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Type: Posts; User: Zorbit

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  1. Re: I need to partially dismantle and move a Bridgeport/Hardinge VMC1000/22 mill,

    Thanks Superman, I really appreciate your help with this.
  2. Re: I need to partially dismantle and move a Bridgeport/Hardinge VMC1000/22 mill,

    A crane company has said that they think they can set up a crane on the steep access road, lift the machinery from the concrete pad in front of the workshop, swing it around 180 degrees and place it...
  3. Re: I need to partially dismantle and move a Bridgeport/Hardinge VMC1000/22 mill,

    It's a nightmare job. The machine is in a workshop on top of a small hill, with one steep gravelly and potholed access road that obviously hasn't been maintained since the mill was installed 20...
  4. Re: I need to partially dismantle and move a Bridgeport/Hardinge VMC1000/22 mill,

    I can get a 7.5ton gross vehicle there, which means a 3 ton payload. The mill weighs a lot more than that, I may be forced to dismantle it, but I'm worried I might never get it accurately...
  5. Just to clarify, I'd love to reassemble this...

    Just to clarify, I'd love to reassemble this machine on a new site, although officially classed as scrap there's no reason not to get it running again.
  6. I need to partially dismantle and move a Bridgeport/Hardinge VMC1000/22 mill,

    And I really need a manual that covers the process as much as possible. Sadly, because of changes that have been made to local roads and buildings it is impossible to get an appropriate vehicle close...
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    Re: 4x8 (plus a bit) heavy duty router build

    Thanks for that explanation, it makes sense now I think about it.
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    Re: 4x8 (plus a bit) heavy duty router build

    That's a very different case though. I'm not an engineer, so open to education, but in the case of the triangulated truss sides of the router above, the diagonals are longer than the horizontals...
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    Re: 4x8 (plus a bit) heavy duty router build

    I love the trussed design, but have noticed that commercial designs don't often use it. My thoughts are that they are trying to keep temperature related expansion and contraction in-line with the...
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    Re: Should I keep this Huanyang GT-series VFD?

    If your controller is based on the Buildbotics, you might find some help in the manual;

    Buildbotics Controller Manual (V1.1)
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    Re: My CNC Router Build Adventure

    Start the thread with this one.....
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    Re: My CNC Router Build Adventure

    I know that common sense isn't your first language, but until now at least your English has been reasonably legible - sadly you've lost me now, not even Google could make sense of that lot.

    If...
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    Re: My CNC Router Build Adventure

    I'm really bored with this, tables for 1450rpm motors which actually state on them that higher speed motors will take less current don't help at all.

    Fact is that many people are happily using...
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    Re: My CNC Router Build Adventure

    If we're going to rely on imaginary figures then here's a 2200w spindle motor claiming to run at 6A

    2.2kw Air-cooled square spindle motor kit 2200w spindle 2.2kw 220V inverter ER20 collet air...
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    Re: My CNC Router Build Adventure

    Then it's not a 2200w motor.
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    Re: My CNC Router Build Adventure

    How much current do you think a 2200w motor needs ? That will be input power.

    2200 / (1.732 * 220 * 0.85 ) = 6.8 ?
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    Re: My CNC Router Build Adventure

    Indeed. Just because an inverter spec sheet quotes worst case scenario input current ( example: lowest input voltage, 200% motor overload condition ) doesn't mean the motor won't run perfectly well...
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    Re: My CNC Router Build Adventure

    I'm sure ABB will appreciate your help designing their next VFD.

    LVD-EOTN151U-EN_VFDs_And_Maximum-Inrush-Current.pdf (abb.com)
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    Re: My CNC Router Build Adventure

    This might go some way to explaining the ridiculous input current numbers:

    "That's a phenomenon that you only see pretty much in Japanese drives like Yaskawa, Mitsubishi etc, and is more of a...
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    Re: My CNC Router Build Adventure

    I've edited my post to reflect that modern PWM circuits handle inrush much better than older circuits, and I just looked it up, it can be 100 - 150% of full motor current. I think your approach of...
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    Re: My CNC Router Build Adventure

    It's a good guess. Inrush current can be very high on older designs. Quality circuits incorporate limiting devices such as NTC ( resistors that start at a high value which rapidly drops when they...
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    Re: My CNC Router Build Adventure

    You are confused. BTW I am a qualified electrician and ran my electronics repair company for 15 years, mostly repairing switched-mode power supplies, but don't take my word for it - just look and...
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    Re: My CNC Router Build Adventure

    JayneV, here is a thread from the UK covering the same spindles, with comments from JazzCNC who has built and sold many, many machines with them.

    Connecting 2.2kw vfd to Mains supply - Page 2...
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    Re: My CNC Router Build Adventure

    What planet do you live on ? Electricity must be different there.
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    Re: My CNC Router Build Adventure

    ER20 will be fine for most things. Being able to use 12mm tools is good, and loads of old 1/2" tools turn up cheap.
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    Re: My CNC Router Build Adventure

    Most people run these from an ordinary household supply with no problems, there isn't really 2.5kw of power evaporating in the VFD.

    Re the er11 / er20 - I'd go for the er20 for better tooling...
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    Re: My CNC Router Build Adventure

    The springs found on kids home trampoline would be a lot easier to use. Probably longer lasting too.
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    Re: Designing a new router called Brevis-HD

    In the UK we have Slot Drills too ( usually a two flute centre cutting milling tool ). They work quite well as emergency router bits.
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    Re: My CNC Router Build Adventure

    Leadshine are good enough that other Chinese companies counterfeit them.
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    Re: My CNC Router Build Adventure

    Definitely, it depends on what you're cutting. When I was cutting 6mm marine ply at the boatyard I was running a lot faster. Now I'm cutting carbon fibre and GRP.
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