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  1. Thread: EVS drill press

    by Tai Fu
    Replies
    97
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    13,379

    I don't know if there are different 2HP motors...

    I don't know if there are different 2HP motors out there that have totally different torque, but right now I got a bigger bandsaw that is impossible to stall anyways (the belt would likely slip...
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    A little off topic but I had just moved shop...

    A little off topic but I had just moved shop recently. I do not have a vehicle.

    I have a 3000lb milling machine, a 1000lb band saw, and various other doodads.

    The mill and the bandsaw and...
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    2,987

    Further update: I got the compressor running,...

    Further update:

    I got the compressor running, even under load.

    What I did was, use the static phase converter to start the bandsaw, then try to start the compressor. The compressor would start...
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    You will need to figure out how much electricity...

    You will need to figure out how much electricity rate is in your area as it varies enormously. California for example has really high utility costs while other state may cost less.

    In Taiwan...
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    I think it really depends on what you have...

    I think it really depends on what you have available. As much as I'd love to use red/white oak or maple, they are not grown in Taiwan and therefore expensive. If I have to choose I'd use Taiwan...
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    2,987

    Update: I bought the RPC from guy but the pony...

    Update: I bought the RPC from guy but the pony motor for some reason is frozen shut and when I try to start it up the breaker would trip. It's been sitting in storage for like 8 years and I can see...
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    2,883

    Update: I bought 3 VFD's for each of my tool and...

    Update: I bought 3 VFD's for each of my tool and for the air compressor, unless the motor is completely unloaded (meaning no back pressure during the startup sequence) the motor will not turn over...
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    2,987

    So essentially the more equipment you got hooked...

    So essentially the more equipment you got hooked up to your RPC the more powerful it becomes? Essentially every spinning motor becomes its own 3 phase generator?
  9. Replies
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    Actually I do have a question... So let's say...

    Actually I do have a question...

    So let's say you got a rotary phase converter running. But you want to start something that may have a higher load. I heard of people using multiple idler motors...
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    2,987

    The thing is, because with a VFD (especially one...

    The thing is, because with a VFD (especially one that is a bit undersized) the VFD can't supply the necessary current during starting since the cylinder pushes back quite hard with a few rotation. It...
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    2,987

    Update: Got the RPC moved into the new shop....

    Update: Got the RPC moved into the new shop. Thing is ****ing heavy, weights at least as much as the compressor itself, if not more heavy. If this won't drive the compressor not sure what else will.
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    2,987

    Tried that, it didn't work. I played around with...

    Tried that, it didn't work. I played around with various startup times from 1.0 seconds all the way to 15 seconds, and if I don't bleed the output so the motor starts under no load, it will either...
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    2,987

    I asked the seller... he said I need vector...

    I asked the seller... he said I need vector control type VFD for compressors... The one I got wasn't that type...

    I'm returning them because someone is selling me a rotary phase converter with a...
  14. Replies
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    2,987

    Yes it is, it says it's "3KW" but really it has...

    Yes it is, it says it's "3KW" but really it has an output amp of 14 amps, which matches my motor's full load amp. But I can't start the motor hard on that VFD at all without it overloading, it will...
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    2,987

    I think the problem I am running into is that the...

    I think the problem I am running into is that the VFD won't ever provide enough juice to get a motor started under load (as it seems for an air compressor the load gets higher and higher until a...
  16. Replies
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    2,987

    air compressor VFD control

    So I am moving to a shop without 3 phase and the VFD I bought works, but it must soft start for 2 full seconds, in the meantime it must not have any back pressure (any shorter and the VFD will...
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    2,883

    VFD sounds so much cheaper. I was able to buy the...

    VFD sounds so much cheaper. I was able to buy the three my machine needs for only 200 dollars. But my mill has 2 3 phase motors, a main motor and a coolant pump. However as I machine wood quite a bit...
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    Update: I ordered 3 VFD for my machines. I figure...

    Update: I ordered 3 VFD for my machines. I figure that running them on single phase is always an eventuality and having brake and speed control is always a plus. Brake is not needed on the mill as it...
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    So you can't use the resaw blade to trim bowl...

    So you can't use the resaw blade to trim bowl blanks?

    Just don't make curved cuts, but faceted cuts.

    I'd say a 14" bandsaw is about minimum and even then, it's really not good for cutting more...
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    An addendum: If anyone is interested in these...

    An addendum:

    If anyone is interested in these Chinese carbide bandsaw blades, I can order them on your behalf. However you must give me your measurements in millimeters as they do not do inches...
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    Well thing is, I could very possibly just buy ONE...

    Well thing is, I could very possibly just buy ONE 5HP single phase motor, which will likely be 50% more than a 3 phase motor of the same power (or I could buy a lower HP one and lose out on resaw...
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    Price scales are different in this part of the...

    Price scales are different in this part of the world, but I think I can get VFD's for them fairly cheaply through Taobao. However one is an air compressor and I have to figure out how to program it...
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    rotary phase converter

    So I'm going to move into a place without 3 phase power. Problem is 3 of my machines are 3 phase...

    So I'm just wondering how do you size a rotary phase converter? Some said it has to be like 3x...
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    They all have this kind of tooth profile, I think...

    They all have this kind of tooth profile, I think that is what allows it to have no set at all. So I don't think that kind of sharpening will work. You will have to grind the front of the teeth to do...
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    https://item.taobao.com/item.htm?spm=a1z09.2.0.0.1...

    https://item.taobao.com/item.htm?spm=a1z09.2.0.0.14c92e8dtAxKDP&id=520363678541&_u=12023lrtq5d09c

    This is the link to the Taobao item... currency is in RMB.
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