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WTF wallet attack !!

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John Stevenson:
When these opportunities come up then play th at their own game. Last time the £9.99 gringers came up, made in Holland BTW, I decided that these were consumables and a new Bosch would be about £100 so bought ten of them and still running off stock. Funnily enough they have never repeated the offer around here again.

nrml:

--- Quote from: hermetic on September 01, 2016, 11:23:37 AM ---The problem I had with the bed wipers was that although they fit the bolt holes, they do not actually wipe the bed, and did not fit to the V way either. I have a Mk1 roundhead Colchester Student, which had 3 wipers missing anyway. the one that was there had a felt insert inside a folded or pressed steel enclosure. I solved the problem by super gluing some thin felt to the bottom of the plastic wipers, which are now ok, but they could be better. Still have very little faith in 3d printing!

--- End quote ---

I would recommend cutting them out of nitrile rubber (4-5mm sheet works well) and using a hole punch to  make the mounting holes. Mine seem to be holding up well so far and work very very well. Even if they wear out I still have enough left from a £1.85 sheet to make another 4 or 5 complete sets.

wagnmkr:
This is an interesting thread. It certainly shows the different attitudes that prevail in our hobby. I am not disagreeing with anyone at all.

As far as the cost of 3d printing goes ... I have had one for a couple of months and I am nearing the 200 or so hours on it. It took near enough to two weeks to get it dialed in to the point where I can start a print, and leave it to it, allowing me to work on the mill or lathe, or go for a swim.

My friend owns a pet store that specializes in aquariums and reptiles. You guessed it ... soon as he heard I had a printer, He wanted stuff printed. Simple things like little perforated trays for starting plants on. Nothing to it, right! First prototype drawn up and printed ... 2 hours. Not quite right so revise the drawing and reprint. Better, but no cigar, even though it was exactly what he asked for. Third iteration of said shelf ... perfect, but not quite good enough quality, so I reduced the extrusion thickness ...

The long and short of it is that he can get what he needs from regular distributor for $1.50 and wants to cut that cost. He wanted to pay me $1.00 each and he wanted 100 at a time. My printer will do 9 at once at the size he wants, but at the quality he wants, that takes 4 1/2 hours per 9! Do the math and I would be printing for a long time to fill the order. I politely declined the business, gave him the samples that I made, and decided that a commercial venture as a 3d printing firm is not on my cards.

In my humble opinion, the fellow doing the wipers was losing money.

Tom

tom osselton:
Have you thought of a vacumformer this one I am building will live at protospace for the maker comunity.

PK:
OK, so given the meandering nature of this thread, it seem utterly appropriate to start talking about Vac formers.
Here's one I prepared earlier. 
Built our 'usual' way, from laser cut steel, tacked together. 
It has a pneumatic ram pushing up the plenum table.

Vac forming is one of those rare process' that seems to be tolerant of a wide range of operating conditions. Whilst we definitely got better at it over time, we sold the very first part we pulled on this machine.

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