How to add teeth?

[SimonPlatten]

I am working on a model which eventually I will print, part of the model:

 I will be purchasing this:

https://www.amazon.co.uk/Dadabig-Printer-Timing-Pulley-Wrench/dp/B07XHRQ8H1/ref=pb_allspark_dp_sessi...

How do I add teeth to the wheel shown in the above image to be of the correct size for the belt in the link?

[mango.freund]

Hi,  @SimonPlatten  have you tried to find a part in mc-mastercarre that corresponds to your model diameter? the toothing depends on the diameter. a little smaller diameter shouldn't be a problem. then you can project the contour and transfer it to your diameter--- mango

[SimonPlatten]

I didn't think the diameter matters, isn't it making the size of the teeth compatible with the belt that is important?

The diameter of is 455mm

[mango.freund]

du musst wissen, dass sich der riemen mit den zaehnen bei kleineren durchmessern verformt -- diese verformung muss du korrigieren oder dein riemen verschleisst.

utilice google translator https://translate.google.com/?sl=auto&tl=en&op=translate

mango

[SimonPlatten]

Sorry, I've translated your posted using the link but I don't understand, I want to use the belt with the larger diameter of 455mm down to the motor cog the link I posted shows the motor cogs.

[mango.freund]

@SimonPlatten  -- I understand, but if you have a gear with 20 teeth and another with 100 teeth, they are not shaped the same. the distance between the teeth is more or less curved in relation to the diameter.

[SimonPlatten]

Ok, what I am looking for is a solution where I supply the diameter of the part and the tooth size required to fit the belt and then Fusion 360 adds the teeth around the part where they will fit into the belt.

I have no idea if it has such a function to do this.

[mango.freund]

[SimonPlatten]

Whats your point?  You cut the belt to your required length and rejoin.

[mango.freund]

the photo shows you the deformation of the teeth - you should already see that. Little on the outside - very deformed on the inside

it's hard to explain all of this to you. the point is, you can wonderfully shape the belt around the little gear, but the big wheel can't make a full turn because you have a junction where you can't have teeth on the big wheel and neither on the small one. the belt cannot be stuck and you may need a belt that is not extended! this belt is very good for a 3d printer that only drives back and forth - never make a full turn of the belt - greetings mango

[SimonPlatten]

Thank you, please excuse my ignorance, I am exploring several things here, I want to create a model where I can print and drive a belt reliably that will be connected to a motor which I want to use as a generator, so the mechanism needs to work.

[mango.freund]

[SimonPlatten]

Thank you, but I'm not sure why you have posted this link?  The question I'm asking is how do I use Fusion 360 to add teeth to a circular object?

Ok, I found this:

https://productdesignonline.com/fusion-360-tutorials/create-custom-3d-printable-gears-in-fusion-360/

Looks like its what I need, more questions, where do I get all the information that is required to populate the form?

create-gears-in-fusion-360-using-the-spur-gear-addin-product-design-online-2-min.jpg

[g-andresen]

Hi,

To create the gear, the exact data of the tooth profile are required.
You can either take this from a table or from an identical component from e.g. MCMASTER.

günther

[etfrench]

The spur gear addin will not work for timing belt pulleys.  There are several forum threads on creating gt2 pulleys. Which timing belt profile are you planning on using?  I use Gearotic to design timing belt pulleys.

[mango.freund]

hi @SimonPlatten 

as i already informed you i do not find your idea with this belt successful.

but your question is how you can do it. please take a look at the timeline to see how it can be done.

Perhaps it will dawn on you that the weak belt will never be able to withstand these loads, and your printed out timing belt pulley will certainly not be accurate enough to print out either.

on a mc-mastercarr, no disc has more than 120 teeth. you have over 680 teeth on this belt and is not enough.

take a look.                    -----------greetings mango

[TheCADWhisperer]

---

@SimonPlatten wrote:

.... connected to a motor which I want to use as a generator, so the mechanism needs to work.

---

How many teeth do you want on your part - what is the ratio between the  two pulleys?

Which pulley is the driven pully and which one is the driving pulley (I think I know from your description - but I want you to tell me so that there is no confusion).

[TheCADWhisperer]

See Attached.

[etfrench]

@TheCADWhisperer Sorry, but your design is not correct.  The pitch diameter of the pulley is not in the middle of the R1.0 circle as you have drawn it.  Here is a comparison between Gearotic (blue) and yours (black) :

Here's the data for the pulley:

Fixing the outside diameter and the relationship to the pitch diameter should make a workable pulley.

[TheCADWhisperer]

Yikes!

Will be an easy edit for @SimonPlatten to see if he understands the nomenclature (better than I did).

🙄