small.planes
Aluminum
- Joined
- Sep 5, 2008
- Location
- Leics UK
I posted this over in the metrology forum, but it was suggested that I might get a better answer here to the scraping part of the question.
Some years ago I bought a surface grinder. With it came a 24" cast iron surface plate that some muppet had 'reconditioned' lightly with a flap disk!
It was free, I had a trailer, and I needed a welding plate that was 'flat' for some level of flat, so I took it.
I also have a 30x48 Cast iron table, which looks unmarked - original planer marks are on it, only minor scratches. I have no idea how flat it is, it also is use a lot as a bench (covered with 3/4" sheet of MDF + anti corrosion paper to protect it).
I have no intention of scraping the 30x48, although I would like to understand how flat it is at some point. It seems useful to have a large flat thing for as yet unknown reasons (it was £50 and is a useful 'bench')
So I am going to buy a 450x450 (18") plate, probably granite and set it on its own stand. Better suited to the general size of things, and not a bench.
However the 24x24 seems like an ideal flat thing to start on, except I have no 24x24 or larger known master.
Can I scrape a 24x24 flat using an 18x18 as the master, but moving it around? something like do 18x18, then move and cover the last 6" or similar.
Comments - even 'no you cannot' type welcomed.
Dave
Some years ago I bought a surface grinder. With it came a 24" cast iron surface plate that some muppet had 'reconditioned' lightly with a flap disk!
It was free, I had a trailer, and I needed a welding plate that was 'flat' for some level of flat, so I took it.
I also have a 30x48 Cast iron table, which looks unmarked - original planer marks are on it, only minor scratches. I have no idea how flat it is, it also is use a lot as a bench (covered with 3/4" sheet of MDF + anti corrosion paper to protect it).
I have no intention of scraping the 30x48, although I would like to understand how flat it is at some point. It seems useful to have a large flat thing for as yet unknown reasons (it was £50 and is a useful 'bench')
So I am going to buy a 450x450 (18") plate, probably granite and set it on its own stand. Better suited to the general size of things, and not a bench.
However the 24x24 seems like an ideal flat thing to start on, except I have no 24x24 or larger known master.
Can I scrape a 24x24 flat using an 18x18 as the master, but moving it around? something like do 18x18, then move and cover the last 6" or similar.
Comments - even 'no you cannot' type welcomed.
Dave