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Author Topic: 9x20 Chinese Lathe Conversion  (Read 88534 times)

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Offline Hood

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Re: 9x20 Chinese Lathe Conversion
« Reply #80 on: June 30, 2012, 12:18:54 PM »
Just have to try messing with different numbers and see how you get on. Set the I low, maybe 5 or so and do manual tuning and set the P in increments of 100 and see what you get. If you get it sounding kind of half decent then increase the I a bit at a time and see how you go.

Hood

Offline Dan13

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Re: 9x20 Chinese Lathe Conversion
« Reply #81 on: June 30, 2012, 12:21:10 PM »
Found the problem finally :)!!! It appears that Autotuning is seriously broken in the Ultra 5000. Once you have used this feature the drive goes crazy and is virtually impossible to tune. After using the Autotuning you have to reset the drive in order to get things back to normal.

No this crazy buzzing has stopped for me and I can at least try and tune the system :)

Dan

Offline Hood

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Re: 9x20 Chinese Lathe Conversion
« Reply #82 on: June 30, 2012, 12:45:18 PM »
Thats good to hear :)
Hood
Re: 9x20 Chinese Lathe Conversion
« Reply #83 on: July 03, 2012, 08:13:22 PM »
I have used a vacumn cleaner hose from a dyson to cover the lead screw on the Z Axis on a 1440 lathe

Offline Dan13

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Re: 9x20 Chinese Lathe Conversion
« Reply #84 on: July 04, 2012, 03:49:35 AM »
You mean it fully stretches and contracts with the nut move? That's nice.

Dan

Re: 9x20 Chinese Lathe Conversion
« Reply #85 on: July 04, 2012, 04:24:41 PM »
Yes I cut it long enough to stretch and compress on both ends to keep the lead screw covered.  I also put plenty of grease in there.  I built this 3 years ago and can drill a 1.718" dia thru solid stock at .005" per rev.


Re: 9x20 Chinese Lathe Conversion
« Reply #86 on: July 04, 2012, 04:33:20 PM »
check out my videos on you tube under pqmcorp  4 videos of machines I have built from scratch  The lathe is now completed

Offline Dan13

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Re: 9x20 Chinese Lathe Conversion
« Reply #87 on: July 13, 2012, 03:41:25 AM »
Just watched your videos. You have one huge workshop there... and it looks so clean in the same time... I liked it. The lathe looks good too. In my opinion, with the Chinese stepper drivers, the motors or louder as compared to Gecko. And speaking of this, I would love to try out Granite Devices drives with stepper motors. They claim that they drive the stepper with a sine wave and I think it would make the motor run quieter and smoother. However, their drives are a bit expensive.

Dan

Re: 9x20 Chinese Lathe Conversion
« Reply #88 on: July 13, 2012, 01:08:53 PM »
I know my shop / equipment is larger than most hobby shops.  I am a 5 S (Lean) expert for my day job why it is clean and organized...  I used the chinese motors and drives from Keling Technologies because of price.  They work fine and when you are machining they cannot be heard.

Thanks for the comment and viewing my videos

Joe

Offline Dan13

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Re: 9x20 Chinese Lathe Conversion
« Reply #89 on: July 13, 2012, 01:48:50 PM »
Thank you for sharing, Joe.

Dan