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Forum topic by Xodus posted 1267 days ago 829 views 1 time favorited 9 replies Add to Favorites Watch
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Xodus

94 posts in 1720 days


1267 days ago

Topic tags/keywords: question lathe

Several months ago I picked up a craftsman wood lathe and the tools the gentleman had who I bought it from. I just recently tried to test turn a piece of wood, just wanted to see how the lathe worked. The test was an epic fail, when I bring the tool to the stock it just bounces and then stop the wood from turning. The tools were fairly sharp but could use some TLC. I just recently bought some brand new pen turning tools which are very sharp, went and tested on the lathe again, same results.

Any ideas on what could be the problem? The belt is on the large pulley on the lathe side and the smallest pulley on the motor side, The stock turns counter clockwise (towards me). I appreciate any and all advice.

Thanks for taking the time to read and/or respond


9 replies so far

View PurpLev's profile

PurpLev

8476 posts in 2246 days


#1 posted 1267 days ago

is the stock still square? in which case you’ll have quite a bit of bouncing of the tool until you gt the stock rounded off. you could use a hand plane/ saw to bring the stock as close as possible to round to ease the rounding-over step which will also minimize the amount and hardness of the bouncing. hold tool FIRMLY to the rest, and take light cuts until the stock is round, and the cut is continuous.

did you sharpen your tools, or just used them out of the box? even though they may seem sharp – they might still be not-sharp-enough (just a thought and a guess since I’m not sure what you did/nt with your tools).

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View CharlieM1958's profile

CharlieM1958

15655 posts in 2816 days


#2 posted 1267 days ago

Is the piece of wood you are attempting to turn already round, or does it still have square edges?

It is helpful to round off the edges of a blank on the band saw if possible before mounting it on the lathe. You can mount something with square edges and turn it, but the trick is that you must bring the cutting edge to the workpiece VERY slowly, so that when it first makes contact you are only taking off a tiny bit of material. Bringing the tool to the piece quickly will almost always have the result you are describing.

-- Charlie M. "Woodworking - patience = firewood"

View Elksniffer's profile

Elksniffer

74 posts in 1995 days


#3 posted 1267 days ago

What kind of a drive (spur, live)are you using? Is the belt slipping or is it the wood turning just stopping and the drive is still turning?

View Woodturner66's profile

Woodturner66

76 posts in 1269 days


#4 posted 1267 days ago

I would start with a spindle roughing gouge. Slow Speed at first. Make sure the tool rest is about a 1/4 inch from the corners (If Square). Slowly raise the handle until it makes contact. Turn the handle about 15 degrees to the right and move the tool to the right. What you want to do is turn the Woodturner shift as i call it. Where you move your body left or right with the handle on your hip.

This might give you an Idea. http://www.youtube.com/watch?v=EnOgM8zdVfg

-- Chris Ward

View Xodus's profile

Xodus

94 posts in 1720 days


#5 posted 1267 days ago

When the piece stops, the belt and motor are still moving. I am using a Spur drive with a woodriver 60 degree live center.

View CharlieM1958's profile

CharlieM1958

15655 posts in 2816 days


#6 posted 1267 days ago

The next question: When the piece stops, is the spur drive still spinning? If it is, then your piece is just not seated firmly enough on the drive. If the spur drive is NOT moving when the piece stops, then the taper is not seating properly.

-- Charlie M. "Woodworking - patience = firewood"

View Xodus's profile

Xodus

94 posts in 1720 days


#7 posted 1267 days ago

@CharlieM1958 – the drive spur is not moving when the piece stops.

View Woodturner66's profile

Woodturner66

76 posts in 1269 days


#8 posted 1267 days ago

View Loren's profile

Loren

7230 posts in 2246 days


#9 posted 1267 days ago

The set screw that fixes the sheave on the headstock drive shaft
may be loose.

-- http://lawoodworking.com

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