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Results 31 to 45 of 405
Thread: The new scraping thread
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2nd June 2011, 07:57 PM #31
I break stuff...
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2nd June 2011, 09:26 PM #32
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3rd June 2011, 09:17 AM #33
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3rd June 2011, 11:23 AM #34
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Bryan,
As I've said elsewhere, I wasn't very impressed after waiting 8 months for them to get them back in stock to find the price had gone up 40% even with what the $AU had done. Still, its their job to set their prices and my job to decide if I will pay it or not.
Does it say where it was made?
Stuart
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3rd June 2011, 12:06 PM #35
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3rd June 2011, 02:07 PM #36
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3rd June 2011, 07:44 PM #37
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Bob are all those pictures of scraped surfaces? The first couple look more like grinding with frosting/flaking added. It may just be how it looks in the photos.
Pete
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3rd June 2011, 07:46 PM #38
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3rd June 2011, 09:40 PM #39
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Just shows how much I know about frosting / scraping Pete, F A
. I'm here to learn.
I found a couple of photos of another 13 with the horizontal headstock removed. Whilst not really clear you can see scraping on the ways of the main casting. Keeping these photos company is one of an FP-1 showing frosting on it's vertical ways which suggests that both the Swiss and their neigbours partook in self abuse.
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3rd June 2011, 09:51 PM #40
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With your standards of workmanship I can imagine you getting in to scraping in a big way Bob. The last photo shows some nicely scraped slides.
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3rd June 2011, 10:16 PM #41
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3rd June 2011, 10:22 PM #42
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The 13 would benefit from some correctly applied scraping. Wear is apparent in the X and Y axes. The machine is 49 years old. It's not bad but there is a discernable tightness towards the limit of travel in those directions. I would want to be proficient in the art before I tackled the task. I will watch keenly as this tutorial progresses.
BT
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3rd June 2011, 10:48 PM #43
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4th June 2011, 02:02 AM #44
Hi .RC,
Thanks again for finding that, I bought one on line from the website and picked it up this afternoon, the guy has a pretty good range of stuff, but since he is really only setup only for on-line sales, you have to ring to arrange a pickup time. But seeing it weighs 55 kg, pick-up is a good option if you live in Melbourne. I imagine freight would be expensive.
Nice guy, very helpful.
Here is the surface plate, comes with a calibration sheet and looks ok, although I don't profess to know what constitutes a good surface plate. 400x400x100 for $250 seems like a good deal to me.
Now I can start properly checking those squares and angle plates.
Regards
Ray
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4th June 2011, 08:59 AM #45
I went looking for some links I found when I was beginning scraping. Here is one of the fellows at Kitamura with the heavy duty pelvic thrust method
[ame="http://www.youtube.com/watch?v=PQEUScJvRNU&feature=related"]YouTube - ‪Kitamura Hand Scraping of a Vertical Machining Center‬‏[/ame]
This is more like a standard method, except I think you need to be more constant once you've settled on the direction you are scraping this iteration.
[ame="http://www.youtube.com/watch?v=uHF7TtHVSWE"]YouTube - ‪scraping in a lathe's bed // Bettbrücke einschaben‬‏[/ame]
From good old Wiki, what a finely scraped surface looks like.
This scraping summary pdf may also be of use.
A couple of my scraped planes:
BILD0058.jpg Attachment 172035
Also for anyone interested in one way of sharpening the TC scraper insert, there is an explanation of how I do it at the bottom of this link. Note I only use the 3000grit diamond powder now and it still gives a fine mirror finish to the TC.