Go to Post As mentors we need to be good role models for students. Because like it or not, we will be role models. - mathking [more]
Home
Go Back   Chief Delphi > Technical > Programming
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 09-02-2011, 13:30
bladetech932's Avatar
bladetech932 bladetech932 is offline
Programmer of awesome
AKA: Jon
FRC #0932 (Circuit Chargers)
Team Role: College Student
 
Join Date: May 2009
Rookie Year: 2009
Location: Tulsa
Posts: 242
bladetech932 is on a distinguished road
Victor Syncing

Would it possible to use a Y cable in order to get two Victors to run at the same time at the exact same speed?

If not how could i do that in LabVIEW?
__________________
Expect the best, Prepare for the worst
  #2   Spotlight this post!  
Unread 09-02-2011, 13:38
Dale's Avatar
Dale Dale is offline
Head Coach & Mentor
AKA: Dale Yocum
FRC #1540 (Flaming Chickens)
Team Role: Coach
 
Join Date: Feb 2005
Rookie Year: 2005
Location: Portland, OR
Posts: 504
Dale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud of
Re: Victor Syncing

Sure, you can even buy those Y cables. Of course the motors and transmissions themselves may run at slightly different speeds to don't expect that to solve all of your problems. It does make life slightly easier for the programmers, though.
__________________
2016 PNW Championship Chairman's; 2016 Winner Oregon City District, 2015 PNW Championship Chairman's; 2015 PNW District Engineering Inspiration; 2015 PNW District Finalist; 2014 PNW Championship Chairman's; 2014 Championship Innovation in Controls; 2013 Chairman's (Oregon); 2013 Finalist (OKC); 2012 Winner (OKC); 2012 Chairman's (OKC); 2012 Woody Flowers (Oregon); 2011 Volunteer of the Year (Oregon); 2011 Finalist & Captain (San Diego); 2011 Innovation in Control (San Diego); 2010 & 2007 Chairman's (Oregon); 2010 Regional Champions (Colorado); 2010 Innovation in Control (Colorado); 2009 & 2008 Engineering Inspiration (Oregon); 2008 Regional Champions (Oregon); 2007 Regional Finalist (Oregon); 2005 Rookie Inspiration (PNW)
  #3   Spotlight this post!  
Unread 09-02-2011, 14:03
bladetech932's Avatar
bladetech932 bladetech932 is offline
Programmer of awesome
AKA: Jon
FRC #0932 (Circuit Chargers)
Team Role: College Student
 
Join Date: May 2009
Rookie Year: 2009
Location: Tulsa
Posts: 242
bladetech932 is on a distinguished road
Re: Victor Syncing

Quote:
Originally Posted by Dale View Post
Sure, you can even buy those Y cables. Of course the motors and transmissions themselves may run at slightly different speeds to don't expect that to solve all of your problems. It does make life slightly easier for the programmers, though.
I have a couple of them, but what else can i do to get the motors as close as posible to synced?
__________________
Expect the best, Prepare for the worst
  #4   Spotlight this post!  
Unread 09-02-2011, 14:10
Dale's Avatar
Dale Dale is offline
Head Coach & Mentor
AKA: Dale Yocum
FRC #1540 (Flaming Chickens)
Team Role: Coach
 
Join Date: Feb 2005
Rookie Year: 2005
Location: Portland, OR
Posts: 504
Dale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud ofDale has much to be proud of
Re: Victor Syncing

What we do is measure the speed of each wheel with a tachometer and then adjust the relative speed in software. If you don't have a tach, you could just use the good old fashion guess-and-try method.

All this assumes you've broken in your transmissions and reduced friction in the drive train as much as you can.
__________________
2016 PNW Championship Chairman's; 2016 Winner Oregon City District, 2015 PNW Championship Chairman's; 2015 PNW District Engineering Inspiration; 2015 PNW District Finalist; 2014 PNW Championship Chairman's; 2014 Championship Innovation in Controls; 2013 Chairman's (Oregon); 2013 Finalist (OKC); 2012 Winner (OKC); 2012 Chairman's (OKC); 2012 Woody Flowers (Oregon); 2011 Volunteer of the Year (Oregon); 2011 Finalist & Captain (San Diego); 2011 Innovation in Control (San Diego); 2010 & 2007 Chairman's (Oregon); 2010 Regional Champions (Colorado); 2010 Innovation in Control (Colorado); 2009 & 2008 Engineering Inspiration (Oregon); 2008 Regional Champions (Oregon); 2007 Regional Finalist (Oregon); 2005 Rookie Inspiration (PNW)
  #5   Spotlight this post!  
Unread 09-02-2011, 14:11
Jon Stratis's Avatar
Jon Stratis Jon Stratis is offline
Mentor, LRI, MN RPC
FRC #2177 (The Robettes)
Team Role: Mentor
 
Join Date: Feb 2007
Rookie Year: 2006
Location: Minnesota
Posts: 3,835
Jon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond repute
Re: Victor Syncing

The most common use is to stick two CIM's into a toughbox or CIMple box and run them with two separate victors or jaguars, which are then signaled through a Y cable. While Dale is right in that it won't solve all the problems, it's good enough. The CIM's will run close to the same speed, although it's almost guaranteed that one will want to go slightly faster than the other if you just had it free spinning. In that case, the slower motor would act as a drag on the faster motor... but the speeds are so close you wouldn't notice anything. Under load (aka when attached to wheels and driving around), the actual work being done by the motors is going to be a larger drag than any small difference between the motors, and you'll end up seeing them operate at the same speed, but overall providing about double the torque when compared to running a single motor.

So, if your using the same motors, running in the same direction, you won't see any real difference, and the difference that is there is typically negligible.
  #6   Spotlight this post!  
Unread 09-02-2011, 15:03
bladetech932's Avatar
bladetech932 bladetech932 is offline
Programmer of awesome
AKA: Jon
FRC #0932 (Circuit Chargers)
Team Role: College Student
 
Join Date: May 2009
Rookie Year: 2009
Location: Tulsa
Posts: 242
bladetech932 is on a distinguished road
Re: Victor Syncing

Sorry, I didn't mention it before but this is not for the drive it is for an elbow like joint driven by two window motors on two victors with no gearbox.
__________________
Expect the best, Prepare for the worst
  #7   Spotlight this post!  
Unread 09-02-2011, 15:31
billbo911's Avatar
billbo911 billbo911 is offline
I prefer you give a perfect effort.
AKA: That's "Mr. Bill"
FRC #2073 (EagleForce)
Team Role: Mentor
 
Join Date: Mar 2005
Rookie Year: 2005
Location: Elk Grove, Ca.
Posts: 2,384
billbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond repute
Re: Victor Syncing

Make sure you calibrate the two Victors using a "Y" cable. That way, they will also be calibrated to the exact same signal. This "should" get the two motors very close in performance.
__________________
CalGames 2009 Autonomous Champion Award winner
Sacramento 2010 Creativity in Design winner, Sacramento 2010 Quarter finalist
2011 Sacramento Finalist, 2011 Madtown Engineering Inspiration Award.
2012 Sacramento Semi-Finals, 2012 Sacramento Innovation in Control Award, 2012 SVR Judges Award.
2012 CalGames Autonomous Challenge Award winner ($$$).
2014 2X Rockwell Automation: Innovation in Control Award (CVR and SAC). Curie Division Gracious Professionalism Award.
2014 Capital City Classic Winner AND Runner Up. Madtown Throwdown: Runner up.
2015 Innovation in Control Award, Sacramento.
2016 Chezy Champs Finalist, 2016 MTTD Finalist
  #8   Spotlight this post!  
Unread 09-02-2011, 15:41
bladetech932's Avatar
bladetech932 bladetech932 is offline
Programmer of awesome
AKA: Jon
FRC #0932 (Circuit Chargers)
Team Role: College Student
 
Join Date: May 2009
Rookie Year: 2009
Location: Tulsa
Posts: 242
bladetech932 is on a distinguished road
Re: Victor Syncing

Quote:
Originally Posted by billbo911 View Post
Make sure you calibrate the two Victors using a "Y" cable. That way, they will also be calibrated to the exact same signal. This "should" get the two motors very close in performance.
How do I calibrate the victors?
__________________
Expect the best, Prepare for the worst
  #9   Spotlight this post!  
Unread 09-02-2011, 15:45
billbo911's Avatar
billbo911 billbo911 is offline
I prefer you give a perfect effort.
AKA: That's "Mr. Bill"
FRC #2073 (EagleForce)
Team Role: Mentor
 
Join Date: Mar 2005
Rookie Year: 2005
Location: Elk Grove, Ca.
Posts: 2,384
billbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond reputebillbo911 has a reputation beyond repute
Re: Victor Syncing

Quote:
Originally Posted by bladetech932 View Post
How do I calibrate the victors?
Page #2 has the details.

Quote:
Calibration Instructions
The Victor is pre-calibrated to values compatible with an
IFI Control System and re-calibration is not needed.
You can re-calibrate to achieve ‘full forward/reverse’
from your joystick movement if necessary.
NOTE: While in calibration mode, the Victor will
record the max PWM value detected as ‘full forward’,
the min PWM value as ‘full reverse’, and ‘neutral’ will
be the PWM value recorded at the release of the Cal
button. The following steps will guide.
User Calibration:
1. Power ON the speed controller.
2. Press and hold the Cal button. After a moment, the
LED indicator on the Victor will begin alternating
between RED and GREEN to indicate a cal mode.
3. While continuing to hold the Cal button, move the
joystick to the maximum and minimum positions.
This can be done in any order and as many times as
desired.
4. While continuing to hold the Cal button, return the
joystick to center (neutral position).
5. Release the Cal button.
6. A flashing GREEN indicator confirms a successful
calibration.
7. A flashing RED indicator denotes an unsuccessful
calibration.
An unsuccessful calibration occurs when either:
a) Insufficient joystick travel was detected in forward
and/or reverse.
b) The trim tab is too far from center.
Resetting Calibration to Factory Pre-calibration:
1. Power OFF the speed controller.
2. Press and hold the Cal button.
3. While continuing to hold the Cal button, Power ON
the speed controller.
4. A flashing GREEN indicator denotes calibration is
reset. Release the Cal button.
__________________
CalGames 2009 Autonomous Champion Award winner
Sacramento 2010 Creativity in Design winner, Sacramento 2010 Quarter finalist
2011 Sacramento Finalist, 2011 Madtown Engineering Inspiration Award.
2012 Sacramento Semi-Finals, 2012 Sacramento Innovation in Control Award, 2012 SVR Judges Award.
2012 CalGames Autonomous Challenge Award winner ($$$).
2014 2X Rockwell Automation: Innovation in Control Award (CVR and SAC). Curie Division Gracious Professionalism Award.
2014 Capital City Classic Winner AND Runner Up. Madtown Throwdown: Runner up.
2015 Innovation in Control Award, Sacramento.
2016 Chezy Champs Finalist, 2016 MTTD Finalist

Last edited by billbo911 : 09-02-2011 at 16:53. Reason: Copied instructions into the post.
  #10   Spotlight this post!  
Unread 09-02-2011, 16:50
Jon Stratis's Avatar
Jon Stratis Jon Stratis is offline
Mentor, LRI, MN RPC
FRC #2177 (The Robettes)
Team Role: Mentor
 
Join Date: Feb 2007
Rookie Year: 2006
Location: Minnesota
Posts: 3,835
Jon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond repute
Re: Victor Syncing

Quote:
Originally Posted by bladetech932 View Post
Sorry, I didn't mention it before but this is not for the drive it is for an elbow like joint driven by two window motors on two victors with no gearbox.
We used two window motors last year to power a cam for our kicker. Essentially, the motors were sandwiched together with the cam in the middle. We powered ours from two spikes, but never had a problem with any speed differential between the two window motors.
  #11   Spotlight this post!  
Unread 09-02-2011, 19:16
bladetech932's Avatar
bladetech932 bladetech932 is offline
Programmer of awesome
AKA: Jon
FRC #0932 (Circuit Chargers)
Team Role: College Student
 
Join Date: May 2009
Rookie Year: 2009
Location: Tulsa
Posts: 242
bladetech932 is on a distinguished road
Re: Victor Syncing

Quote:
Originally Posted by eagle33199 View Post
We used two window motors last year to power a cam for our kicker. Essentially, the motors were sandwiched together with the cam in the middle. We powered ours from two spikes, but never had a problem with any speed differential between the two window motors.
Yeah, what im worried about is the variable speed of the victors because window motors usually only go forward stop reverse and im worried about them changing at different rates and twisting the mount
__________________
Expect the best, Prepare for the worst
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 03:54.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi