Hello all. I am just a beginner on a metal lathe and have a question about a shudder in a 1030V Precision Mathews lathe. It starts at 525rpm to 625rpm then smooths out to its maximum rpm. I have leveled the lathe (no twist) and checked run out at the chuck and it's 1.5 thousandths. The lathe is mounted on a well-supported wood bench attached to shop wall. Any idea why this is occurring? Thank you.
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1030V rpm range shudder.
- Thread starter danm2116
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this was just an issue with someone else. You have a VFD issue. PM directed the other owner to make some changes in the settings.
What causes this behavior, and how to correct it? PM 728 VT
I was milling some mild steel for the t-nut of my QCTP when I noticed a certain skipping noise. so I grabbed several short videos that i spliced together a 20-second video to show it. See for example at 2 seconds, 10s, 13s (this is the most pronounced, the whole spindle seems to jerk quite...
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I think it's a different video- that one is for a mill
it's this one: (fix at post #100)
The early machines had a DC brush motor, later ones may be brushless
it's this one: (fix at post #100)
***Resolved*** NEW PM-1440HVT-2 Lathe (PM fixed it)
Not sure if the 1030v has a vfdThe early machines had a DC brush motor, later ones may be brushless
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***Resolved*** NEW PM-1440HVT-2 Lathe (PM fixed it)
I just saw a video they attached to my email and it showed them with a micrometer and how much play is in those gears and it looks to be good. There's not a belt tensioner on this. It has that what I'd call an idler wheel that gives it the tension. I almost want to take your bet Mr. Best but I...
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yep, probably vfd still.
I had the same problem when I bought my lathe about 20 some years ago
Its a 12x37 asian lathe brand new
Just avoided the speed at which it occured(tried leveling and bolting it to the floor first)
Just bought a different chuck mounted it on the same backplate it fit with no machining
runs smooth no shimmy at any speed
dont know if this applies but might be worth looking into
Its a 12x37 asian lathe brand new
Just avoided the speed at which it occured(tried leveling and bolting it to the floor first)
Just bought a different chuck mounted it on the same backplate it fit with no machining
runs smooth no shimmy at any speed
dont know if this applies but might be worth looking into
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Lathe uses a DC drive, so no VFD. If it does not occur with the chuck removed then it is a chuck balance issue. Almost any variable speed machine will have a resonant point and vibration will be less below and above that point. Problem with the PM-1440HVT-2 Lathe VFD is an isolated incident most likely because someone programmed the VFD incorrectly, I have worked with numerous other versions of that lathe with Yaskawa VFD and never saw an issue. Only time was when the basic motor parameters were incorrect and also the sutotuning was not done.
I will take the chuck off and try it. I have always avoided that rpm range ant it works fine. What make of aftermarket chuck would be the choice to replace the factory chuck to aluminate the shudder? This lathe is about 4 years old.
What is a VFD?
What is a VFD?