Attendees:
- BlakeS, NickB, KamilS, FletcherB, Lemming
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Date |
Hour count |
20171210 |
1.6 |
20171217 |
11.5 |
20171230 |
31.2 |
20180210 |
72.05 |
20180305 |
95.8 |
20180604 |
181.65 |
20180702 |
234.8 |
20180827 |
295.5 |
20180924 |
326 |
20181022 |
375.5 |
20181129 |
426.9 |
20181209 |
475 |
20181217 |
488.9 |
- G.Weike LG500/Little Red
- No Class 2 red aiming laser
- Keys dying on control pad - down arrow?
- Test cut nice and fast, 3mm MDF at over 15 mm/sec
- 22mA, configured Max-Power still at 67
- Whiteboard says 9mm/sec? possibly less reliable cuts over the whole honeycomb workspace
- 2018-12-17 Fletcher tests at 16mm/sec
- KH-7050/Kellogg
- Has PC next to it - installed?
- Software seems to work?
- Kamil: Laser tube ready to install in the next week?
- IainG's 25W Shiny Rabbit https://fslaser.com/ table top laser cutter visiting for Canning STEAM, Science show @20181208/Little blue
- Currently borrowing Kellogg's compressor
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- LC1290/Big Red fault finding
- Laser is cutting very poorly, but displayed current is still OK
- If the tube is failing; it's our third (second arrived broken) Reci W6, installed 2016-12-28: so it has had about 1000 hours burn time?
- If the HV PSU is failing; it's our second MYJG-150 (150W), USD$410+shipping, installed 2015-01? A suitable spare will probably be cheaper and we're inclined to get one regardless.
- Blake: Diagnostics yesterday 2018-12-16
- Cleaned mirrors, lens
- Checked alignment - OK
- No improvement ~20mm/s for 3mm MDF
- Tried to clean tube end
- Stopped cutting at all - just marking wood
- Still drawing 26mA
- Fault finding today
- We think could hear electrical arcing while laser running - 26mA
- Tried taking end cover off and recording video
- Cannot find actual arcing, possibly OK?
- STILL TO CHECK: Laser is operational, but is the plasma stable at both ends?
- Look for arcing of power supply - find nothing
- Take out power supply: model MYJG-150 (150W)
- Look through insulation for signs of arcing
- Test outside with dummy load. milli-Ammeter in series and 1000:1 HV probe with multi meter
- 102 kiloohm resistor (100W)
- When firing power supply ("Text" = "Test") button: 44mA, 4400V (193.6W)
- When connecting two dummy loads in series: 206 kiloohm: 42mA, 8700V (365.4W)
- The dummy loads do not drive the HV PSU at full power - 29000V (~750W)
- 130W to 145W output for ~20% power efficiency
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- HV PSU models:
- Kellogg: BH-80W
- LG500/Little Red: MYJG-60 (60W)
- LC1290/Big Red: MYJG-150 (150W)
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- LC1290/Big Red spare parts
- 2018-12-13 Blake: ordered laser head: AUD $70 (inc. GST)
- 2018-12-14 Blake: ordered operations panel: USD $45.60 + shipping
- Spare HV PSU? USD$200--$450?
- Beam combiner+lens? USD$30?
- Laser safety goggles