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--- laserinfo:maintenance [2009/11/06 21:44]
ladyada
+++ laserinfo:maintenance [2009/11/06 22:06]
ladyada
@@ Line 33: / Line 33: @@
 We find that if we keep the machine cleaned on the inside the only other maintenance we need to do is on the filter. The filter we have (the Electrocorp RSU-CCHR12 now supported by AllerAir) has multiple stages and each one has some maintenance needs.
-Once a week (sometimes more, depending on what we're cutting/engraving) we have to change the inner 'pad' pre-filter and clean out the foam dust-collector. Here are some hints that will indicate that you need to replace the filter
+Once a week (sometimes more or less, depending on how often its used and what we're cutting/engraving) we have to change the inner 'pad' pre-filter and clean out the foam dust-collector. Here are some hints that will indicate that you need to replace the filter
   - Smoke is collecting in the laser bay, not being sucked away
@@ Line 65: / Line 65: @@
 {{:laserinfo:new-filter.jpg|}}
+===== 6-12 months =====
+The pre-filter and HEPA do their best to get rid of particle matter. However, there is also odors that come from cutting, especially plastics. For this reason, the Electrocorp also has 20 lbs of carbon granules. These absorb the nasty smell that is made from plastic cutting. Eventually, however, the charcoal gets 'full' and no longer absorbs fumes.
+Here are some hints that will indicate that you need to replace the charcoal
+  - The odor of burning plastic/wood is very strong
+  - Smoke is being sucked away just fine
+  - The filter is clean and the problem doesn't go away
+  - The charcoal smells of fumes when the machine is off
+You can buy charcoal granules from the company and replace the machine. First pour out and throw out the old charcoal. Then pour in cup-fulls of fresh charcoal while tamping down with a rubber mallet or a wooden dowel to make sure you have packed charcoal. While the machine manual implies there is '20 lbs' of charcoal in there, we bought a '30 lb box' and it filled it twice. YMMV
+{{:laserinfo:charcoal.jpg|}}
+{{:laserinfo:char_det.jpg|}}
+===== ~2 years =====
+Finally, the only thing left that can be replaced in the machine is the HEPA filter, which does the fine-size filtration. Because its expensive ($200 or so) you'll want to make sure to change the prefilters as soon as they get dirty or you will end up clogging the HEPA prematurely
+  - Smoke is collecting in the laser bay, not being sucked away
+  - There are small fire/flares in the bay
+  - There is more odor emanating from the machine
+  - The filter is clean/replaced
+{{:laserinfo:hepa.jpg|}}

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