From what I have gathered, in roughing you use a slow speed. Smoothing is a faster speed, while finishing is even faster. Mostly it seems that you use a SAFE speed for all. You don't want the work/lathe to vibrate, the tool to chatter or bounce around. Use the speed that works for you, the tool and the turning.charlese wrote:Of course - The answer to all of these questions is NO. If it is not necessary to know the specific rpms - by species or by diameter (surface speed) of the wood being turned. Why even is there any interest in RPMs at all?
I really don't know, Can someone explain? (Of course there will be more questions)
Rpm
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SS 500(09/1980), DC3300, jointer, bandsaw, belt sander, Strip Sander, drum sanders,molder, dado, biscuit joiner, universal lathe tool rest, Oneway talon chuck, router bits & chucks and a De Walt 735 planer,a #5,#6, block planes. ALL in a 100 square foot shop.
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Bob
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Yep! I am in complete agreement with Bob, Tom and Dwight in the last few posts. What aroused my interest in Specific RPMs were the earlier posts in this thread that criticized Shopsmith for not having RPMs etched or printed on the speed control.
In this criticism, it was noted that turning clubs (maybe just some members) think of the MarkV as a "Mickey Mouse" tool for not having RPM numbers on the dial. The reference was to indicate the letter speeds were of no use, or at best a poor indication of speed control.
My question is: So What!? Would a difference in a few RPMs make a difference in the action of the lathe tools? Yes, in some cases it could - granted!!! But would the performance of the woodworker be enhanced by knowing exactly what RPMs are being used? I really think NOT! Perhaps someone can explain why they think it is necessary.
I referred to turning in this question because that was the operation that was being criticized. I am fully aware that many lathes have only fixed pulleys and therefore fixed speeds. By changing pulleys one can change to another fixed RPM, but is it necessary to know what that RPM is? My thought is not really! Also I think fully variable speeds are a better choice than fixed speeds.
(I'm fully aware that different speeds (RPMs) are needed for the various operations of the MarkV, for effectiveness as well as safety.)
In this thread Paul M. Cohen gave several excellent answers on why Shopsmith has not done more than provide reference charts relative to RPMs. However I've not yet seen an answer as to why some woodworkers believe they must know specific RPMs.
That's my question here: Why the need to know a SPECIFIC RPM when turning wood?
In this criticism, it was noted that turning clubs (maybe just some members) think of the MarkV as a "Mickey Mouse" tool for not having RPM numbers on the dial. The reference was to indicate the letter speeds were of no use, or at best a poor indication of speed control.
My question is: So What!? Would a difference in a few RPMs make a difference in the action of the lathe tools? Yes, in some cases it could - granted!!! But would the performance of the woodworker be enhanced by knowing exactly what RPMs are being used? I really think NOT! Perhaps someone can explain why they think it is necessary.
I referred to turning in this question because that was the operation that was being criticized. I am fully aware that many lathes have only fixed pulleys and therefore fixed speeds. By changing pulleys one can change to another fixed RPM, but is it necessary to know what that RPM is? My thought is not really! Also I think fully variable speeds are a better choice than fixed speeds.
(I'm fully aware that different speeds (RPMs) are needed for the various operations of the MarkV, for effectiveness as well as safety.)
In this thread Paul M. Cohen gave several excellent answers on why Shopsmith has not done more than provide reference charts relative to RPMs. However I've not yet seen an answer as to why some woodworkers believe they must know specific RPMs.
That's my question here: Why the need to know a SPECIFIC RPM when turning wood?
Octogenarian's have an earned right to be a curmudgeon.
Chuck in Lancaster, CA
Chuck in Lancaster, CA
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JPG
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For it may or may not be worth! Actual "RPM"s are not a bible nor absolute standard to use. The setting of the proper speed (at the moment of need) is best determined by EXPERIENCE not some arbitrary dial setting or anything else! One may use the dial indicators as a rough approximation as a starting point, but the tool and work will tell you if the speed is "right". This comes from experience and not from some well meaning but sometimes arbitrary "instruction"!............AMEN!
By the way . . . what clock is this "site" using???? Seems a mite fast to me!!!!! My clock says 19:23 as I post this!!!
By the way . . . what clock is this "site" using???? Seems a mite fast to me!!!!! My clock says 19:23 as I post this!!!
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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
looks like your vbulletin prefs are set to Atlantic time. Or maybe DST time.jpg40504 wrote:By the way . . . what clock is this "site" using???? Seems a mite fast to me!!!!! My clock says 19:23 as I post this!!!
SS 500(09/1980), DC3300, jointer, bandsaw, belt sander, Strip Sander, drum sanders,molder, dado, biscuit joiner, universal lathe tool rest, Oneway talon chuck, router bits & chucks and a De Walt 735 planer,a #5,#6, block planes. ALL in a 100 square foot shop.
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dusty
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jpg40504 wrote:For it may or may not be worth! Actual "RPM"s are not a bible nor absolute standard to use. The setting of the proper speed (at the moment of need) is best determined by EXPERIENCE not some arbitrary dial setting or anything else! One may use the dial indicators as a rough approximation as a starting point, but the tool and work will tell you if the speed is "right". This comes from experience and not from some well meaning but sometimes arbitrary "instruction"!............AMEN!
By the way . . . what clock is this "site" using???? Seems a mite fast to me!!!!! My clock says 19:23 as I post this!!!
It seems to me that your computer might be set to display military time (24 hour clock). The time on your previous post to me was 5:19 PM which is 19:19 on a 24 hr clock. No apparent conflict!
Check here to see if you are setup correrctly. http://www.shopsmith.net/forums/profile.htm?do=editoptions
"Making Sawdust Safely"
Dusty
Sent from my Dell XPS using Firefox.
Dusty
Sent from my Dell XPS using Firefox.
The difference between 19:33 and 5:33 PM is two hours. I had to solve my time posting issue by checking the Daylight Savings in the "User CP" (Control Panel).
Although you don't have a problem with DST while in AZ, You do have a problem with the proper time zone. You can edit your time zone in the User CP (Control Panel) The CP can be reached from the red line above, - location, farthest to the left.
P.S. Had to find that place again to make sure. It can be found in the user CP, under "Edit Options", Then you have to scroll down to the time and date options. I had to have Admin help me out with my time issue.
Although you don't have a problem with DST while in AZ, You do have a problem with the proper time zone. You can edit your time zone in the User CP (Control Panel) The CP can be reached from the red line above, - location, farthest to the left.
P.S. Had to find that place again to make sure. It can be found in the user CP, under "Edit Options", Then you have to scroll down to the time and date options. I had to have Admin help me out with my time issue.
Octogenarian's have an earned right to be a curmudgeon.
Chuck in Lancaster, CA
Chuck in Lancaster, CA
dusty wrote:It seems to me that your computer might be set to display military time (24 hour clock). The time on your previous post to me was 5:19 PM which is 19:19 on a 24 hr clock.
Dusty, guess we're going to have to get you recalled to military service. 5:19+12:00=17:19.
SS 500(09/1980), DC3300, jointer, bandsaw, belt sander, Strip Sander, drum sanders,molder, dado, biscuit joiner, universal lathe tool rest, Oneway talon chuck, router bits & chucks and a De Walt 735 planer,a #5,#6, block planes. ALL in a 100 square foot shop.
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Bob
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Bob
Sorry I didn't see your URL, but couldn't resist reminding you that 19:19 is actually 7:19 PM. 5:19 PM would convert to 17:19 hrsdusty wrote:It seems to me that your computer might be set to display military time (24 hour clock). The time on your previous post to me was 5:19 PM which is 19:19 on a 24 hr clock. No apparent conflict!
Check here to see if you are setup correrctly. http://www.shopsmith.net/forums/profile.htm?do=editoptions
Octogenarian's have an earned right to be a curmudgeon.
Chuck in Lancaster, CA
Chuck in Lancaster, CA
a1gutterman wrote: . . . I AM "NOT" ADVOCATING SETTING HIGHER SPEED SETTINGS FOR AN TOOL THEN WHAT IS RECOMMENDED, I am simply stating that you only need to be close, but if the max speed setting is a concern for you, set the speed dial at "M" to stay under the 2500 rpm limit.
I have been lurking on this thread and somewhat amused at argument for an accurate RPM measurement. I am on Charlese side of the discussion FWIW. But what REALLY caught my eye is that Tim forgot how to spell KNOT (I added the quotes in the above quote). Just couldn't resist, Tim. Happy Holidays.
Dick
A Veteran-whether Active Duty, Retired, National Guard or Reserve-Is Someone Who, at One Point in Their Life, Signed a Blank Check Made Payable To "The United States of America", For An Amount of 'Up To and Including My Life'
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a1gutterman
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