It's been a funny old week, very wet and warm but today it has turned a touch freezio and sunny. I have been looking into designing and investment casting some posh decorative bits for my muses(pain in the bum) table engine with a glass cylinder. I was just sketching stuff out and my draughting compasses broke again, they are forty years old and have been repaired twice before so I bit the bullet and ordered a new pair; £6.99p from Amazon, possibly less than a tin of brake cleaner and tub of Loctite to repair the old ones.
They look fine if they are all metal, I pick them up tomorrow as I have to get somebody else with Amazon Prime to order them, saves a fiver delivery.
I am having trouble using FreeCAD it really hates generating a helix. I looked at classical columns and can do those.
The one on the left is mine and the one on the right I stole or borrowed. The one I did FreeCAD has no trouble with. The one on the right is a very low poly model and would 3D print in wax but even at a few inches tall would take a lot of cleaning up. I could re-mesh in Blender but haven't mentioned that.As you can see it's a bit bumpy and I suspect would create too much work to finish. I could ask the pain in the bum to fork out $50US for a decent model but that would cause much sucking of teeth and then without doubt it would require modifications. She has yet to find an investment caster that will work for nothing but has found a gullible soul with a 3D printer that can print a wax master for nowt. She has gone away to see the lass with the printer. I did say that the column will have to have runners, risers and air bleeds popped in by someone skilled in the mysteries of cire purdue.
Ah. Draughting compasses. I had forgotten they existed. Haven't use them since I left school. I used to really enjoy technical drawing lessons.
ReplyDeleteJohn, these work okay but Staedtler they most certainly aren't.
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