Laser Cutter/Maintenance

Running cost

• The tube is £250 for 300 hours
• The PSU is £300 for 750 hours
• The lens+mirrors are £50 for 200 hours
• The expected useful lifetime of the machine is around about 2750 hours, with a replacement cost estimated at £7000.
• The power is (say) 1.2kW at £.2/kWh.

250/300 + 300/750 + 50/200 + 7000/2750 + 1.2*.2 = £4.30/hour

Laser cutter money held in the the foundation bank account:

Date	Notse	Amount
2011-04-02	Usage Fees	+ £210
2011-05-28	Usage Fees	+ £248.44
2011-06-08	Optics set	- £188.25
2011-06-20	Cash from tin	+ £30.00
2011-06-20	Water + tubing change	- £30.00
2011-06-28	Usage Fees	+ £25.04
2011-07-12	Usage Fees	+ £88.46
2011-07-27	Usage Fees	+ £70.58
2011-12-17	Usage Fees	+ £135.66
2012-01-21	Usage Fees	+ £48.72
2012-03-24	Usage Fees	+ £142.12
2012-05-21	Usage Fees (Cleaner)	+ £5
2012-06-02		£69.75
2012-12-01		£110
2012-12-01		£61.53
2012-12-02		£31.14
2012-12-19		£59
2013-1-2		£34.50
2013-1-15		£38.38
2013-2-1		£119.37
2013-2-12		£25
2013-2-20		£88.80
2013-9-18		£700

Cleaning Schedule

• Optics cleaning every 25 hours (or as required)
• Extraction fan cleaning every 25 hours
• Electronics section dust removal every 25 hours
• Laserbed cleaning every 50 hours (soaked in a peroxide based cleaning solution)