Go to Post "my life is incomplete, my nose has lost the imprint of my safety goggles." - Nin_estarSaerah [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 30-11-2016, 20:33
Sam Skoglund's Avatar
Sam Skoglund Sam Skoglund is offline
Registered User
FRC #2232 (Deus Ex Machina)
 
Join Date: Oct 2016
Rookie Year: 2014
Location: Anoka MN
Posts: 31
Sam Skoglund is a jewel in the roughSam Skoglund is a jewel in the roughSam Skoglund is a jewel in the roughSam Skoglund is a jewel in the rough
WCP 32 DP Gear Pitch Diameter

I can't seem to find the pitch diameters of the 32 DP gears from WCP (pinion and 3/8" hex). Does anyone know these numbers? Or is there a way I can calculate them? Thanks in advance!
Reply With Quote
  #2   Spotlight this post!  
Unread 30-11-2016, 20:37
Cothron Theiss's Avatar
Cothron Theiss Cothron Theiss is offline
Registered Muser
FRC #4462 (Full Metal Jackets)
Team Role: College Student
 
Join Date: Feb 2016
Rookie Year: 2013
Location: Kingston, Tennessee
Posts: 570
Cothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond repute
Re: WCP 32 DP Gear Pitch Diameter

Number of teeth / Diametral pitch = pitch diameter.
__________________
"It's taking longer than expected, which was to be expected."
Reply With Quote
  #3   Spotlight this post!  
Unread 30-11-2016, 20:38
s_forbes's Avatar
s_forbes s_forbes is offline
anonymous internet person
FRC #0842 (Falcon Robotics)
Team Role: Engineer
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Phoenix, AZ
Posts: 1,150
s_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond reputes_forbes has a reputation beyond repute
Re: WCP 32 DP Gear Pitch Diameter

Quote:
Originally Posted by Sam Skoglund View Post
I can't seem to find the pitch diameters of the 32 DP gears from WCP (pinion and 3/8" hex). Does anyone know these numbers? Or is there a way I can calculate them? Thanks in advance!
32 DP means that a gear with 32 teeth has a 1" pitch diameter.

If you want to calculate the diameter for any 32 DP gear, then: (Pitch Diameter) = (# of teeth) / (32)
Reply With Quote
  #4   Spotlight this post!  
Unread 30-11-2016, 22:38
Andrew_L's Avatar
Andrew_L Andrew_L is offline
#DriveSwerveEveryDay
AKA: Drübr Inc.
FRC #1323 (Madtown Robotics) #971 (Spartan Robotics)
Team Role: Mentor
 
Join Date: Sep 2016
Rookie Year: 2011
Location: San Jose
Posts: 99
Andrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant futureAndrew_L has a brilliant future
Re: WCP 32 DP Gear Pitch Diameter

Quote:
Originally Posted by Cothron Theiss View Post
Number of teeth / Diametral pitch = pitch diameter.
Alongside this, it's also helpful to know the equation for a gear's outer diameter: OD = (N+2)/DP, where OD is the Outer Diameter in inches, N is the number of teeth, and DP is the Diametrical Pitch of the gear (32, in this case).

Modeling the outer diameter of a gear is helpful in seeing where there's interference with other parts of the robot near the gear.

Unsure if this would be helpful, but I made this video for my students a while back, and it covers some useful gear calculations.
Reply With Quote
  #5   Spotlight this post!  
Unread 30-11-2016, 22:43
avanboekel's Avatar
avanboekel avanboekel is offline
Registered User
AKA: Adam Van Boekel
FRC #5934 (Gear it Forward, Crowbotics)
Team Role: Mentor
 
Join Date: Jan 2010
Rookie Year: 2010
Location: Oswego, IL
Posts: 372
avanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant futureavanboekel has a brilliant future
Re: WCP 32 DP Gear Pitch Diameter

What kind of adder do teams usually use for 32 DP gears? I know its usually .002"-.003" for 20 DP.
__________________


2338 Gear It Forward | Student 2010-2013 | Mentor 2014-Present | oswegofirst.org
2013 Wisconsin Regional Winner (1732, 111, 2338)
2013 Midwest Regional Dean's List Finalist
2015 Midwest Regional Chairman's Award Winner
2015 Archimedes Subdivision Winner (1023, 2338, 3996, 1089)
2016 Midwest Regional Chairman's Award Winner
4096 CTRL-Z | Mentor 2014 | team4096.org
5934 Crowbotics | Mentor 2016-Present | crowbotics.org

Last edited by avanboekel : 30-11-2016 at 22:51.
Reply With Quote
  #6   Spotlight this post!  
Unread 30-11-2016, 22:51
Cothron Theiss's Avatar
Cothron Theiss Cothron Theiss is offline
Registered Muser
FRC #4462 (Full Metal Jackets)
Team Role: College Student
 
Join Date: Feb 2016
Rookie Year: 2013
Location: Kingston, Tennessee
Posts: 570
Cothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond reputeCothron Theiss has a reputation beyond repute
Re: WCP 32 DP Gear Pitch Diameter

Quote:
Originally Posted by avanboekel View Post
What kind of adder do teams usually use for 32 DP gears?
Two to four thou is a good place to start, but if you use the same "fudge" distance (never heard it called adder) as 20 dp gears, it won't be the end of the world. To be honest, most teams can't hold tight enough tolerances to worry about the difference.

EDIT - WCP suggests adding three thou to center distances, and it's always a good idea to listen to the manufacturer. I don't know how much clearance is added to these gears since that spec is rarely posted. I always suggest a small range so that you can adapt your adder to the application, either high torque or high speed. Course, that's assuming you can hold a thou tolerance on everything.
__________________
"It's taking longer than expected, which was to be expected."

Last edited by Cothron Theiss : 30-11-2016 at 23:01.
Reply With Quote
Reply


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 15:45.

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