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    Fusion 360 replacement

    I use Design Spark Mechanical. It is free, does 3D and outputs 3d printer files. I also sometimes use FreeCAD. Dazz
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    VFD Wiring

    Hi I went through a detailed selection process for my own application and ended up with a Yaskawa vfd for my latest retrofit. It is not the only good brand of industrial equipment but they are available in most countries. I would steer away from used vfd's because the key components have a...
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    VFD Wiring

    Hi My Denford Viceroy lathe is fitted with an ABB industrial vfd. My other lathe is fitted with a Yaskawa V1000 3.8kW industrial vfd. The V1000 series is available in a wide range of power outputs. I abide by my own advice. If you can, I recommend buying a Yaskawa or similar...
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    VFD Wiring

    Hi I replaced the Vee belt drive with a poly-vee to avoid problems with belts. The second part of the drive still uses a poly-link belt. Denford VFD retrofit. If you can spare the cash, try and use an industrial grade VFD. Once you get over the one-off damage to the bank balance, it is all...
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    Mitutoyo or Starrett?

    Hi I use OriginCal calipers. Good value for the money. I have made over 1000 purchases on Aliexpress. There is a lot of crap there, including many items that have brand names but probably haven't passed QC tests. I aim for mid-priced items. Definitely not the cheapest. If you pay 50%-100%...
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    Most efficient steam engine design?

    Hi Condensing steam does more than just recycle water. If done right, it creates a reduced pressure on the engine exhaust to below atmospheric. This improves engine power and efficiency. Condensed steam would need filtering before it could be put back in the boiler. There is a steamboat...
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    Most efficient steam engine design?

    Hi There are two parts to thermal efficiency in the cylinders. There is the net flow of heat out of the cylinders. There is also the alternating heat loss as hot steam enters the cylinder, expands and cools and energy is extracted, then leaves through the same ports. In both cases, efficiency...
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    Trouble with cut off operations

    Hi You could make a gauge for your lathe. http://denfordata.com/bb/viewtopic.php?f=14&t=705 Dazz
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    Myford lathe

    Hi The Myford was a great choice when disposable income and available space were limited. A lot of amazing things have been made with Myfords but I chose not to buy one. I had the space and the $$ to buy something better. That is not to say that Myfords are a bad choice. They just don't...
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    Myford lathe

    Hi I don't have a Boxford or a Myford, but I have used both so I think I can offer a reasonably balanced opinion. The Myford is versatile and if you get the accessories, it can do a lot of things. The Tee slot cross slide is a particularly good feature. So good that a previous owner made an...
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    scaling Steam path dimensions

    Hi I have copies of the original factory drawings for the 1925 Yorkshire Patent Steam Wagon that I plan to model. I have figured out that the easiest way to build a model is to simply scale and follow the factory drawings. The manufacture was highly optimised based on contemporary methods...
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    scaling Steam path dimensions

    Hello I am planning on building a 4" scale compound steam engine. Changing the linear scale by 1/3 affects area by a factor of 1/9 and volume scale by 1/27. Physics doesn't scale so I am concerned that changing the linear scale may require modifications to the steam path dimensions...
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    Variable speed control for a small lathe

    Hi The thing that often gets left off the glossy brochures is that the best frequency to run a motor on a VFD is rated mains frequency. Above this freq the motor is power limited. Below this freq the motor is current limited. I have a 3.7kW industrial Yaskawa VFD on my large lathe. I use the...
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    new broke machinist building an entire shop ground up!

    Hi Have you considered joining or opening a Menzshed. There are Menzsheds in many countries. They exist for people like you. Dazz
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    Back at it. Lost pla cast iron ceramic shell

    Hi I have never cast any metal but my research indicates that the burnout environment is important. Oxygen is required to convert the carbon to CO2 rather than just leave a carbon deposit. This points to an electric kiln, with drainage, being a much better choice for burn out than a fuel fired...
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    Back at it. Lost pla cast iron ceramic shell

    I suspect the ceramic is porous enough to let gas escape.
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    Back at it. Lost pla cast iron ceramic shell

    Hi Have you considered/tried wax filament?
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    DIY Electronic Lead Screw

    Hi This guy has created the best DIY electronic lead screw I have seen on the Internet. It should be adaptable to similar applications like electronic tool grinder, rotary table, gear cutter, etc. Dazz
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    VFD Wiring

    Hi I haven't read all the posts but I just want to reinforce a couple of points. Firstly, don't expect to reuse any of the existing control and protection circuitry. You should aim to reuse the hands-on switches, but not the relays, fuses and other stuff. Secondly, there is no substitute for...
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    T type cut-off tools

    Hi I think the root cause of many problems with parting is flank wear on HSS cutting blade. This tends to taper the flanks so looking from above, the tool is narrower at the cutting edge end. As the tool gets deeper into the work piece, the friction increases until disaster strikes. The...
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