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011



The firmware is changed to increase the throttle refresh rate which is one of the prime steps twoards making a quad more stable. The stock firmware has some kind of a PWM filter which makes it slow (remember the board is 8 bit). SimonK firmware significantly increases the throttle refresh rate to around 450Hz.
A magnetometer is used for fixing the Z-orientation of the quad. How does it make the quad stable?

Vineet
Logged
 

Read
« Reply #4 on: October 18, 2012, 11:22:42 AM »
abhilash_172
Plane Lover
Active Member
**

Reputation Power: 1 
abhilash_172 has no influence.
Offline Offline

City: hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 44
Join Date: Jun, 2012



what about I2C esc's?
Logged
 

Read
« Reply #5 on: October 18, 2012, 11:27:14 AM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011



They have a very high refersh rate. BUt they can't be used with the standard FCs. Ask any MikroKopter guy you know to get more info.
Logged
 

Read
« Reply #6 on: October 18, 2012, 11:46:53 AM »
abhilash_172
Plane Lover
Active Member
**

Reputation Power: 1 
abhilash_172 has no influence.
Offline Offline

City: hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 44
Join Date: Jun, 2012



gyro drift can be reduced by adding gps or magnetometer.i think refresh rate also depends on code frequency(pid loops).higher the frequency,response will be good
http://airhacks.org/?p=37
@hyd_quads,don't think otherwise,i am not arguing,i just wanted to know about simonk firmware.
Logged
 

Read
« Reply #7 on: October 18, 2012, 11:48:38 AM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011



@hyd_quads,don't think otherwise,i am not arguing,i just wanted to know about simonk firmware.

Hehe, I know that.
And what pid loops? We ain't talking about the FC's frequency here, but the ESC's throttle refresh rate.
Logged
 

Read
« Reply #8 on: October 18, 2012, 11:55:53 AM »
abhilash_172
Plane Lover
Active Member
**

Reputation Power: 1 
abhilash_172 has no influence.
Offline Offline

City: hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 44
Join Date: Jun, 2012



if pid loop frequency is high,say about 100 hz,motor commands will also be updated about 100hz,i am saying this thing ,not crystal frequency on FC.
Logged
 

Read
« Reply #9 on: October 18, 2012, 12:06:20 PM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011



You see, our motors are not connected to the FC directly. Even if the FC updates the ESCs at a good rate, the ESCs with stock firmware update the throttle very slowly. These f/ws are for improving the refresh rate on the ESC's side, not the FC's...
Logged
 

Read
« Reply #10 on: October 18, 2012, 12:25:38 PM »
abhilash_172
Plane Lover
Active Member
**

Reputation Power: 1 
abhilash_172 has no influence.
Offline Offline

City: hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 44
Join Date: Jun, 2012



@hyd_quads yeah,what you are saying is correct.
Logged
 

Read
« Reply #11 on: October 20, 2012, 08:16:42 PM »
hyd_quads
Plane Lover
Forum Hero
*****

Reputation Power: 9 
hyd_quads has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 761
Join Date: Sep, 2011



AN IMPORTANT UPDATE

SimonK's 2012-09-30 release fixes the issue of incompatibility. So go ahead, flash your ESCs with SimonK's latest fw and use them on your NTMs.
 
Cheers!
Vineet
Logged
 

Pages: [1]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Hobby king's new SIMONK ESCs
Electric Power
santhosh-r 5 4344 Last post July 02, 2013, 09:57:56 PM
by RCNeil21
SimonK ESCs at Rcbharat
Multirotors
RcBharat 0 2810 Last post July 02, 2013, 11:30:38 PM
by RcBharat
ESC Comparison ( MULTIROTOR) EMAX simonK 30 Amp VS AFRO 30 Amp simonK...
Multirotors
roshan.dixit 2 3717 Last post July 21, 2014, 07:03:29 PM
by roby
Simonk 30a escs for quadcopters
For Sale
Ribz 6 3213 Last post February 26, 2015, 09:13:36 AM
by Ribz
4* 2826 1400 kv motors emp on sale
For Sale
kshitij saa 0 1120 Last post August 07, 2015, 05:07:03 PM
by kshitij saa