|
|
|
![]() |
|
|||||||
|
||||||||
![]() |
| Thread Tools | Rate Thread | Display Modes |
|
#1
|
||||
|
||||
|
Metal Spur gear for Keyang motors
Is this modification allowed?
I was thinking of machining one because one of ours just stripped. - Bochek |
|
#2
|
||||
|
||||
|
Re: Metal Spur gear for Keyang motors
anyone?
|
|
#3
|
|||||
|
|||||
|
Re: Metal Spur gear for Keyang motors
You're modifying a motor. Take a look at <R61>.
You have options, though.
|
|
#4
|
||||
|
||||
|
Re: Metal Spur gear for Keyang motors
well, we have 2 more as this was the one from last year, and we didnt want to waste our ones from this year on practise, (we where planing on replacing it before shipping anyways), im just trying to prevent us from going through 3 or 4 motors over the 2 regional events we are attending.
|
|
#5
|
|||||
|
|||||
|
Re: Metal Spur gear for Keyang motors
Rule <R61> allows you to modify the output shaft and/or output interface of a motor "to facilitate the physical connection of the motor to the Robot and actuated part." Replacing a gear pressed on the end of the output shaft would seem to fit within this clause of the rule.
If you are still concerned about the legality of using a replacement metal spur gear on the output of the motor, ask the FIRST Q&A system for a formal answer. But meanwhile, to save yourself some time if they confirm this is OK, you might want to start making chips. -dave . |
|
#6
|
||||
|
||||
|
Re: Metal Spur gear for Keyang motors
Let me clarify, i am refering to replacing the nylon plastic gear that is inside the gearbox of the motor.
- Bochek |
|
#7
|
|||||
|
|||||
|
Re: Metal Spur gear for Keyang motors
Your question clarifies the reason why this is (unless Q&A says otherwise, which I doubt they will) okay... you are replacing a part of the GEARBOX that is ATTACHED to the motor.
You could, theoretically, hack off the entire worm gear mechanism and just use the motor component of the Keyang, just as you are under no obligation to use the plastic gearbox that came with the FP motors. (And, in fact, I highly recommend you don't... banebots has many excellent alternatives!) Jason NOTE: Jim's post, below, quotes the rule and has me wondering whether I went a bit too far with my surety that the Q&A will be favourable... but go ahead and ask, anyway. Last edited by dtengineering : 17-02-2008 at 00:45. |
|
#8
|
|||||
|
|||||
|
Re: Metal Spur gear for Keyang motors
"<R61> So that the maximum power level of every ROBOT is the same, motors used on the ROBOT shall not be modified in any way, except as follows:
The mounting brackets and/or output shaft/interface of the motors may be modified to facilitate the physical connection of the motor to the ROBOT and actuated part. The gearboxes for the Fisher-Price and Globe motors are not considered “integral” and may be separated from the motors. The electrical input leads on the motors may be trimmed to length as necessary. The intent is to allow teams to modify mounting tabs and the like, not to gain a weight reduction by potentially compromising the structural integrity of any motor. The integral mechanical and electrical system of the motor is not to be modified. Note that FIRST will not provide replacements for modified parts." As I read this rule, it lets you play with the gearboxes on those motors that have "separate" gearboxes, but not on those that have integral gearboxes such as the window motors. Although you are allowed to modify the output shaft (which is essentially a gear or a splined shaft on the window motors). Definitely worth asking on the Q&A, but be very specific that you intend to replace the internal gear, not just the external one as Dave apparently assumed. |
|
#9
|
||||
|
||||
|
Re: Metal Spur gear for Keyang motors
According to the GDC this is allowed, so chips start flying in the morning.
http://forums.usfirst.org/showthread.php?t=8829 - Bochek |
|
#10
|
|||||
|
|||||
|
Re: Metal Spur gear for Keyang motors
Thanks for the followup post!
|
![]() |
| Thread Tools | |
| Display Modes | Rate This Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Keyang Motor Spur Gear Pitch | Dan Petrovic | Technical Discussion | 4 | 24-01-2012 21:35 |
| Power connections for Keyang motors | aeasson | Motors | 7 | 16-02-2008 18:35 |
| Looking for Keyang Window Motors | Riley | Motors | 0 | 13-02-2008 16:20 |
| Spur gear to go CIM for 56mm Banebots | John Gutmann | Motors | 5 | 30-05-2007 13:45 |
| Where to terminals for KEYang motors? | steve d | Electrical | 1 | 09-02-2007 08:09 |