Newbie looking at 6040 (China CNC) for polypropylene 15mm sheet

[JOGARA]

Yep, didnt get any response. No problem.

The STLs you provided were out of scale too, they dont translate to workable CAD parts. They can be converted but Fusion refused. Its better (for future) to export to something other than STL if possible (Step / IGES etc).

Yea all the people sending me messages said that.
Though they print fine on my 3D printer exporting that way..??



[edit]
Whats with the off center ring on these collect nuts btw?
I have seen it on both this new ball bearing one and my current one shipped with the machine.

[Clive S]

[edit]
Whats with the off center ring on these collect nuts btw?
I have seen it on both this new ball bearing one and my current one shipped with the machine.

That is to hold the collet in place. You have to wiggle the collet in there. I take it you have been doing this, as this might have been your problem.

[m_c]

That is to hold the collet in place. You have to wiggle the collet in there. I take it you have been doing this, as this might have been your problem.

It's actually to extract the collet from the holder. If you don't clip the collet past the offset lip, then the nut doesn't pull the collet back out when slackened, which can leave you with quite a big headache. Off course not clipping it in also causes uneven clamping, which can lead to excess runout and things not being as secure as they could be...

[Clive S]

It's actually to extract the collet from the holder. If you don't clip the collet past the offset lip, then the nut doesn't pull the collet back out when slackened, which can leave you with quite a big headache. Off course not clipping it in also causes uneven clamping, which can lead to excess runout and things not being as secure as they could be...

Of course you are correct My bad.

[Chaz]

Yea all the people sending me messages said that.
Though they print fine on my 3D printer exporting that way..??



[edit]
Whats with the off center ring on these collect nuts btw?
I have seen it on both this new ball bearing one and my current one shipped with the machine.

I suspect its the way that our CAD systems are 'interpreting' the STL. I know there are some attributes that you can change when you import but not knowing the 'source', we may not know these and this means that the outputted assumption is wrong.

The fact that I wasnt the only person that said this means that there is something not 100%.

What do you use the make the STL?

[JOGARA]

I suspect its the way that our CAD systems are 'interpreting' the STL. I know there are some attributes that you can change when you import but not knowing the 'source', we may not know these and this means that the outputted assumption is wrong.

The fact that I wasnt the only person that said this means that there is something not 100%.

What do you use the make the STL?

Exporting straight fro Fusion360 by right clicking my part and selecting "save as STL"






But why is it offset?
Wouldn't it also add vibration to the machine?

[m_c]

But why is it offset?
Wouldn't it also add vibration to the machine?

It's offset so you can get the collet in/out easily.
If it wasn't offset, you'd not be able to get the collet in/out easily, or you risk the collet popping out the nut when trying to remove the nut/cullet from the chuck.

Balanced nuts are available, if balance is an issue.

[Chaz]

Exporting straight fro Fusion360 by right clicking my part and selecting "save as STL"






But why is it offset?
Wouldn't it also add vibration to the machine?

Not sure. Perhaps rather saving it as Fusion3D or similar.