WK Laser LG900 Problems

[Buschy]

Hi All,

Have been playing around with my LG900 and everything is going well except
after running a job it seems to lose the ability to recognise the home limit switches.
If i re-install the MPC03 driver and restart the PC and Laser then i can hit either Datum (in LC5.1) or Reset on the machines front panel and it will drive back to the top RH corner and stop.
After running a job, doing either of the above steps sees the head driving back to the top RH corner but continuing to try and drive right.

I'm not completely forum lazy and have trawled back through some previous threads but havent found anything like i've described above.

If anyone has any ideas i'd be happy to read them.

Cheers,
Buschy

[smoe]

Most likely the machine is losing steps when executing the job.
I think when the machine runs back to the home position the software doesnt look for the home switches. it just moves back home to the 0,0 position (or where it believes that it should be. Try to run a simple job with slow cutting speed and see how that works.

[Buschy]

Cheers Smoe,

I had run the machine at low speeds (5) as well as higher and the problem still persists.
What you say about losing steps, is there a way to do a "soft reset" that you know of instead of re-installing the driver?

Cheers,
Buschy

[smoe]

Hi Buschy,

ooh sorry, I was wrong with what I wrote before.
We had our machine running under a different controller software for the last 6 months and we had the "losing steps issue" there, NOT in Lasercut...

I just changed everything back to Lasercut 5.1 last week after the machine´s mainboard was repaired in China . WKLaser sent me a new Lasercut 5.1 via Email because our CD was bad also :-\
Our setup runs fine now, just occasional quirky USB connection....

Yes we have USB Model but same software as you have...

Well, by all means you should check the end switches with a multimeter.
But it sounds more like a problem in the software, with the homing working fine in the before and failing afterwards. Sorry to say I´m clueless for now.

Regards

[TheWorkshopGuy]

Hi Bushy,
I have JUST purchased the LG900 system and will recieve it this coming Friday.
I can't wait. I'm going to send you my Email in a PM. Let's keep in touch and exchange ideas etc..
I ordered these additional items with mine:
1) Chiller(CW5000)(Optional component)
2) Extra Laser Tube
3) Extra Mirrors and Focus
4) Red Dot Pointer
5) Auto-Focus
6) Motorized Up-Down

Sharing info could be helpful to us both I'm sure.
Thanks
David

[SkipW]

Originally Posted by Buschy Hi All, Have been playing around with my LG900 and everything is going well except after running a job it seems to lose the ability to recognise the home limit switches. If i re-install the MPC03 driver and restart the PC and Laser then i can hit either Datum (in LC5.1) or Reset on the machines front panel and it will drive back to the top RH corner and stop. After running a job, doing either of the above steps sees the head driving back to the top RH corner but continuing to try and drive right. I'm not completely forum lazy and have trawled back through some previous threads but havent found anything like i've described above. If anyone has any ideas i'd be happy to read them. Cheers, Buschy

Buschy,

I don't know if this will be of any use to you or not but this is how I have mine set up. In LaserCut, under file, options, worktable, I unchecked my Auto Datum box so the laser heads doesn't go back home. And when I import a file into LC, it places it automatically in the center of the table workspace on the screen and places a blue X at the center of the imported file. (Maybe you have to click edit, center to table, I forget) So wherever you move the laser head to start from, that will be the center of your file.

The laser will start in the center of the file and end in the center according to where you move/jog the laser head. You can start wherever you want to, and when done the laser will go back to your starting point. I just use the Test button on the laser control after I've sent the file to it, to line up my material.

One note though, there is a bug in LC 5.0 and you have to lower the slow move speed to 8 in the software option or you won't be able to send files to the laser, they won't go. I'm hoping they corrected that in LC 5.1, but if not it's an easy fix.

This method has worked great for me and might solve your problem until you figure out what needs changed to fix it. You might also want to check in the worktable options that the correct size is shown for your table.

And also make sure you have downloaded the config file to your laser.

Sorry, I don't know if this is a new machine for you or if you have had it for a time and it just started doing this.

HTH,
Skip

[cicigweike]

There is a "immediate" button on the laser cut software, you can choose "immediate"
or not "immediate" output.
Is it you had choose the immediate by mistake?

If the machine still have problem, please send the machine video to the sales who sell you this machine, she will help you.


Cici

[neoman1]

Originally Posted by TheWorkshopGuy Hi Bushy, I have JUST purchased the LG900 system and will recieve it this coming Friday. I can't wait. I'm going to send you my Email in a PM. Let's keep in touch and exchange ideas etc.. I ordered these additional items with mine: 1) Chiller(CW5000)(Optional component) 2) Extra Laser Tube 3) Extra Mirrors and Focus 4) Red Dot Pointer 5) Auto-Focus 6) Motorized Up-Down Sharing info could be helpful to us both I'm sure. Thanks David

Hi,

Yesterday I assembled my new LG900 laser. I have bought many extras like the CW5000 chiller, the filtration unit, the red-dot & auto-focus.

I managed to make everything work but I did not managed to use the auto-focus. The only thing I can see is the red dot. How does the auto-focus works? Is the Z adjusted automatically every time you place a new material? Do you have any photo or other instructions about using this extra? The user manual did not say anything about the auto focus.


Many thanks!

[SkipW]

I think the autofocus works by hitting the "Datum" button. Just make sure you have the laser head located somewhere where the table or workpiece will hit the autofocus plunger on the head. That is what stops the table from coming up too far.

In other words, if the table or work item doesn't hit the plunger switch on the laser head, the table will continue to raise.

Hope that helps.
Skip

[neoman1]

Originally Posted by SkipW I think the autofocus works by hitting the "Datum" button. Just make sure you have the laser head located somewhere where the table or workpiece will hit the autofocus plunger on the head. That is what stops the table from coming up too far. In other words, if the table or work item doesn't hit the plunger switch on the laser head, the table will continue to raise. Hope that helps. Skip

I wrote to Cici from Gweike and she send me the autofocus user manual.

The manual is for an older model but I think I know what to do.

I will come back with the test results

[neoman1]

Hi there,

I have adjusted my new laser 80w LG900N machine and I am very very happy with the results.

The machine is working very nice and with a very high precision!! The overall construction is more than good and the after sales communication is fast and satisfying!

I will post a few images from my work as soon as I have the time to do it.

Reading in cnczone forum helped me very much to answer all the questions that I had about laser cutting!

[neoman1]

Hi again,

I have been working for more than a month with my LG900N lasercut machine.
I have noticed yesterday that the cutting dimensions are a litle bit different than the dimensions given in Lasercut software. I have a vector with 500mm length (wood) and the actual cut is 495mm. I noticed that the mistake factor differs in different dimension cuts.

Anybody has an idea what this might be?

Thanks