Hi, PetkovStoyan:
"floating" means that the third bearing has extra clearance so that it won't "fight" against the other two major ones.
Three bearing concept is very popular on precision long shafts. Many spindles in CNC machines (lathe for example) have 3 bearings. You position your spindle...
Hi, PetkovStoyan:
Your language for datum is not accurate. You are talking about datum features rather than datum themselves.
A datum is a coordinate system with three mutually perpendicular planes with an origin.
You have 3 datum features (candidates) on your shaft. When an engineer designs...
Hi, AMontembeault:
Your datum feature D is too small to be qualified as a primary. Also, these 4 holes are supposed to be treated a pattern. You can locate and orient the pattern to datum feature A, B, and C with single or multiple segments FCF.
Best regards,
Alex
Hi, DimaM:
You will need to use a CMM machine to inspect position of 8+/-0.1 slot. If you don't have a CMM, you can inspect it using hard gages.
Below are general proceedures on how to inspect it using CMM machine.
1. Place the part on a fixture to do an initial alignment;
2. Probe the center...
Hi, DimaM:
The slot (dimension 8+/-0.1) is a feature of size. The position tolerance of this slot indicates how far off its derived medium plane (center plane of the slot) are allowed from axis of datum feature B which is perpendicular to datum feature A. Position of the slot has nothing to do...
I would not use the tapped hole as datum feature. If your thread hole is a precision one, generally it is inspected with thread plug.
If I were you, I would use datum features below:
Primary: OD (59mm)
Secondary: Bottom surface
Tertiary: 5.00 slots
Your 9.00 hole should be two separate...
Please take a look at URL below.
https://www.gdandtbasics.com/parting-line/#:~:text=Parting%20Line%201%20Symbol%3A%202%20Definition%3A%20A%20parting,of%20the%20parting%20line.%20...%204%20All%20Symbols
Best regards,
Alex
Hi, ndpaintballer:
Well, it depends on how it is used. I can't tell size of the profile from your sketch. An extruded vinyl profile with 200" long can be very flexible. Are you going to inspect it at free state or in a restraint condition?
Best regards,
Alex
Hi, Glass_Half_Full:
Design intents are not clear according to your sketch. What are those 16 holes? Are they threaded holes or holes for dowel pins? Most of those holes are for fastening purpose. You don't need tolerance of "zero at MMC" for threaded holes.
Precision rails are normally...
Hi, Deepak:
I have not used Solidworks VBA for quite a while. I got a few codes from ChatGPT and Google/Bard and tried to GET and SET dimensions on a sketch in an assembly model. They did not work. Could you please show me statements to GET and SET dimensions using Solidworks' GET and SET...
Hi, MPSU:
The datum targets (A1, A2 and A3) are in-line. They are not robust to be qualified as a primary datum. Position of M6 x 1.0 with maximum material boundary is questionable. For threads, we generally use projected tolerances (P with circle).
Best regards,
Alex
Hi, PtoMonty:
So, you have a plate (let's call it "part A") with 6 holes two of which are dia. 9mm.
You will press two pins into those dia. 9mm holes.
What ("part B") will be attached to these two pins that stick out of the plate ("part A")? Is this "part B" a single part or multiple parts...
Hi, PtoMonty:
You can't press 2 pins into two holes (dia. 9mm) with the position tolerances of dia. 0.5mm wrt to datum feature A unless the plate is made from soft materials, like lumber.
Best Regards,
Alex
Hi, PtoMonty:
You mentioned that the actual part has two 9 mm holes. You can use these features below to locate dia. 11 holes.
Primary: A (bottom of the part);
Secondary:: One of the 9mm holes;
Tertiary: The other 9mm hole.
Alternatively, you can use these two datum features below...