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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
Haha! I'm not after it being done for nothing. Going to the Chinese was an automatic default and not one I'm tied to. I suspect a British CNC'ing shop will be handling larger orders and won't be interested. I should have mentioned aluminium is for heat-sink properties, plastic is a no-go. It's... -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
The detail is coming out from the Chinese company, the cost has jumped from $1 to $3 and they want to extrude and weld the face. They've also said if there's a lot of failure the cost could jump again. I can't see how welding the face will be good enough - it's the primary cosmetic face. -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
Useful to know for this and all my further designs, thanks! I've amended and will 3D print. I'm fairly sure the Chinese company I was conversing with don't really know what they're doing, they've asked me why I don't think extrusion will work, as in they haven't looked at the designs. Neither... -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
I've adjusted the zip-tie hole and enlarged the inner lower corners to match the 2mm radius. I imagine filleting the front will be difficult so used a 0.25mm fillet/burr. -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
I'll have a look, it's not ideal. Would 3.5mm work? This is for a zip tie it wouldn't have to be as absolute as the 1mm diameter front holes. I also have the inner lower two corners which I thought would be pointed out as an issue. They're also 1mm diameter! -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
I've no idea how many the Chinese supplier is expecting to throw away, perhaps for mould + annodisation it's 50%. I'd also like him to elaborate on what the second casting method he mentioned is exactly but haven't had the details so far. They are pushing for mould over CNC but I'd be silly to... -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
I didn't see it as being a problem with the 25mm depth as you say, would a 2mm bit have too much flex? I could make it 1.5mm radius and heighten the mount a little to compensate. -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
Not necessarily! All being equal if there's someone in the UK that can do it and the additional cost isn't astronomical it counters the reduced risk. -
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Manufacturing Suitability (CNC/Extrude?/Cast) for Part
Hi all, I've a small part (15.7mm width × 35.0mm depth × 28.0mm height) which I intended to have CNC'd with a type 2 anodised black finish. Everything I read said anodised casting doesn't really work well and this part requires a good cosmetic finish. With the chip shortage still underway I'm... -
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CNC Source for project, general hints/tips/suggestions
Damn it, wrote a reply and it's disappeared. --- Excellent post Finegrain, that's the sort of detail I need. The Chinese of course haven't mentioned it... The inner rectangular slot at the top is location critical as it acts as a placeholder for a PCB which must be precisely positioned. I... -
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CNC Source for project, general hints/tips/suggestions
Excellent post, very informative. Regarding the upper slot, that ideally needs no corners at all as it''s to hold a position critical PCB in place. It sounds like the ideal in principle is out the window? The rear inner corners have no purpose (they're actually a negative) other than to allow... -
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CNC Source for project, general hints/tips/suggestions
Just realised I can attach a zip, so now the step is attached which will make it easier. -
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CNC Source for project, general hints/tips/suggestions
Unable to edit previous post. To clarify the floor isn't slanted that's probably the picture. The top cut out is a problem, I've since rounded the edges which isn't ideal but has to be so for CNC. -
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CNC Source for project, general hints/tips/suggestions
The walls are 1 or 2mm, I wasn't expecting any cnc issues... I'm not fully up to terms, doesn't wax cast have low tolerance? -
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CNC Source for project, general hints/tips/suggestions
Hi, An electronic engineer here, weak on mechanical engineering know-how. I've a case about 70mm cubed and a relatively low quantity of around 200 (initially). Long term view is unknown until initial sale figures can predict it. Certainly I don't want to order 10,000 up-front. It looks like...