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 Post subject: Re: My Y-axis rail modification
PostPosted: Mon Apr 03, 2017 11:30 pm 
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Joined: Thu Oct 30, 2014 11:43 am
Posts: 750
Location: Finleyville, PA
Country: USA
Laser Type: 5th Gen 45W hobby
Im familiar with a UV printer. Ive got a $30K one sitting behind me :D Just watch your inks... My inks can print on garments, but are not clothing safe (not sure how that works, but it was told to me when I got it). White ink is a PITA... I lose 3ML a day in cycling, and about .25ml a print in flushing the lines, to keep it mixed and solid printing. Not bad when you have 220ml carts, but it adds up.

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Azzy's Design Works - teamadw.com
Equipment: 5th gen FSL hobby, 45w, w rotary and frustration, KNK MaxxAir 24" plotting cutter, Roland LEF-20 Eco-UV Printer, Thunder Laser Nova 35 100w


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 Post subject: Re: My Y-axis rail modification
PostPosted: Mon Apr 17, 2017 12:15 pm 
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Joined: Thu Feb 02, 2017 3:06 am
Posts: 104
Location: Oregon
Country: USA
Laser Type: 5th gen Hobby
So my cutting in the lower right of the bed wasn't going as well as it was in the rest of the work area. Then I stumbled across this alignment video.

https://www.youtube.com/watch?v=e1c3keOKL6Y

He finally clarified something that I had realized, but wasn't sure how to fix: I had read that you want the beam to hit the center of mirror 3. But, I realized that there was only angle each mirror could be at to have the beam hit the near and far positions at the same place on the mirror. If you adjusted the angle of the mirror to hit the center of the destination mirror, it likely wouldn't be aligned when you check near/far.

The only way to get the beam to hit the center of mirror 3, is by physically moving either the tube, or loosening the mounts on mirror 2 and/or mirror 3, and moving them.

After doing this Y-axis mod, it lowered the entire gantry a tiny bit. That meant I had to slot the 3 holes in the red flange that mirror 3 mounts to so I could raise it up and center the beam again.

Now I'm cutting well over the entire work surface


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 Post subject: Re: My Y-axis rail modification
PostPosted: Mon Apr 17, 2017 12:58 pm 
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Joined: Thu Jun 13, 2013 6:11 pm
Posts: 1053
Country: USA
Laser Type: 4th and 5th
Good point Hoozie. I have adjustable tube mounts and have had the unfortunate experience of aligning the laser, then realizing one mirror is out- so I have to move the tube, realign, check height, move tube, realign, check height... not a fun process but you sure get great results when you're not clipping mirror mounts :)

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40W Gen 4, 80W Gen 5 with Rotary, RigidBot 3D printer, LittleRP 3D printer, screwdrivers.

Please remember this is an unofficial forum and is unaffiliated with Full Spectrum. All moderators and admins are volunteers!


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 Post subject: Re: My Y-axis rail modification
PostPosted: Mon Apr 17, 2017 2:02 pm 
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Joined: Thu Feb 02, 2017 3:06 am
Posts: 104
Location: Oregon
Country: USA
Laser Type: 5th gen Hobby
Yea, I was really close to the top of mirror 3, which made it impossible to get it in the center of the lens. Once I moved mirror 3 up a few millimeters, I was right in the middle.

The other critical one to align is mirror 3 to the lens, by doing test fires with the lens at the top and bottom of its movement.

And it really is worth the extra time.


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 Post subject: Re: My Y-axis rail modification
PostPosted: Tue Apr 25, 2017 10:29 pm 
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Joined: Tue Apr 25, 2017 8:29 am
Posts: 9
Location: Fredericksburg, VA
Country: USA
Laser Type: 5th Gen FSL
Question for those of you who have used these rails. Would this system be a suitable replacement for the linear slide X-axis described in the Linear bearing mod for x axis thread ?

I'm getting to the end of my rope dealing with the wavy line syndrome and think I may be ready to try to tackle a complete rail system overhaul. I'd like to stick to one type of system (the one described in this thread) if this group's experience would support that.

Looking forward to your advice.


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 Post subject: Re: My Y-axis rail modification
PostPosted: Wed Apr 26, 2017 3:14 pm 
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Joined: Thu Feb 02, 2017 3:06 am
Posts: 104
Location: Oregon
Country: USA
Laser Type: 5th gen Hobby
I would think it should work well enough using the v-slot rail for the X-axis. You would need to do the math and figure out how much to offset the upper holes so they fit over the rail, and leave room for the eccentrics to do their thing. (although I think the file I attached earlier would give a good start)

If I were to do the X axis again, I would look at using the Hiwin rail system, since the rail I used has some twist to it, requiring some other hacks to make it straight enough.

You would definitely need to slot the three holes that mirror 3 mounts to so you can get the beam centered in the mirror though.


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 Post subject: Re: My Y-axis rail modification
PostPosted: Wed Apr 26, 2017 4:52 pm 
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Joined: Tue Apr 25, 2017 8:29 am
Posts: 9
Location: Fredericksburg, VA
Country: USA
Laser Type: 5th Gen FSL
Thanks hoozie. I will take a look at the Hiwin system. Remounting the mirror was going to have to happen anyway because I'm trying to work out a complete rebuild of the flying head on a new mounting plate to fix the focus lens slop and avoid some of the other issues (mounting hole vs belt clamp or having to drill a hole on the edge of an existing one). I've got some more plotting and scheming to do.


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