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Thread: Importing a lathe to Aus
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15th Jan 2021, 09:49 PM #31I break stuff...
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Standard lathe problem.... As I alluded to earlier, the Hardinge and clones aren't big enough for me personally. But like you, that's only 10% of the time. I think that's probably the case for most people who 'need' 14+ inches of swing, or 40+ inches of bed, with the exception of some job shops - the unfortunate reality is that most of the time the smaller machine would be perfect, but of course we end up with the bigger machine for that 10%. Be nice to have unlimited space and money to have multiple sizes, but most of us aren't that lucky.
I have to say though, I've been interested by your lathe choices - you've moved from one machine that I've looked at before and thought was pretty good, to another machine that I've looked at before and thought also presented as a good machine if you were buying new. No personal experience with them, but a bit of reading up on Sunmaster in the past suggests it should be a good machine.
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15th Jan 2021, 10:01 PM #32Diamond Member
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G'day Bill, I was really just being a bit of a smart ar*e when I said that it may disengage but be a problem to re-engage, because I imagine that it would be very difficult to make half (ball)nuts operate without loosing balls every time it was operated. On the other hand it may be possible to use a rotary encoder on the carriage handwheel to drive the servos and ballscrew to operate the carriage just like you would with a rack and pinion setup on a conventional manual lathe. No doubt there are many good reasons why this approach has rarely if ever been used.
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15th Jan 2021, 11:01 PM #33Golden Member
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16th Jan 2021, 02:13 AM #34Diamond Member
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Clough42
For those contemplating DIY electronic leadscrews Clough42 on youtube has a very in depth series of videos about the process.
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16th Jan 2021, 06:15 PM #35Senior Member
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I primarily look for quality and precision. The collets in the Hardinge (CycleMatic) have extremely low runout so second ops are a non event. I have seen tests of no discernible movement on a 1 micron test indicator. I don't need that good but it sure adds to the lust factor.
It remains to be seen how good the SunMaster will be but i do expect it to be as good as i want. The machine will need to be ordered as I want options that are not common such as 240v, higher spindle speeds and CSS. That means it will be several months before we see just what it can do. As i have a lot of quality 5C collets I will obtain a D1-6 adapter and probably grind the taper to suit if it isn't up to what i expect.
When I have had it for a while i will post my thoughts and results for the tests i do on this forum as the brand doesn't seem to be reviewed a lot although it is rebadged by many so reviews can only be found with some effort.
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16th Jan 2021, 07:45 PM #36Diamond Member
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The sunmaster looks like a good machine. very similar to the Acra we have at work which has been a fantastic machine. I see the variable speed model is listed as the same HP as the geared model, it might struggle for torque at low RPM.
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16th Jan 2021, 07:56 PM #37Senior Member
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16th Jan 2021, 10:45 PM #38Gear expert in training
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19th Jan 2021, 08:48 PM #39Senior Member
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19th Jan 2021, 11:08 PM #40Diamond Member
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20th Jan 2021, 07:52 AM #41
Mike (you old bugger you)
You WILL definitely need to rewire your shed and possibly upgrade the feed-in from the street.
A single phase 10 HP motor will draw a shade over 31 amps when running. On start-up the motor will probably draw over 90 amps -- more than enough to throw the main switchboard breaker. Main switch board means what I said rewiring your shed will have to go back to the point where your power comes in from the street. Depending on where you live, the single phase wire from the street is possibly limited to 70 Amps.
I'll let you decide if you want/need to change the order to a 3 phase motor. But me thinks a 3 phase motor and 4th wire from the street will be the less expensive total cost option.regards from Canmore
ian
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20th Jan 2021, 06:23 PM #42Senior Member
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20th Jan 2021, 06:37 PM #43Most Valued Member
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20th Jan 2021, 07:01 PM #44Most Valued Member
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Thats exciting. I'm excited for you. It will be a long wait I bet!
Simon
Sent from my SM-G970F using TapatalkGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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20th Jan 2021, 08:13 PM #45Diamond Member
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congratulations, it will be good with a 10 hp motor, make sure you give us a review when you get it.
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