Installed ammeter and damaged a circuit board on my chinese laser

[StuartW Wilson]

Hi there I installed IMAG1371.jpg on my so called 50watt laser as I over cooked the tube, so while waiting for the new one I followed instructions from lensdigital.com. I thought that I removed all the metal shaving from IMAG1369.jpg unfortunately I didnt look close enough and left filing inside which caused IMAG1367.jpg IMAG1368.jpg there was sparked coming from the unit and it shut the house power down. So not sure what else this unit would have damaged. Would it be possible to fix this or should I purchase another one and if so what is the name of the unit? I am defiantly a newbie so all help appreciated. regards Stuart

[Dave Sheldrake]

Not worth messing with Stu, dump the small low voltage PSU and get a new one.

Is the machine an SH350? if so I think a couple of the guys here have them and I certainly know others that do. The power supply type is marked on a sticker usually.

[StuartW Wilson]

On the side of the unit it has CL-B-150-LB (AC Input 220V 50HZ - DC Output V1:24V 6A, V2:5V 2A) Can I go Higher with the DC amp output,would D-150B be suitable?IMAG1374.jpgIMAG1376.jpg.Regards Stuart

Model		D-150A		D-150B			D-150C
Output	DC Voltage	5V	12V	5V		24V	12V		24V
Rated current	12A	7.5A	10A		4A	8A		2
Current Range	0.5~12A	0.1~7.5A	0.5~10A		0.1~4A	0.5~8A		0.1~2A
Rated Power	150W		146W			144W
RIPPLE & NOISE (max.) Note.2	60mVp-p	120mVp-p	60mVp-p		150mVp-p	60mVp-p		150mVp-p
VOLTAGE ADJ. RANGE	CH1:4.75~5.5V		CH1:4.75~5.5V			CH1:4.75~5.5V
VOLTAGE TOLERANCE Note.3	±2%	±6%	±2%		±5%	±2%		±5%
Line regulation	±0.5%	±1.0%	±0.5%		±1.0%	±0.5%		±1.0%
Load regulation	±0.5%	±5.0%	±0.5%		±6.0%	±0.5%		±6.0%
Setup, Rise, Hold Time	200ms, 100ms, 30ms at full load
Input	Voltage Range	85-132VAC/170-264VAC 47-63Hz; Selected by switch 240-370VDC
Frequency range	47-63Hz
AC Current	2.5A/115V 1.25A/230V
Efficiency	78%			80%			80%
Inrush Current	Cold start 15A/115VAC 30A/230VAC
Leakage Current	Less than 3.5mA/240VAC
Protection	Over Load	105 ~ 150% rated output power
Protection type : Fold back current limiting, recovers automatically after fault condition is removed.
Environment	Working Temp., Humidity	-10 °C- +60 °C; 20%-90% RH
Storage Temp., Humidity	-20 °C- +85 °C;10%-95 RH
Vibration	10-500Hz,2G 10min./1cycle, period for 60 min, each along X, Y, Z axes
Safety	Withstand Voltage	I/P-O/P:3KVAC I/P-FG:1.5KVAC O/P-FG:0.5KVAC
Isolation Resistance	I/P-O/P, I/P-FG, O/P-FG: 100M Ohms/500VDC
Standard	Safety Standard	Design refer to UL1012
EMC Standard	Design refer to FCC Part15 J Conduction Class B
Others	Weight	0.85Kg
Dimensions	199*110*50mm(L*W*H)
NOTE	1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25 of ambient temperature.2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.3. Tolerance : includes set up tolerance, line regulation and load regulation.

[Jerome Stanek]

did you check the fuse

[Ray Beaty]

Where is the fuse located? I have a 60w gweike and lost power to the x,y and z axis. The mother board has lights flashing and the main psu has no lights on but the fan on it works. Does the main psu provide power to the low voltage psu or just to the laser tube? Thanks and I hope this makes sense!

[Dave Sheldrake]

The big PSU supplies the tube, the smaller one in the picture supplies the driver cards,motors and mainboard usually (not always from one psu though, some machines have up to 4)

[Ray Beaty]

The big PSU supplies the tube, the smaller one in the picture supplies the driver cards,motors and mainboard usually (not always from one psu though, some machines have up to 4)

Thanks Dave

[Bert Kemp]

I just installed an amp meter also, and I didn't want to cut holes in my machine so I Laser Tube.jpg and ran the wires out the vent cover you see behind the tube and up toAmp Meter.jpgthe meter which I built a box for and used Velcro to hole it in place on top of my laser. Its a much shorter run and the meter is much easier to see when the machine is running.

[Jerome Stanek]

In the picture of the supply there is a fuse right by the terminal strip

[Bert Kemp]

fuse.jpgI think here.

In the picture of the supply there is a fuse right by the terminal strip

[Ray Beaty]

Thanks Jerome

[Kev Williams]

Good luck gentlemen! --

My Triumph is set up to run 2 lasers at once, so I was lucky enough to get 2 mA meters with it

[Ray Beaty]

Thanks Bert

[StuartW Wilson]

I am trying to understand the dc output is it set to DC Output V1:24V 6A, V2:5V 2A) or is this the max amp output for the unit? If so can I use a unit that can deliver higher amp which wil only be used to what is required by the machine? regards Stuart

[Bill George]

I am trying to understand the dc output is it set to DC Output V1:24V 6A, V2:5V 2A) or is this the max amp output for the unit? If so can I use a unit that can deliver higher amp which wil only be used to what is required by the machine? regards Stuart

To keep things simple I would put in the exact same one, because the other one did not fail because of use or being overloaded.