Lancashire & Yorkshire Locomotives - QCAD and Fusion 360

[Lancastrian]

Anchor Link for the Dreadnought/Baltic Tank.

 

[michael mott]

Sometimes I wish I had taken the time to learn 3D drawing, I just can’t seem to get my head around it. I do however enjoy seeing what you are doing. I can also see how much clearer it is to assemble the parts than with 2D.
Michael

 

[Lancastrian]

Sometimes I wish I had taken the time to learn 3D drawing, I just can’t seem to get my head around it. I do however enjoy seeing what you are doing. I can also see how much clearer it is to assemble the parts than with 2D.
Michael

Hi Michael,

I think most of the "struggle" with understanding 3D CAD design is how you have to consider where you need additional drawings to build and cut certain features of the item in question and which plane to work on. It's getting your head around three planes whereas with 2D CAD we're only looking at one plane.

This is the basic drawing for the combination lever:


I've now added the second drawing which is used to cut the shape.


The first extrusion of the basic shape gives us this. It is extruded oversize so that the shape continues over into the areas bounded by the second drawing.


The first "cut" using the second drawing shapes produces this.


The second "cut" takes us to here.


The third "cut" then makes the forked end.


It's then just a case of extruding the two lubricating covers and "chamfering" the edges.

 

[Ian@StEnochs]

Easy when you know how but there is a steep learning curve to acquire the skills.

Ian.

 

[simond]

believe me, there are days when it's not easy, even if you do have a decent knowledge of "how"!

 

[David Waite]

I wish making something like that combination leaver was as easy as you explained it,
Thank you for explaining how it is done that is something I’ve never seen before, I truly admire your skills.
David.

 

[Lancastrian]

I wish making something like that combination leaver was as easy as you explained it,
Thank you for explaining how it is done that is something I’ve never seen before, I truly admire your skills.
David.

David,

My skills extend to juggling lines on a screen and don't come close to the skills you exhibit machining parts for the instruments you make.

 

[Lancastrian]

Received these A class test castings in the post this morning from Ian Young at Sanspareil ICS taken from 3D prints by @mickoo (cheers mate). A quick measurement of the height of the front sandbox/splashers shows they are 0.0716666666mm low. More than acceptable.

 

[mickoo]

I have to say these were pushing the threshold for minimum thickness that can be printed and not bow or warp during printing or curing, creative orientation and an increase in side wall thickness by 0.1 mm resolved the issues