Dimension a spline on a drawing
Dimension a spline on a drawing
(OP)
What is the correct way to dimension a spline on a drawing? While not that important (for me right now) as the CAM software will generate the path from the 3D model. Im just curious as to how it would be done if there was no model to generate the path and programing was done from just a drawing.
Points and angles?
Inspection is for another discussion...
Thanks
Points and angles?
Inspection is for another discussion...
Thanks
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0





RE: Dimension a spline on a drawing
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Dimension a spline on a drawing
The math behind B-spline definition is well-documented, not hard to unearth with Google. I wouldn't recommend using that for inspection or definition purposes, though.
RE: Dimension a spline on a drawing
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0
RE: Dimension a spline on a drawing
There have been several threads about this if you're interested.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Dimension a spline on a drawing
In the past I've used BS A19:1941 and recall using a note with something like "SPLINE 1/4" x 36 TO BS A19:1941". This standard is now obsolete and times have moved on ...
It also depends on how you are going to check the spline. If using a gauge its probably ok just to reference the standard. If using other inspection methods you probably want to note some of these ... number of teeth, pitch angle, dimension across flats, OD, ID, dimensions "across wires", radii.
The best thing I've ever come across for splines is Scwhanog Splining: http
The splines produced are utterly true (no twisting), spot on accurate and very quick to machine. See attached info!
Jon
Medical Design Eng - Glos. UK
NX 6.0.4.3 / TCE V10.0.3.8.6
RE: Dimension a spline on a drawing
I was under the impression that the OP was in regards to a b-spline curve (a sometimes random appearing series of points connected together), and not a gear tooth.
Perhaps the OP need to clarify.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Dimension a spline on a drawing
Took me a minute to understand why you posted the link....
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0
RE: Dimension a spline on a drawing
RE: Dimension a spline on a drawing
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Dimension a spline on a drawing
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
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RE: Dimension a spline on a drawing
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Dimension a spline on a drawing
I ended up dimensioning points.
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0