BigG CNC

**rodm** · 21st October 2010, 04:27 AM

Hi Daniel,

It is good to know that this is not unique to my machine. The Huyang (spelling??) are priced well but come with a lot of issues. I have been using Fuling up until this build and haven't struck anything like tihs.

Anyway after a long night and fingers crossed I have the problem solved. I tried lots of variations to keep the one power source but eventually I ended up running two power leads to the machine. One for the VFD/spindle and the other for computer, driver and air compressor. Interesting that it can be hooked into the same power point but the separation inside the enclosures seems to fix the problem.

The problem with this is I needed to rewire the electrical panel so that the Spindle switch operated with the new AC input. I hate having to tear things apart and rebuild them but I can't accept make shift arrangements either.

Well my saga seems to be over but I will need to test it more before I gain confidence that is it fixed for good.

I think there was actually two issues - electrical noise and back current when the spindle run down. Anyway I hope tihs helps others and they can plan for it when they build a machine.

**Check twice!** · 21st October 2010, 05:16 AM

Hi Rod

In my limited amount of knowledge of electronics, I have found in past circumstances we had to put a surge protector with a built in filter, cleaning the AC coming to the unit.

The equipment we have (vending machines) has a small controller board and at times was picking up noise off the AC. The machine would do strange things like empty machine product, payout all the change in changer, freeze,,,,, strange things happen in Canada

The protector did help us clear our problem but was a little pricey.

If my old mind serves me correct you run on 220 AC and here we run on 110 or 220 AC, maybe my problem is just a North American problem.

Food for thought!

John

**rodm** · 21st October 2010, 12:13 PM

Hi John,
We are on 250 volt 50 cycle here and just as prone to problems as your supply I would say. That would be funny to see a vending machine empty all the change - over here they usually eat your money and not give out the goods or just pass the money through to the change drawer.
This side of the electrickery is black magic and very hard to track for me. Lucky I have a couple of friends who are electronic wizards.

**spidey4fun** · 21st October 2010, 08:35 PM

Hi Rod, So you solved the problem by using a separate power lead? I've not come to this yet, but am gathering info for possible issues.

Brad.

**rodm** · 21st October 2010, 08:56 PM

Hi Brad,
Yes all good now.

In a way it was a good thing as I was right on the limit of 10amps for one lead. Computer, Monitor, air pump, driver board power supplies and 6 amp spindle soon adds up so dividing it was a benefit.

As for the mumbo jumbo electrickery problems it is black magic and I am glad I have a mate I can call on when I exhaust my efforts. Knowledge is a wonderful thing and they do more in one hour than I do in a three nights.

I do know next time around I will arrange my high voltages to have EMI filters isoltaing every component of the machine. While some of these do not generate any problem themselves it only needs one component eg VFD to induce problems.

All my VFD's prior to this have been metal cases so less EMI has leaked out. You get what you pay for with the cheaper ones on ebay but if you are aware of it you can plan around it.

**rodm** · 23rd October 2010, 02:08 PM

Well four months later it is finished.

What next ????

**Greolt** · 23rd October 2010, 02:22 PM

Originally Posted by rodm

What next ????

OMG ... Maybe it's time I had a word with Leonie about getting you some professional help.

Another extremely well presented machine.

I hope you are charging enough for these masterpieces.

Greg

**rodm** · 23rd October 2010, 03:02 PM

Hi Greg,
Leonie has given me up for a lost (in CNC) case.

There isn't any money in making these but it was something I was trying out to see if it was a retirement prospect. This is my last attempt at that.

I will probably spend my time looking at tool changers and other add ons that might be more viable.

**Gaza** · 23rd October 2010, 03:17 PM

amazing job,

how about a 5 axis

**rodm** · 23rd October 2010, 09:21 PM

And the all important video

[ame="http://www.youtube.com/watch?v=-bt7wCyI4do"]http://www.youtube.com/watch?v=-bt7wCyI4do[/ame]

**jb2060** · 23rd October 2010, 10:16 PM

Wow Rod ! that is just sensational. Really tremendous.

cheers, Jason

**Ch4iS** · 24th October 2010, 01:40 AM

Awesome work as always rod, first class quality.

Originally Posted by rodm

What next ????

Well you did mention a cnc plasma cutter earlier

**WillyInBris** · 24th October 2010, 06:46 AM

Originally Posted by Gaza

how about a 5 axis

Cmon rod you can do it

**gatiep** · 25th October 2010, 12:59 AM

Hi Rod,
Another perfect Rod built CNC! I'm really honoured to have been present while it did its first cut......amazingly solid, quiet, extremely functional, fantastic control panel ...............HEY GUYS IF YOU THINK THAT VIDEO IS FANTASTIC, I CAN TELL YOU THAT ITS NOTHING COMPARED TO THE REAL THING! I believe that this build knocks spots off most commercial units I have seen. This is a professional machine if ever I have seen one.
Well done Mate!

Quote """Well four months later it is finished.

What next ???? """

I know a guy with all the bits and pieces for your next build! Lol.

**rodm** · 25th October 2010, 02:05 AM

Hi Joe,
I thought you would have had a crack at me for using nice shiny stainless cap screws but having said what you have I am caught a bit flat footed. Maybe that was your tactic.

Always good to have you around and glad you saw the maiden run (as well as BigG operating). High risk running a machine for the first time but we struggled through it without any hiccups.

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