whizbang
Plastic
- Joined
- Dec 8, 2013
- Location
- Michigan, USA
Hey Guys,
I am looking for some feedback, as I cannot really find my exact question phrased anywhere and I am at a loss for words on how to describe it.
What I am looking for is confirmation that the strokes of my Biax are normal. I have attached pictures and a video below.
I currently have my Biax on setting 1-2, any more and it seems out of control. I have a 30-150 blade sharpened to a 60-55deg radius. I have been experimenting with 4-9deg rake angle for cutting. Reading something R. King wrote in another post for someone to try 10deg. I bought a 4x12x1 inch� block of gray cast iron. This is my practice block, similar to the one provided when I took King's class. It has been awhile, but I took his class in Kalamazoo back in 2013 I believe. I will admit that I did not pick up scraping very quickly in the class and I kind of rushed my time with the biax provided to work on the project I had brought with me. It has taken me 5yrs to acquire all the essential to really get into the scraping such as the Biax, hand scrappers, Accufinish grinder, and of course time.
Yes I know there are scratches in the part , I am not going to try and hide them, this is my first attempt at scrapping in 5yrs. I initially roughed using circles and crosses and worked to where I am now. However this is where I question if I am forgetting something.
In King's class I remember plowing of material with beautiful straight cuts, 7mm or wider cutting only on the forward stroke. Now with my current set-up, even with a 140mm radius blade, I get skinny 3-4mm wide scrapes and they are connected in a pattern that looks like a bunch of N's or W's connected. I am pushing forward and putting weight from light to more than I think I should to try to flex the blade.
I am looking for feedback:
Did I miss something very basic in set-up that is giving me these N patterns? Or is this completely normal?
I am looking to develop this skill and would really like to produce 4x4mm checker boarding. Even at slow speed less than 1 with pushing down in the radius 60 I get 2mm max width cuts. I think I am missing something fundamental. Perhaps I need higher than 600 grit on the Accufinish grinder?
Camel Back Square done during class with R. King in 2013
Sample Scraping with Dapra Power Biax - YouTube
N pattern on current test piece (please note, when I uploaded the video it looked good but when I viewed link through phone it was fuzzy but I was able to select the quality which improved the image)
Cast Iron test piece
I am looking for some feedback, as I cannot really find my exact question phrased anywhere and I am at a loss for words on how to describe it.
What I am looking for is confirmation that the strokes of my Biax are normal. I have attached pictures and a video below.
I currently have my Biax on setting 1-2, any more and it seems out of control. I have a 30-150 blade sharpened to a 60-55deg radius. I have been experimenting with 4-9deg rake angle for cutting. Reading something R. King wrote in another post for someone to try 10deg. I bought a 4x12x1 inch� block of gray cast iron. This is my practice block, similar to the one provided when I took King's class. It has been awhile, but I took his class in Kalamazoo back in 2013 I believe. I will admit that I did not pick up scraping very quickly in the class and I kind of rushed my time with the biax provided to work on the project I had brought with me. It has taken me 5yrs to acquire all the essential to really get into the scraping such as the Biax, hand scrappers, Accufinish grinder, and of course time.
Yes I know there are scratches in the part , I am not going to try and hide them, this is my first attempt at scrapping in 5yrs. I initially roughed using circles and crosses and worked to where I am now. However this is where I question if I am forgetting something.
In King's class I remember plowing of material with beautiful straight cuts, 7mm or wider cutting only on the forward stroke. Now with my current set-up, even with a 140mm radius blade, I get skinny 3-4mm wide scrapes and they are connected in a pattern that looks like a bunch of N's or W's connected. I am pushing forward and putting weight from light to more than I think I should to try to flex the blade.
I am looking for feedback:
Did I miss something very basic in set-up that is giving me these N patterns? Or is this completely normal?
I am looking to develop this skill and would really like to produce 4x4mm checker boarding. Even at slow speed less than 1 with pushing down in the radius 60 I get 2mm max width cuts. I think I am missing something fundamental. Perhaps I need higher than 600 grit on the Accufinish grinder?
Camel Back Square done during class with R. King in 2013
Sample Scraping with Dapra Power Biax - YouTube
Cast Iron test piece
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