Drawing a Gear

N/A

I'm trying to draw a gear and was wondering if there is an easy way to draw the tooth
profile around the circumference of a circle? I've attached a picture of the circle
with one tooth profile drawn. The circle is about 3" in diameter.
Ed
9 REPLIES

Re: Drawing a Gear

N/A
Ed,
You would draw the tooth and the tooth space, and then use the Circular
Pattern command to "array" the elements around the axis. I have included an
example. All you need to do is select the tooth and tooth space elements,
select the Circular Pattern, specify 360° and 60 occurrences, specify the
center and Finish.
--
Ken
http://grundey.blogspot.com
"Ed Kadlec" wrote in message
news:47c57891$1@bbsnotes.ugs.com...
>
> I'm trying to draw a gear and was wondering if there is an easy way to
> draw the tooth
> profile around the circumference of a circle? I've attached a picture of
> the circle
> with one tooth profile drawn. The circle is about 3" in diameter.
>
> Ed



Re: Drawing a Gear

N/A

Hi Ken,
Thanks for the lesson. I used your file and was able to make your gear come out
as expected. When I went to draw my gear I ran into a problem. The space between
the teeth is intruding into the tooth next to it. I double checked my dimensions
and they all match what they are supposed to be. I am drawing a rotary table from
plans out of a magazine and am using their dimensions. It's possible they have an
error in one of their dimensions. I've attached a file showing what I am getting
for my gear. The tooth profile to the left of the gear is what the magazine shows
for the tooth profile. Any help would be greatly appreciated. This forum has been
a great help to me while I am learning Solid Edge 2D.
Thanks,
Ed

"PellaKen" wrote:
>Ed,
> You would draw the tooth and the tooth space, and then use the Circular
>
>Pattern command to "array" the elements around the axis. I have included
>an
>example. All you need to do is select the tooth and tooth space elements,
>
>select the Circular Pattern, specify 360° and 60 occurrences, specify the
>
>center and Finish.
>
>--
>Ken
>http://grundey.blogspot.com

Re: Drawing a Gear

N/A
Ed, I'm not sure about their dims, but when putting teeth on a circle, the
angle of one complete tooth and space must evenly divide into 360. Your
does not, hence the overlap. Your close to 10°, bit it is actually
9.6219609°
--
PellaKen
http://grundey.blogspot.com
"Ed Kadlec" wrote in message
news:47c6be60@bbsnotes.ugs.com...
>
> Hi Ken,
>
> Thanks for the lesson. I used your file and was able to make your gear
> come out
> as expected. When I went to draw my gear I ran into a problem. The space
> between
> the teeth is intruding into the tooth next to it. I double checked my
> dimensions
> and they all match what they are supposed to be. I am drawing a rotary
> table from
> plans out of a magazine and am using their dimensions. It's possible they
> have an
> error in one of their dimensions. I've attached a file showing what I am
> getting
> for my gear. The tooth profile to the left of the gear is what the
> magazine shows
> for the tooth profile. Any help would be greatly appreciated. This forum
> has been
> a great help to me while I am learning Solid Edge 2D.
>
> Thanks,
> Ed
>
>
> "PellaKen" wrote:
>>Ed,
>> You would draw the tooth and the tooth space, and then use the
>> Circular
>>
>>Pattern command to "array" the elements around the axis. I have included
>>an
>>example. All you need to do is select the tooth and tooth space elements,
>>
>>select the Circular Pattern, specify 360° and 60 occurrences, specify the
>>
>>center and Finish.
>>
>>--
>>Ken
>>http://grundey.blogspot.com

>

Re: Drawing a Gear

N/A

Ken,
Thanks for the explaination. I am a bit confused as to how to fix it but I'll play
around with it and see if I can get it to work for me.
Ed
"Ken Grundey" wrote:
>Ed, I'm not sure about their dims, but when putting teeth on a circle, the
>
>angle of one complete tooth and space must evenly divide into 360. Your
>does not, hence the overlap. Your close to 10°, bit it is actually
>9.6219609°
>
>--
>PellaKen
>http://grundey.blogspot.com

Re: Drawing a Gear

N/A
Ed, best I can tell you is if the tooth geometry is correct, then your gear
diameter is not. Expanding/shrinking the diameter will adjust the arc
length available across the base of your tooth and will allow for the proper
angle.
--
PellaKen
http://grundey.blogspot.com
"Ed Kadlec" wrote in message
news:47c7ffd4$1@bbsnotes.ugs.com...
>
> Ken,
>
> Thanks for the explaination. I am a bit confused as to how to fix it but
> I'll play
> around with it and see if I can get it to work for me.
>
> Ed
>
> "Ken Grundey" wrote:
>>Ed, I'm not sure about their dims, but when putting teeth on a circle, the
>>
>>angle of one complete tooth and space must evenly divide into 360. Your
>>does not, hence the overlap. Your close to 10°, bit it is actually
>>9.6219609°
>>
>>--
>>PellaKen
>>http://grundey.blogspot.com

>

Re: Drawing a Gear

N/A

Hi Ken,
Since all of the dimensions, including the diameter and tooth profile, came from
the magazine article I believe there is a bad dimension also. I racked my brain
trying to get it to work with the dimensions given and I just can't see how it would
work with the magazine article dimensions. I've decided to change the number of
teeth from 40 to 90 anyway so I will design my own gear instead. Thanks a lot for
your help.
Ed
"Ken Grundey" wrote:
>Ed, best I can tell you is if the tooth geometry is correct, then your gear
>
>diameter is not. Expanding/shrinking the diameter will adjust the arc
>length available across the base of your tooth and will allow for the proper
>
>angle.
>
>--
>PellaKen
>http://grundey.blogspot.com
>"Ed Kadlec" wrote in message
>news:47c7ffd4$1@bbsnotes.ugs.com...
>>
>> Ken,
>>
>> Thanks for the explaination. I am a bit confused as to how to fix it but

>
>> I'll play
>> around with it and see if I can get it to work for me.
>>
>> Ed
>>
>> "Ken Grundey" wrote:
>>>Ed, I'm not sure about their dims, but when putting teeth on a circle, the
>>>
>>>angle of one complete tooth and space must evenly divide into 360. Your
>>>does not, hence the overlap. Your close to 10°, bit it is actually
>>>9.6219609°
>>>
>>>--
>>>PellaKen
>>>http://grundey.blogspot.com

>>
>
>

Re: Drawing a Gear

N/A

"Ed Kadlec" wrote:
>
>
>
>I'm trying to draw a gear and was wondering if there is an easy way to draw
>the tooth
>profile around the circumference of a circle? I've attached a picture of the
>circle
>with one tooth profile drawn. The circle is about 3" in diameter.
>
>Ed

Re: Drawing a Gear

N/A

Could be you've used the wrong pitch for that module of gear, why are you redrawing
it? is it to rescale?
-Andy.

"Ken Grundey" wrote:
>Ed, I'm not sure about their dims, but when putting teeth on a circle, the
>
>angle of one complete tooth and space must evenly divide into 360. Your
>does not, hence the overlap. Your close to 10°, bit it is actually
>9.6219609°
>
>--
>PellaKen
>http://grundey.blogspot.com
>"Ed Kadlec" wrote in message
>news:47c6be60@bbsnotes.ugs.com...
>>
>> Hi Ken,
>>
>> Thanks for the lesson. I used your file and was able to make your gear
>> come out
>> as expected. When I went to draw my gear I ran into a problem. The space

>
>> between
>> the teeth is intruding into the tooth next to it. I double checked my
>> dimensions
>> and they all match what they are supposed to be. I am drawing a rotary
>> table from
>> plans out of a magazine and am using their dimensions. It's possible they

>
>> have an
>> error in one of their dimensions. I've attached a file showing what I am

>
>> getting
>> for my gear. The tooth profile to the left of the gear is what the
>> magazine shows
>> for the tooth profile. Any help would be greatly appreciated. This forum

>
>> has been
>> a great help to me while I am learning Solid Edge 2D.
>>
>> Thanks,
>> Ed
>>
>>
>> "PellaKen" wrote:
>>>Ed,
>>> You would draw the tooth and the tooth space, and then use the
>>> Circular
>>>
>>>Pattern command to "array" the elements around the axis. I have included
>>>an
>>>example. All you need to do is select the tooth and tooth space elements,
>>>
>>>select the Circular Pattern, specify 360° and 60 occurrences, specify the
>>>
>>>center and Finish.
>>>
>>>--
>>>Ken
>>>http://grundey.blogspot.com

>>
>
>
www.continual-motion.com

Re: Drawing a Gear

N/A

Andy,
I can't answer your question about the pitch because the gear was designed by someone
else. I'm drawing it in CAD for two reasons. To get practice at using Solid Edge
2D and so I can print it out and take it to the shop and use it as a reference while
I make the gear. I don't want to take the magazine to the shop and get it all greasy.
Ed
"Andy Southern" wrote:
>
>Could be you've used the wrong pitch for that module of gear, why are you
>redrawing
>it? is it to rescale?
>
>-Andy.
>
>
>"Ken Grundey" wrote:
>>Ed, I'm not sure about their dims, but when putting teeth on a circle, the
>>
>>angle of one complete tooth and space must evenly divide into 360. Your

>
>>does not, hence the overlap. Your close to 10°, bit it is actually
>>9.6219609°
>>
>>--
>>PellaKen
>>http://grundey.blogspot.com
>>"Ed Kadlec" wrote in message
>>news:47c6be60@bbsnotes.ugs.com...
>>>
>>> Hi Ken,
>>>
>>> Thanks for the lesson. I used your file and was able to make your gear

>
>>> come out
>>> as expected. When I went to draw my gear I ran into a problem. The space

>>
>>> between
>>> the teeth is intruding into the tooth next to it. I double checked my
>>> dimensions
>>> and they all match what they are supposed to be. I am drawing a rotary

>
>>> table from
>>> plans out of a magazine and am using their dimensions. It's possible they

>>
>>> have an
>>> error in one of their dimensions. I've attached a file showing what I am

>>
>>> getting
>>> for my gear. The tooth profile to the left of the gear is what the
>>> magazine shows
>>> for the tooth profile. Any help would be greatly appreciated. This forum

>>
>>> has been
>>> a great help to me while I am learning Solid Edge 2D.
>>>
>>> Thanks,
>>> Ed
>>>
>>>
>>> "PellaKen" wrote:
>>>>Ed,
>>>> You would draw the tooth and the tooth space, and then use the
>>>> Circular
>>>>
>>>>Pattern command to "array" the elements around the axis. I have included
>>>>an
>>>>example. All you need to do is select the tooth and tooth space elements,
>>>>
>>>>select the Circular Pattern, specify 360° and 60 occurrences, specify the
>>>>
>>>>center and Finish.
>>>>
>>>>--
>>>>Ken
>>>>http://grundey.blogspot.com
>>>

>>
>>
>
>www.continual-motion.com