BE CAREFUL

If you have made Upgrades and/or Modifications to your machine, let us know about them here.
Willy Ivy
Posts: 261
Joined: Tue Aug 09, 2016 10:07 am
Location: Pattison, Texas
Country: USA
Nickname: Willy
Laser Machine Make or Type: KH 7050
Laser Power: 60W
Laser Bed Size: 12" x 20"
Home Position: TL
RDWorks Version: v8.01.18
Accessories: Hot dog rotary
Windows Version: W7 Pro
Contact:

BE CAREFUL

Post by Willy Ivy » Tue Oct 04, 2016 9:59 pm

I was so proud of my cutting bed modification. I used it for several months and it worked great. Then, the only time I have ever stepped away from my laser while it was at work (about 15 minutes) I almost lost my entire shop. My bed was constructed with 3/4" plywood, predrilled on press for 2 1/4" long nails, with 1/4" acrylic backing support under plywood to keep nails from backing out. It was heavy, but it was solid. I was cutting 1/4" acrylic for extension box for my new 60w tube. The plywood bed caught on fire under the acrylic soon after the cutting began. I cut the exact 2 pieces the previous night and all looked good. Please, be careful what kind of material you make your cutting bed out of, or never walk away from it if it is flammable. I am not very proud of my decision and can now see my mistake. I only share my stupidity with you all in hopes that no one makes the same mistake. You cannot see in these photos, but the ceiling is charred and the light fixtures had all the wiring inside melted together. This was 10 days ago and after about 100 hours of labor, I should have it all rebuilt and ready when my replacement laser gets here in two days.
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50w Chinese laser KH-7050, 500x300, TL, 2" lens, hot dog rotary
Modifications: 60w tube & power supply, honeycomb bed, amp meter, easy access mirrors
RDWorks V8.01.18, CorelDraw X6, W7 Pro
Pattison, Texas
http://dadburnitlaser.com
Willy

Doug Fisher
Posts: 517
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: BE CAREFUL

Post by Doug Fisher » Tue Oct 04, 2016 10:38 pm

Thanks for the reminder. So sorry to hear about your fire but glad to hear you seem to have been able to recover!
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

User avatar
Keith Sherwin
Site Admin
Posts: 1593
Joined: Fri Jun 24, 2016 3:44 pm
Location: Heart of Canada
Country: Canada
Nickname: Keith
Laser Machine Make or Type: POS China
Laser Power: 80
Laser Bed Size: 400 x 600
Home Position: TL
RDWorks Version: V8.01.23
Accessories: Hot dog roller, doHICkey Power Meter, Multi-Lens, High power exhaust, Interior filter soon.
Windows Version: W7 Pro

Re: BE CAREFUL

Post by Keith Sherwin » Wed Oct 05, 2016 6:36 am

A stark reminder of something any one of us could have done. Glad to see it was not as bad as it could have been. We all know the dangers (I HOPE!) but sometimes we forget. Guess that is why Russ uses the Acrylic plates for his standoffs (and they get marked a lot) as it would take a lot to set them on fire.
Thanks for the reminder Willy. We should all take notice of your misfortune.
Good Luck in the future.
Keith
:idea: Started this forum.
Lead in creation of the RDWorksLab English Manual.
Cheers, :D
Keith

User avatar
Gene Uselman
Posts: 1314
Joined: Thu Jul 07, 2016 3:18 pm
Location: Suburban Minneapolis, Minnesota, US
Country: USA
Nickname: Gene
Laser Machine Make or Type: QC1390
Laser Power: 130W EFR
Laser Bed Size: 36x49
Home Position: TR
RDWorks Version: V8.01.19 LO
Accessories: I have a combining lens, pin tables [homebuilt], honeycomb table [LightObject], wireless remote on the way [crossed fingers]
Windows Version: Win 7 Pro

Re: BE CAREFUL

Post by Gene Uselman » Wed Oct 05, 2016 7:21 am

And actually acrylic burns pretty good too- just harder to light than wood. Gene

Abraham Saenz
Posts: 43
Joined: Wed Jul 13, 2016 3:48 pm
Location: Panama
Contact:

Re: BE CAREFUL

Post by Abraham Saenz » Wed Oct 05, 2016 9:02 am

I'm sorry for what happened to you mate and thankful for the warning. Some times one forgets that is working with flammable materials. Everything seems perfect while the system is working fine, but something as simple as your air assist stopping can cause a disaster.
Acctek AKJ6040+Clearpath Servos+90W EFR laser tube, 1.5 inch lens, polyurethane belts, Boeshield T-9 Lub :)

Willy Ivy
Posts: 261
Joined: Tue Aug 09, 2016 10:07 am
Location: Pattison, Texas
Country: USA
Nickname: Willy
Laser Machine Make or Type: KH 7050
Laser Power: 60W
Laser Bed Size: 12" x 20"
Home Position: TL
RDWorks Version: v8.01.18
Accessories: Hot dog rotary
Windows Version: W7 Pro
Contact:

Re: BE CAREFUL

Post by Willy Ivy » Thu Oct 06, 2016 12:09 pm

Thanks guys. Been 12 days without a laser. My shipping department at work just called and said my laser was in. Headed to shipping and then home now about 4 hours early.
50w Chinese laser KH-7050, 500x300, TL, 2" lens, hot dog rotary
Modifications: 60w tube & power supply, honeycomb bed, amp meter, easy access mirrors
RDWorks V8.01.18, CorelDraw X6, W7 Pro
Pattison, Texas
http://dadburnitlaser.com
Willy

steve jones
Posts: 3
Joined: Thu Dec 08, 2016 5:25 pm
Location: New Zealand

Re: BE CAREFUL

Post by steve jones » Sat Dec 17, 2016 5:26 pm

Wow. 15 minutes away from the laser is not long.

Anyone have thoughts on the best type of fire-extinguisher to have next to the machine? Dry-powder, CO2 etc.....
V8.01.19 RDWorks on Win 7 Pro
TechSoft DesignTools software
80W Reci tube in a 600x900 China laser with Ruida 6442 controller, top right
steve

Doug Fisher
Posts: 517
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: BE CAREFUL

Post by Doug Fisher » Sat Dec 17, 2016 7:32 pm

Dry power makes for a real mess to clean up. Fluid and high voltage power supplies are not a good mix. Halon was great because it didn't create a mess but it is illegal to produce it now. There was a thread somewhere about a replacement extinguisher for Halon. Sorry, I can't remember the name but I bet some Googling will reveal it.
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

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fred ungewitter
Posts: 356
Joined: Tue Aug 16, 2016 2:55 pm
Location: East Central FL, USA
Country: USA
Nickname: fred
Laser Machine Make or Type: Redsail Clone
Laser Power: 60W
Laser Bed Size: 500 x 700
Home Position: TR
RDWorks Version: 8.01.18
Accessories: Chuck style rotary, 30 ma meter, home-spun office water cooler mod, muffin fan anti-condensate blower
Windows Version: Windows 7

Re: BE CAREFUL

Post by fred ungewitter » Sat Dec 17, 2016 7:59 pm

I have a huge CO2 extinguisher in the garage and probably should move it or get something nearer the laser cutter. My quick google search finds "halotron" as a substitute for halon, listed specifically as a no-residue product. Amazon is among the vendors.
fred

Redsail clone 60w 700 x 500 REAL 60w Puri tube
home upper right, chuck type rotary 15000 pulse setting
RDW 8.01.18
Win7

Emblaser A3 4w diode laser
BCN3D Sigma Dual Extruder 3d printer
LMS Mini-mill
Cube 3rd gen 3d printer, universal filament mod
Under construction: OX CNC 1000x750 router

Nathan Hunsworth
Posts: 42
Joined: Sun Dec 11, 2016 12:55 pm
Location: London, UK

Re: BE CAREFUL

Post by Nathan Hunsworth » Wed Dec 28, 2016 4:00 pm

Sorry to hear the news, extinguisher wise I would look at FM-200 its not cheap but we replaced a number Halon systems
X700 Clone (eBay) 60W, 700mm x 500mm, T.R.
RDWorks V8.01.19 on Windows 10.
--Nathan

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