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Old 06-22-2007, 05:48 PM   #1
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Default Lathe Help

Hey Guys,

I have a com lathe with a carbide cutter. Problem is, when im cutting my com the whole thing just stops..........Im running it at 5v with a 540 motor......do i need to sharpen the cutter?(how?) or do i need to run it at a higher voltage?

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Old 06-22-2007, 05:56 PM   #2
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some will probably disagree with me....but I would recomend just getting a diamond bit as soon as you can....if you get one you wont ever have these kind of problems...

later,

Sean
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Old 06-22-2007, 06:33 PM   #3
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yes i agree with you but soon i will be going to brushless.......i only need a solution to this so i can finish off the last few weeks of the pointscore.....
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Old 06-22-2007, 06:35 PM   #4
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Get a Integy Lathe Motor 55t
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Old 06-22-2007, 06:39 PM   #5
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Just a guess, but are you using a Duratrax Ice to power it?
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Old 06-22-2007, 07:19 PM   #6
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Default Lathe issues!

What slave motor are you using. Even with a dull carbide cutter it should cut something. I only take .0005 at a time at 2 volts,which is half the distance between the lines on the scale of the wheel. Using the proper motor it should cut something even at 2 volts. Like the previous comment a high turn such as a 55 turn motor is the proper slave motor to use. Lots of torque!!!
A sharp tool bit is important, under a magnifying glass the tip of the cutting edge is rounded or chipped this will cut but leave a bad finish. One last thing,
make sure the motor is rotating in the right direction. Rotating into the flat side of the cutting edge!
Just my 2$
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Old 06-22-2007, 07:33 PM   #7
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Right, & also be sure that whatever you use as a power supply for it can supply enough amps to keep it going(& as they said, 10 amps without having something like Integy's 45 or 55 turn motor as the slave could be the reason why it stops, slave motor may be needing more amps to keep turning & it can't get it)......
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Old 06-22-2007, 07:52 PM   #8
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the ice motor run in is ove loaded use a turbo to cut the com to much load
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Old 06-22-2007, 07:56 PM   #9
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I think there is something wrong w/ ur 540. try a different motor... should be no problems.
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Old 06-22-2007, 09:05 PM   #10
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you can use 1500 fine grit sand paper to sharpen your carbide, never alter the angles and make sure that you do not round the edges as you can never sand them down far enough for it to sharpen again.

cut very little at a time and always lubricate the commutator and carbide, the sharpie trick works well on lubricating as well what you do is you cover the comm with sharpie, you can always add more lubrication by placing additional oil into the comm and the v blocks then cut VERY little at a time until all the blank ink is gone.
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Old 06-22-2007, 09:53 PM   #11
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thanks for the help guys........ill try a few of the things mentioned and it should be solved....

Cheers
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Old 06-25-2007, 05:12 AM   #12
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whilst on the subject of lathes, how often do you guys carry out maintanence to your slave motor? And what would your schedule be for it?

Blast out the slave motor with motor spray and oil the bushings with a drop of oil? Got my lathe 2nd hand so im not sure when it was last serviced.

thanks for the advice
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