Interesting, and good result!

The main thing - is easy to work and stable result!
I now load video on youtube. It will be loaded - I will lay out the reference.

And here cut&grind-skateboard in a position of 45 degrees. And result.

Here a videoclip: http://www.youtube.com/watch?v=tnAmCa7islE

Rail
 

That is some very nice rail grinding.

Dmitry,

I just came across your thread here and noticed that in the pictures of post 6 (I think) you ground the shielding if the control cables from the BoB to the drivers on the cooling plate. This is incorrect. Officially they should be grounded on the BoB site, see this post http://www.mechmate.com/forums/showt...69&postcount=2

great build, I like to pictures, and I wish my rail grinding was that good!

Ries

Ries, there is nothing wrong with the way in which Dmitriy is grounding his Bob shields. Do you want to discuss it further in another thread?

Very nice grinding!

Hi Dimitry,

You built yourself a rail grinding monster !:) ...but with good results.
Nice building so far.
Good luck!

Greetings
Claus

Thanks all for kind words:) Here an end result. X-rails are completely finished. Y-rails I will do again - better...

And it is my relay board and its scheme.

@Gerald & Dmitry,

I think I did see that the shielding of the control (BoB to Drivers) is attached to the cooling plate of the drivers, I cannot enlarge the picture to confirm. it would be better to ground (put on the 0V side) the shielding on the Bob side.

if you want we can discuss this on a other thread, I am far from a authority though in this subject and haven't been doing electronics design for over 12 years.

Ries

Greetings, Ries.

I do not understand, what problems? Try to draw a wiring scheme of it.

Dmitriy,

shielding of signal cables should be done at the signal source, in this case on the BoB (PMDX) side, not on the gecko side.

Shielding the signal cable on the cooling plate of the gecko driver might even introduce more nasty effects (EMI) because usually this ground is what's called dirty.

Since the ground of the power supply is attached there, and the gecko's are connected to the power supply (high current) this might introduce more EMI then not shielding at all.
Also EMI in the ground plate might come from external interferences outside of the box it's not 0V! and might contain any other fluctuations from for example plasma welders, drills, saws etc.. So don't use a dirty ground for shielding signal cables.

Beside, from computer tot BoB is electrically connected, but from BoB to Gecko it's isolated using opto couplers (on the gecko side) . So it's best to keep this circuit as much separated as possible.

Lastly, and this is what gerald also mentioned, reducing EMI in your signal cables can also be archived by:

1) Not lying the signal cables and high power cables (110V, gecko power, stepper cables) close next to eachother in one line, it might look better, but it can introduce a lot of EMI in signal cables. Lay thm as far away from each other as possible, left, rights side of your control box for example and in separate cable ducts to insure separation.


2) If you do need to cross (in space) signal cables then do so in a 90 degree fashion, so
they cables don't 'see' each other. This technique is also frequently used in RF circuits where coils need to be layed out 90degrees from each-other to minimize interference.




Ries

Ries, many thanks for a competent substantiation. I think, already soon I can check up it in practice :) And unnecessary contact pieces to cut off is never late.

Dmitry

27-04-2010.
Greetings to all builders MechMate.

After a long break I had a possibility to continue work on the machine tool. Result on a photo.

27-04-2010
Time has come to take in hands this...

I like the wind-up piece between the table legs.:D
Is RED the official colour of MM's in Russia.... looking smart

Those Motion King's are looking good on the belt reduction

Red and Cherry :)

Дмитрий молодцом !!! Я с товарищем такой же собираю. Ток покрашу по другому.

Dmitry the good fellow!!! I with a companion same collect !!!Only I will paint on another))))))

Nice Work Dmitriy!

Almost there! Keep it up!

Looking Great !!!! Keep up the great work !!!

Your shop is scary:eek:

Dmitriy, your build is looking real good. Those belt drives are nice and looks like a very polished design.

Charles, I was just about to say the same thing but my shop looked a little like that until I cleaned it out. I'm sure a fresh coat of paint on the wall would make a huge difference.

Greetings to all!

It seems, I have finished a layer pad of wires "on a paper". Here my scheme of MM
http://img-fotki.yandex.ru/get/4301/..._aaae94db_orig

Dmitriy, what software did you use to draw out this layout, I haven't gone thru the circuit- but a good effort i feel.

Hi, Irfan.
One of my trades - the designer. Therefore I professionally own Corel Draw and Adobe Phonoshop. In most cases I use these programs - for me so more conveniently and easier. Also I use AutoCad and many other programs.

Thank you Dmitriy, now you can cut those beautiful designs on corel with the MM

That drawing should be part of the mechmate parts, beautifully done!