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29-01-2020 #21
Thats why i laugh when someone says here on forum, he will buy the stuff and figure it out later. I make 3d model of what i make, then piece by piece simulate the assembly and still so normally a mistake or 2 happens.
I say : Figure it out earlier, buy rails and screws. Receive them. Check what is received. Then compare to drawing and continue the build.
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29-01-2020 #22
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30-01-2020 #23
If I'd been an avid reader of MYCNCUK before I ever set out to build my first plywood and allthread router a few years ago, the machine I have now would not look anything like the machine I have now!
An optimist says the glass is half full, a pessimist says the glass is half empty, an engineer says you're using the wrong sized glass.
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30-01-2020 #24
One thing I’m thinking of building is an engraver for spherical objects. I bought an Eggbot yonks ago to check out engraving on a sphere but it’s still in its box.
What I need to engrave for a long term project of mine is two hollow hemispheres. They are part of an Apollo navigation system.
The reason the hemispheres are hollow is because there are motors and sensors INSIDE them. There is a central disc with an axle going through the middle of it and a hemisphere on either side giving the appearance of a sphere. The disc then has axle point top and bottom and it then mounted in a C clamp and that is powered too... then the C clamp is rotated to give the third access.
I worked out all the control circuitry but the one thing that is holding me up is engraving the hemispheres. Both of them are half black and half white making it even harder.
Anyhoo, my point is I think a heavier guage Eggbot might do the trick... emphasis on the “mighty.
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30-01-2020 #25
I always plan out my builds before anything... the only exception is why I bought this spindle first as the machine will be built around it and it’s better to have an idea of sizes and wiring/plumbing requirements as I’ve never had a water cooled spindle before.
Also there is the learning factor. Learning what I need to do with the VFD (another thing I haven’t had before) surprised me when I read the manual and it clearly says to NOT use a contactor or it could damage the VFD. I’d watched people on YouTube use contactors in their build and would have made a big mistake if I hadn’t looked at the manual.
I know what I don’t know... and I’m missing a lot of info regarding the electrics at present. I will have to trawl through the site and look up as much info as I can... I already know I will be using the serial comms on the VFD for Mach3 to control and display spindle speed... but I’ve only found a 10 year old driver for the HuanYang... is that right?
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30-01-2020 #26
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30-01-2020 #27
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surprised me when I read the manual and it clearly says to NOT use a contactor or it could damage the VFD. I’d watched people on YouTube use contactors in their build and would have made a big mistake if I hadn’t looked at the manual.
If you do you might hear a big bang...Clive
The more you know, The better you know, How little you know
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30-01-2020 #29
Double up on that several times over!! NOTHING should come between the VFD and the spindle. Only ever use the spindle ON/OFF control wiring to stop the spindle if you ever want it to start again. I wouldn't even cut the mains input to the VFD with the spindle running, though that might be my clinical anxiety kicking in
KitAn optimist says the glass is half full, a pessimist says the glass is half empty, an engineer says you're using the wrong sized glass.
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30-01-2020 #30
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