Gears end up too large.

[rewolff 0]

I'm trying to make a few gears.

Now it's just testing, but the gears don't fit.

It seems as if my outer edges are always offset to the outside a bit. Any ideas as to why this would happen?

(click for larger version)

Any ideas on how to improve this?

I'm printing with a single outer border, and 100% infill with PLA at 235 degrees.... (a bit high, but it works, I'm a bit hesitant to change that..).

[update]

[c-ernst 1]

Is the height correct? It looks like it's over extruding or the z is half what it should be.

What slicer are you using?

Have you had any other successful prints?

Chuck

[Daid 306]

In my experience, gears need about 0.2mm clearance compared to the model. But yours look a lot bigger then that. The single outer border works very good for gears, so that is good.

It's a bit hard to judge without your model and knowing which software you are using. Got some more info?

[rewolff 0]

The software I'm using is "cura". (to complete the cycle ... :-) "I'm not sure if you're familiar with that. It's apparently not recommended by ultimaker support". :-) )

I'm using the gears from

http://www.thingiverse.com/thing:1339

. I don't think I can enter "clearance" there.

I have now managed to get one size larger to work. 250 pitch instead of the 200 I had originally. However I'm still interested in how to make them smaller. I've made a 3 times 3:1 reduction, for a 27x reduction. This is still too fast. Apparently I'd rather have say 6:1 reduction each step. That means the primary gear needs to be as small as possible for the secondary to stay "reasonable size".

[dinac 0]

The software I'm using is "cura". (to complete the cycle ... :-) "I'm not sure if you're familiar with that. It's apparently not recommended by ultimaker support". :-) )

 

Daid is not familiar with CURA, he dont like it at all :lol:

.......

he made this great software !

[Daid 306]

I actually recommend this gear script:

http://www.thingiverse.com/thing:3575

I used it for this:

http://www.thingiverse.com/thing:23589

I think the script I used generates better gears the the other script.

[rewolff 0]

Ok. Downloaded. Will check it out tomorrow.

Currently printing an electronics box 10x11 cm, no manual intervention on the first layer. Let's hope it finishes by itself. :-)