Downgrade laser tube

If you have made Upgrades and/or Modifications to your machine, let us know about them here.
Alexis Tzoulis
Posts: 95
Joined: Thu Oct 06, 2016 7:03 pm
Location: Greece

Re: Downgrade laser tube

Post by Alexis Tzoulis » Wed Jan 11, 2017 4:16 am

I see that glass tubes have a region of operation when the beam is not properly formed that called
"high frequency impact engraving" and in that region laser operates at high frequency so gives better engraving results.
For some reci models is about 4-5ma ...
How to find that region for my tube ? I have no datasheet.
KH-7050 60w (50w real) (700mmx500mm) redsail clone TR
Ruida 6442G controller - MYJG-60W power supply - 1000mm/50mm co2 tube
RDWorks V8.01.19 - corel draw x8 - windows 10
Alexis

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Gene Uselman
Posts: 1300
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: Downgrade laser tube

Post by Gene Uselman » Wed Jan 11, 2017 7:19 am

Russ said it was trial and error- different for each tube/machine. I 'think' he was using the sound to identify it- I have poor hearing so I cannot say. Gene

Alexis Tzoulis
Posts: 95
Joined: Thu Oct 06, 2016 7:03 pm
Location: Greece

Re: Downgrade laser tube

Post by Alexis Tzoulis » Wed Jan 11, 2017 8:05 am

In which video Russ explain that with sound ?
Today installed an ammeter and tried 15% (5ma) 250mm/s but the results are bad only 3 shades of grey in granite.
KH-7050 60w (50w real) (700mmx500mm) redsail clone TR
Ruida 6442G controller - MYJG-60W power supply - 1000mm/50mm co2 tube
RDWorks V8.01.19 - corel draw x8 - windows 10
Alexis

Doug Fisher
Posts: 508
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: Downgrade laser tube

Post by Doug Fisher » Wed Jan 11, 2017 8:08 am

Download the index of Russ' videos which is available on this forum in the section about Russ' videos. I bet you will be able to find the episode you are seeking.
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

Michael Dunning
Posts: 42
Joined: Sun Nov 27, 2016 1:02 am
Location: Alabama USA

Re: Downgrade laser tube

Post by Michael Dunning » Wed Jan 11, 2017 2:41 pm

As I recall it is a combination of the sound and the fact that as you watch the laser tube the beam will "dance" around the end of the tube, as opposed to being a solid, well-defined laser beam. I still need to try it out on my machine though.
EBay Chinese 60W (45W actual) laser cutter, 700x500mm, (TR)
RDWorks V8.01.18 and V8.00.27
Michael

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Gene Uselman
Posts: 1300
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: Downgrade laser tube

Post by Gene Uselman » Wed Jan 11, 2017 2:50 pm

Alexis- watch # 56,57,58. I believe those are the ones that talk about it. Gene

Alexis Tzoulis
Posts: 95
Joined: Thu Oct 06, 2016 7:03 pm
Location: Greece

Re: Downgrade laser tube

Post by Alexis Tzoulis » Thu Jan 12, 2017 5:35 pm

It is video #63
I know this machine with ruida 320 controller has 40w tube https://www.youtube.com/watch?v=RnYldY6yUKw
but which 40 tube & power supply produces the quality result shown in granite portraits?
KH-7050 60w (50w real) (700mmx500mm) redsail clone TR
Ruida 6442G controller - MYJG-60W power supply - 1000mm/50mm co2 tube
RDWorks V8.01.19 - corel draw x8 - windows 10
Alexis

Alexis Tzoulis
Posts: 95
Joined: Thu Oct 06, 2016 7:03 pm
Location: Greece

Re: Downgrade laser tube

Post by Alexis Tzoulis » Thu Jan 12, 2017 9:29 pm

This power supply (HY-T50 50w) https://www.aliexpress.com/item/Co2-Las ... 84795.html
matches co2 tube length:800mm dia:50mm like this http://www.ebay.de/itm/10-64-m-Wellenla ... 2137074728 ?
KH-7050 60w (50w real) (700mmx500mm) redsail clone TR
Ruida 6442G controller - MYJG-60W power supply - 1000mm/50mm co2 tube
RDWorks V8.01.19 - corel draw x8 - windows 10
Alexis

Alexis Tzoulis
Posts: 95
Joined: Thu Oct 06, 2016 7:03 pm
Location: Greece

Re: Downgrade laser tube

Post by Alexis Tzoulis » Thu Feb 02, 2017 9:03 am

I have installed HY-T50 50w power supply to KH-7050 1000mm (50 real watts) tube
but iam getting the same engraving quality with 60w factory power supply.
With 50w power supply iam getting more linear response with different power levels...
At 50% the ammeter show 10mA, with factory power supply at 30% showed 10mA.
KH-7050 60w (50w real) (700mmx500mm) redsail clone TR
Ruida 6442G controller - MYJG-60W power supply - 1000mm/50mm co2 tube
RDWorks V8.01.19 - corel draw x8 - windows 10
Alexis

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