Connecting controller to Gecko G251

[Greolt]

Yes you are right the Chinese manuals can be a bit light.

I am happy to hear your commendation of Marco's support.

I am still very much leaning towards getting this controller. My laser is still under construction.

The other controller option (Retina Engrave) has almost no supporting documentation that I can find.

Initially I was concerned with the DSP being tied exclusively to Corel and Autocad, but reading a bit more it looks like Lasercad can import all types of files.

I can always build an inverter circuit for the signals if it came to that.

Thanks Itran2000

And thanks Marco for responding to my messages

Greolt

[wctx1977]

Yes you are right the Chinese manuals can be a bit light.

I am happy to hear your commendation of Marco's support.

I am still very much leaning towards getting this controller. My laser is still under construction.

The other controller option (Retina Engrave) has almost no supporting documentation that I can find.

Initially I was concerned with the DSP being tied exclusively to Corel and Autocad, but reading a bit more it looks like Lasercad can import all types of files.

I can always build an inverter circuit for the signals if it came to that.

Thanks Itran2000

And thanks Marco for responding to my messages

Greolt

There is no doubt that Marco will do the best to help and give you the best advice and support possible for the products that he sells and we should consider that he has to work between the programers and he reliefs a lot of load from them . Also we need to understand that he is collaborating with a chinese manufacturer (I THINK is chinese ) and he is working hard to develop a better instruction manuals for us to use. Is there any other commercial controller in the market similar or better than the DSP for less than $500.00? I don't think so!! not even close to this price. So please lets be patient with him and work together to get a better experience. Edgar G

[ltran2000]

Greolt
If you are in design your new laser, be careful to keep high voltage away
from metal frame and ground the frame, it happen to me the highvoltage sparked to metal and destroy 2 250 gecko drivers,I recomment dsp over rectina,once you send the job to dsp you no longer need window running, no worry about disconnect issue like rectina or smoothstepper, I have use 2 2011 dsp,and already ordered 2012, but seem like 2012 has more problem than 2011,yes you can import almost any file format.if you need any helps let me know. ltran2000

[Greolt]

Greolt
................I recommend dsp over retina,once you send the job to dsp you no longer need window running, no worry about disconnect issue like retina or smoothstepper.

That is a very good point that you make. I see that as a substantial advantage

.............but seem like 2012 has more problem than 2011.......

I guess it is a new version and needs time to work out these glitches.

Greolt

[ltran2000]

yes once I use DSP I don't want to go back the controller that depend on window , another good feature of LO DSP is you can change speed and laser power at middle of the job,I know some commercial laser don't have this feature.

[Programer Li]

2012 dsp 与G251正确的接法应该为共阴接法:
任选一个主板的GND -> signal groud
PUL -> Step
DIR -> Direction

[Greolt]

Thank you very much Programmer Li.

Google translate came up with this,

2012 dsp And G251 correct connection for the common cathode connection should be:
Choose a motherboard GND -> signal ground
PUL -> Step
DIR -> Direction

This is what I expected. Thanks for the info

Greolt

[Greolt]

I have received my LO DSP. It was delivered very quickly. Direct from China. Thank you Marco

You can imagine my surprise to discover that all the info I have been able to track down re driver connection has shown to be incorrect.

A couple of posts above the engineer even confirmed that "step/direction/ground" driver connection was available and OK.

See attached pics from available documentation. All show six connectors per motor. This is all from the documentation that is presently on the LO site.

Now I discover the AWC608 DSP has only three connections per motor. "DIR/PUL/DC5V"

I really feel I did my due diligence as to the DSP suiting my needs in this respect.

(TRANSLATED via Google)
2012 dsp And G251 correct connection for the common cathode connection should be:
Choose a motherboard GND -> signal ground
PUL -> Step
DIR -> Direction

Now don't get me wrong, I am not throwing my hands in the air and giving up. I have decided the LO DSP is the controller I am going to use.

However I need to come up with a way around this stuff up.

It may well be that the engineer meant that I could source a ground connection elsewhere on the board, but I don't have direct access to ask that question.

Marco can you ask Programmer Li if this is what he meant in the above quoted post ?

Greolt

[Tech_Marco]

That's an old connection diagram for V2 model!

I posted a connection diagram in many place and here is one you can look at
viewtopic.php?f=55&t=896

I didn't remove the old connection diagram just in case other folks who may need it

Regarding the ground, you can pick any ground on the connector. That's what he meant to


Marco

[Greolt]

Thanks for the reply Marco.

I had not read that new PDF. Thanks.

I will proceed with the installation and pick up a ground connection from elsewhere on the board.

Let you know how it goes.

Greolt

[ashkalb]

Did you get this to work?

[Greolt]

Did you get this to work?

Sorry. I should have concluded this thread.

Yes working fine. Picked up a 0v (or ground) elsewhere on the board.

Greolt