disk sander idea
Moderators: HopefulSSer, admin
This is a very interesting idea.
I am posting as a new Power Pro owner.
I'm finding the Power Pro to be quite an excellent motor, but running the 12" Sanding Disk is "interesting." I suspect the Power Pro electronics speed-control feedback-loop system is very well optimized for table-sawing, drilling, drum-sanding, etc. However, the 12" Steel disk has so much rotational inertia (appreciable mass out to 6" away from center) that it seems to make the motor "dither" around the intended speed. (I studied control-loop theory in school; I suspect that steel-disk inertia makes for a lower loop-gain than for the other modes.) When you add in a small amount of play between drive-sleeve and quill-shaft, the thing can rattle as the speed dithers.
I'm still early in thinking about this, but I'm contemplating:
- Trying a 10" steel sanding disk (knowing the 10" saw blade runs great).
- Trying a 10"-12" lighter-weight homemade disk of sorts.
- Trying an aluminum sanding disk.
I was sort of attuned to this high-inertia fact a couple years ago on my regular Mark V. I made the stupid mistake of starting the machine on "Fast", after service, with the big 12" steel disk on there. The machine went unstable, cycling from slow to fast repeatedly (belt and sheaves moving around), and actually damaged the idler bearing.
I am posting as a new Power Pro owner.
I'm finding the Power Pro to be quite an excellent motor, but running the 12" Sanding Disk is "interesting." I suspect the Power Pro electronics speed-control feedback-loop system is very well optimized for table-sawing, drilling, drum-sanding, etc. However, the 12" Steel disk has so much rotational inertia (appreciable mass out to 6" away from center) that it seems to make the motor "dither" around the intended speed. (I studied control-loop theory in school; I suspect that steel-disk inertia makes for a lower loop-gain than for the other modes.) When you add in a small amount of play between drive-sleeve and quill-shaft, the thing can rattle as the speed dithers.
I'm still early in thinking about this, but I'm contemplating:
- Trying a 10" steel sanding disk (knowing the 10" saw blade runs great).
- Trying a 10"-12" lighter-weight homemade disk of sorts.
- Trying an aluminum sanding disk.
I was sort of attuned to this high-inertia fact a couple years ago on my regular Mark V. I made the stupid mistake of starting the machine on "Fast", after service, with the big 12" steel disk on there. The machine went unstable, cycling from slow to fast repeatedly (belt and sheaves moving around), and actually damaged the idler bearing.
Chris
Available lots of stores I think, I got mine at TAG locally. Here is their website:
http://www.tagltd.com/index.aspx
I made two of these and they are quite light but have yet to use them in any serious manner.
http://www.tagltd.com/index.aspx
I made two of these and they are quite light but have yet to use them in any serious manner.
Peter
a 510,a Mini, dedicated SS drillpress, SS spt's, home made SS belt grinder, SS piston air system, Southbend 10k lathe, mill/drill, Taig
a 510,a Mini, dedicated SS drillpress, SS spt's, home made SS belt grinder, SS piston air system, Southbend 10k lathe, mill/drill, Taig
- mickyd
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- Location: San Diego, CA
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Tapered side = conical disk??moggymatt wrote:I've been using the 10" Woodcraft steel disk on my benchtop saw for a year and started using it on my 10e and Mark V this summer after getting them. It works well and doesnt seem to deflect. Also, the one I bought has a flat side and a slightly tapered side. Havent used the tapered side yet.
Mike
Sunny San Diego
Sunny San Diego
- JPG
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- Joined: Wed Dec 10, 2008 7:42 pm
- Location: Lexington, Ky (TAMECAT territory)
Sorta like a Mark 7 I presume.mickyd wrote:Tapered side = conical disk??
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
Woodcraft disk
Sort of conical but not really, see link and reviews from users
http://www.woodcraft.com/Product/200180 ... sc-10.aspx
Ed
http://www.woodcraft.com/Product/200180 ... sc-10.aspx
Ed
Ed
Carmel, NY
Carmel, NY
After reading the description and some of the reviews, I am wondering if they are selling the flat plate style or a dish shape. I would not expect a dish shape based on the description....I would expect a flat plate.eartigas wrote:Sort of conical but not really, see link and reviews from users
http://www.woodcraft.com/Product/2001809/2839/Sanding-Disc-10.aspx
Ed
Rob in San Diego
Email: SDSSmith51 AT gmail.com
Email: SDSSmith51 AT gmail.com
- JPG
- Platinum Member
- Posts: 34695
- Joined: Wed Dec 10, 2008 7:42 pm
- Location: Lexington, Ky (TAMECAT territory)
Ditto DittoSDSSmith wrote:After reading the description and some of the reviews, I am wondering if they are selling the flat plate style or a dish shape. I would not expect a dish shape based on the description....I would expect a flat plate.
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
╟JPG ╢
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange