[tooManyHobbies]

Wow.
http://uemfab.blog.com/2012/05/08/ov...s-cnc-machine/

[hive8]

I don't think that will fit on my bench top

[Turbo442]

+ - .2 mm at 100m? I wonder if that accounts for the curvature of the earth?

[hive8]

that would be 0.8mm over 100m , wonder how they deal with thermal expansion and such.

[graffix11]

Wow, now that is spectacular. Thanks for posting

[rowbare]

Yeah but it's only 9M on the Y so what good is that? :banana:

bob

[bobsch]

Love to see a video of it cutting. Must look like a huge mechanical spider crawling over the piece.

[RTTIM]

+ - .2 mm at 100m? I wonder if that accounts for the curvature of the earth?

Probably does.

Typically when you set up long span machinery you pick a reference frame (usually, but not always near the center of the machine) that is set with precision levels. The rest of the machine is then set relative to that reference frame using either optics or precision laser measurement systems for flatness and straightness. Optics are good down to a few thousandths of an inch and with lasers we can get down to 1 micron resolution or better.

[SkipW]

Love to see a video of it cutting. Must look like a huge mechanical spider crawling over the piece.

Here's a video of it in action.

EEW-PROTEC GmbH: Videos

What a beast!

[hive8]

The only thing missing on it is a wire cutter, like in the first video for the car and the Styrofoam would make cutting the ruff part much quicker

[wizard]

If nothing else this highlights that you don't need mass to build a machine. Of course there is no indication of machining steel here.

[asuratman]

What do you think how they extend cable for encoder if they use servo systems? I actually think if one want to build 2m X 6m plasma/router using servo and r&p system.

[neilw20]

For encoder runs of more than 3 or 4m you needs:
TEXAS INSTRUMENTS - AM26LS31CD. - IC, LINE DIFFERENTIAL DRIVER, RS422
or similar.
Without that, the encoder and all other signals won't survive the distance, unless you wish to run a bit slower than a turtle, or as fast as a snail.

[asuratman]

neilw20,
Can encoder cable just be extended more than 6 ft (factory installed) w/no problem on CUI AMT 102 using G320X? How long max encoder cable length? Thanks.

[neilw20]

Sure it can be run further, but if there are are any fields from motor wiring and other power wiring, which carries amps closer than a foot or so then the induced spikes in the encoder wiring exceeds the 2.4v threshold of TTL signals (5v supplied).

The differential driver has 2 wires instead of one, with the signal polarity in the wires is opposite.

If you add noise (N) to the differential signals (-S and +S) as interference on each wire (hopefully twisted) you get N+S and N-S.
At the receiver the signals are subtracted giving (N+S) - (N-S) giving N=0 and S=2S.

When the receiver subtracts the signal you get twice the signal and the noise is gone! Maths and physics working together.

A driver at $1.50 (4 channels) and an extra wire is needed.
And you need the same chip at the receiving end.
So you get 4 channels for $3.00. A fairly cheap fix.

[Al_The_Man]

neilw20,
Can encoder cable just be extended more than 6 ft (factory installed) w/no problem on CUI AMT 102 using G320X? How long max encoder cable length? Thanks.

Using RS422/485 the max distance is 4000ft and up to 10Mps.
BTW, CUI has a differential output optional.
Al.