walt's conversion 40WCO2 laser

[waltfl]

HI
I just start my conversion after 8weeks fooling around with moshi laser.
I have orderd DSP, 2 driver,power supply 24V 19A and the Laser power supply.
yesterday I received the laser powersupply the rest should arrive on monday.
what I realised right a way is that the HV and a blue wire ( I dont know what it is for)
but to bring any connectorout the backside is bad at least for me because there is where the cooling fan is located and this should be mounted on the outside wall after making a big whole in the housing because if put inside it would heat up the the whole inside and especial under the laser tube.
I made a hole in the top of the laser power supply and moved the connector (HV) ther now I can mount direckt to the outside wall.
what is this blue wire for?
maybe this could be done with the next production
could I use the setting on the two power supplys to 220V and use the original waterpump or what waterpump you recommend?

I will report more as I go along.
thanks
walt

[twehr]

HI

yesterday I received the laser powersupply the rest should arrive on monday.
what I realised right a way is that the HV and a blue wire ( I dont know what it is for)

Walt,

The HV is the power to the tube itself. The blue wire is the ground return. The HV goes to the sealed end of the tube and the blue goes to the open (output) end of the tube. Without those two wires, you don't have anything driving the laser tube.

[waltfl]

Hi all
here comes the next part.
I opened the HV supply in order to move the HV wire away from the rear to put the fan directly to the outside of the machine. then I discoverd that the wire can not be disconectet from the HV transformer or the coupling. does anybody know how to do this??
the next thing was that the HV transformer has two different size halfs of the core what is not good see picture attached
maybe marco can comment on this also to marco ca you not make the HV wire 4 inches longer then this would be long enough for all K40 laser and you could save the coupling.
I will post picture after installing the HV supply
greetings
walt

[waltfl]

hi all
after changing the HV power supply ( see picture ) I mounted in the laser body. I had to cut out a opening for the fan because my machine did not have one I have seen some who had allready one ( lucky you),
then I mounted the fan on the out side of the poer supply and then in the machine boddy ( see the other picture)
then I cut the HV wire connector away what did give me the right length to direct conect to the laser tupe.
this way I dont have the useless extension. that should probably be changed on futhure power supply.
LIke you see I mounted the supply on the left hand side because I will mount the 24V power supply on the right hand side right on the perforated outside this safes me to cutout another opening.
with this mounting the whole inside will not be heatet with the heat outflow of the air from the 2 fans and the whole inside will be over the airstrom cooled.
I also change the position of the water hoses to a higher part this way the hoses dont run on the bottom of the machine now it runs in the hight for a water resorvouir
greetings
walt

[waltfl]

and here are the next steps.
I did connect the 24V power supply and drilled holes in the outside of the machine for the cooling fan of the 24V power supply.
also I installed the two limit switches and use the existing PCB board took out the original switch parts and soldered the wire from the new switches to it this way I can use the original ribbon.
the DSP and panel worked at the first time perfect.
the next step will be the connection of the motor driver and the limit switches and maybe I am lucky and this works too.
does anybody know how the water flow switch is connected because the DSP has only 1 connection I assume the 2nd wire goes to gnd.
greetings
walt

[waltfl]

Hi all
here now a few new picture from the final setup
but without the conroller card I had to send it to marco for testing.
I have everythings to work with the LCD display, x- and Y axis with limit switch, test the laser.
after I have my controller back then I can connect to my computer and make the rest settings and hopfully start working.
greetings
walt

[waltfl]

Hi all
I just went on with my rebuild of the K40 and after the new DSP card arrieved it worked perfect but the Y -axis had a teribble noice and wobbled a bit, so I took out the whole frame the x time and inspected the whole y-drive and the belt and pullys and the idler and I did see that on one side the idler did wouble.
I took it out and there it was the tiny axel only had one bearing not two now this mearings are realy tiny 8mmOD and 3mm ID. here in florida we dont have much industrie close to nothing and the same with stores.
I looked around in my shop and found a old computer fan with ball bearing who did have exactly the same bearings in it. I ahd to destroy the fan to get the bearing but it worked and the machine runs like a charme now.
now I am up to re-focusing the laser a nother night mare.
I just hope it helps somebody.
greetings
walt

[Tech_Marco]

Can you shoot us a picture. I still have contact with the manufacturer sales and the manager. I may be able to get some if there are a lot of issue like that


Marco

[waltfl]

I am sorry but I had to put it back and did not take a picture.
it is this plastic idler in the back of the machine.
greetings
walt

Can you shoot us a picture. I still have contact with the manufacturer sales and the manager. I may be able to get some if there are a lot of issue like that


Marco

[Gadroc]

Walt,

I'd like to compare your setup to mine. Could you post some information about your machine / conversion.

1) Are you using the steppers that came with the machine? If so what are the part numbers of them?
2) How many micro steps do you have setup on your stepper drivers? (and which stepper drivers)
3) What settings are you using in your manufacturer parameters for LaserCad?
4) What settings are you using in your user settings for LaserCad?

[waltfl]

Hi gadroc
no I bought new stepperdriver 2M5042 from lightobject and I have set them to 800 micro steps
attached are the screen shot from the settings.
I also bought the PS from lightobject and the 24v15A PS. pretty all new except the drive and the laser tube.
I also use a 120v waterpump ( little giant) with a peltier cooler, and the dustremover system from harborfreight
what is yours?
greetings
walt

Walt,

I'd like to compare your setup to mine. Could you post some information about your machine / conversion.

1) Are you using the steppers that came with the machine? If so what are the part numbers of them?
2) How many micro steps do you have setup on your stepper drivers? (and which stepper drivers)
3) What settings are you using in your manufacturer parameters for LaserCad?
4) What settings are you using in your user settings for LaserCad?

[Gadroc]

I have the 2M415 stepper drivers (slightly lower max amps than yours) and have them set to 8 as well. Based on your settings your machine is running at roughly 2000 steps per inch like mine.

I probably have the same harbor freight dust extractor (green one). You can see all my settings in my post here.

[waltfl]

hi
now I got a probleme with all the settings because I ahve setup everythings with the display but if I start now with the lasercut programm it does some strange things the home position is now lower right and the box size is totaly different then what I have set it I try to change the home position in the programm to lower left but it did not changewhat is your setting? is this ok ?
thanks greetings
walt

I have the 2M415 stepper drivers (slightly lower max amps than yours) and have them set to 8 as well. Based on your settings your machine is running at roughly 2000 steps per inch like mine.

I probably have the same harbor freight dust extractor (green one). You can see all my settings in my post here.

[Gadroc]

After you change the home position you have to download the job again.

[waltfl]

hi
I did not change the home position in the programm but the box size is somehow to big and the machine does not recognoze the size settings

After you change the home position you have to download the job again.