cg23cpo
Gots Tree Cred
keep collecting more and more
Posts: 30
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Post by cg23cpo on Jun 8, 2020 18:37:05 GMT -5
Well with all the techno-gee-whiz stuff out there, who has thought of 3D printing the housing for the air filter and inserting a block of replaceable air cleaner foam.
Not mfgr. original, but functional and possibly drive the price down and availability up.
This is a job for reverse engineering. All I need is a good filter frame, mine is tattered/shredded and crumbling like lots of others or when I get second upper shroud, I can put it on the measuring device at work.
Pros/cons? Who's in?
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Post by rowdy235 on Jun 8, 2020 22:27:46 GMT -5
I like the idea. My filter is in rough shape as well unfortunately. I’m not particularly a fan of foam filters but they are available for sure.
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Post by Mr_Huns on Nov 13, 2020 18:00:32 GMT -5
I think you can twist my arm. Draw me a rough sketch and tell me more. All I want is a picture of the throttle trigger assembly for my other thread. The filter is about 1.355x2.803x0.606" Can you confirm? Do you think it was larger when it was new and that it shrank? Attachments:
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Post by Mr_Huns on Nov 14, 2020 20:38:23 GMT -5
Do you want it like this? How do you want to keep the foam from dropping out the bottom? Attachments:
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Post by onlyhomelites on Nov 15, 2020 0:14:52 GMT -5
Dense foam shouldn't come apart...that tray should hold it in place quite well!
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Post by Mr_Huns on Nov 15, 2020 1:30:30 GMT -5
I am so glad you think it will work. I published the design on Thingiverse for review: www.thingiverse.com/thing:4653949Unfortunately, I have only ever printed PLA plastic and it gets brittle after a while. I think it biodegrades in about 6 months in the open air? ABS would be the better choice for 3D printing. |
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Post by rowdy235 on Nov 15, 2020 1:57:20 GMT -5
I’ve dabbled with printing both PLA and ABS. PLA can degrade in about 6 months but only if the conditions are right, but if stored right it lasts for years. It is fairly brittle however especially when being exposed to heat. That said, it may work for a “proof of concept” test.
In my opinion ABS would be the material of choice but is harder to work with, usually requires a heated plate on the printer but maybe not for the small piece. Also I’m not an expert by any means so take this with a grain of salt.
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Post by Mr_Huns on Nov 15, 2020 12:37:42 GMT -5
****** Update************ The first design part does not fit! Shocking, right? Now that I have a design, let me tailor the changes to make the fitment better  IMG_20201115_122026 by MR Huns, on Flickr |
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Post by Mr_Huns on Nov 16, 2020 9:06:45 GMT -5
**************************************************************************************************************************************** Update 20201116, Version 0.3 finally fits!! Your comments are greatly encouraged and welcomed. Thanks, Huns  IMG_20201116_085337 by MR Huns, on Flickr  IMG_20201116_085327 by MR Huns, on Flickr |
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Post by bamaboilermaker on Nov 16, 2020 11:08:17 GMT -5
I had the same idea about 2 years ago. Instead of 3D printing, I designed a filter holding fixture and machined out of Delrin. I was looking for a picture but could not find it. Basically same idea, different manufacture process. I will pull my 330 off shelf tonight and take a picture. I have found I like working on (and with) SXLAO saws much better than the 330's.
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Post by lesorubcheek on Nov 16, 2020 15:01:39 GMT -5
Awesome idea! It's for a long time amazed me how dog one expensive the filters are for a 330. That's a great solution. Please continue showing the filter material you choose and the finished product.
Dan
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Post by rowdy235 on Nov 16, 2020 17:12:51 GMT -5
Looking good! Have you sourced the foam yet? I was thinking an air filter for a Briggs & Stratton 3hp (trapezoid shape) could be used to make a few filters, and is cheap / easily available.
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Post by Mr_Huns on Nov 16, 2020 17:46:16 GMT -5
I totally agree; Whatever they got at my local store trimmed to fit with a pair of scissors. I think we should keep it easy as possible...
The law of K.I.S.S.
Delrin would work great too, but then I have to more setup. 3D printering is absolutely awesome, like 'click' and walk away.
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Post by bamaboilermaker on Nov 17, 2020 12:37:39 GMT -5
Here is the air filter box I made a few years ago. Filter media I used was just cut from a lawn mower "pre filter" Attachments:
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Post by bamaboilermaker on Nov 17, 2020 12:40:28 GMT -5
Here is what it looks like in the saw. Pretty simple. Attachments:
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Post by Mr_Huns on Nov 18, 2020 7:14:09 GMT -5
bamaboilermaker: Dude that's awesome too. I guess it can't suck the media into the saw because there is a feature on the top plate with the choke controls? I honestly didn't even look. I am still waiting for a carb kit. I still haven't started the saw. It has a fuel problem on the pump side.
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Post by Mr_Huns on Nov 18, 2020 7:30:09 GMT -5
You know, maybe I am thinking about this problem the wrong way. Does fresh air enter through the bottom, or the top?
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Post by bamaboilermaker on Nov 18, 2020 11:28:48 GMT -5
 The way I see it is that the fresh air enters from the flywheel side of saw thru the slotted opening on the top cover plate. Air is pulled down thru filter media and pulled into carb box thru the opening on the clutch side. My saw was pretty dirty because the foam seal on the bottom of the cover is missing, never went to trouble to replace it. after looking at what I made 2+ years ago, I redesigned it this morning in solidworks with additional cross venting and larger diameter hole matrix at bottom. Also wall stock reduced to 1.5 mm |
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Post by dpress on Nov 18, 2020 17:38:26 GMT -5
Air flows up through the filter, so you will find the bottom of it gets dirty, not the top part you see when you take the cover off. The sponge seal of the filter cover is important to keep the air box area clean, and must seal across the top of any filter fitted, so the shape of anything manufactured is important so that seal is not compromised.
Steve
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Post by Mr_Huns on Nov 18, 2020 20:23:57 GMT -5
I was thinking air flows up through the bottom also. I designed the basket retain the filter on where I thought suction would be. bamaboilermaker. I wish it was easy for me to just whip one up in solid works. I am amateur at best... I just discovered my filter design will not fit, again. There is a feature on the top plate that pushes down on the filter in the middle. I am just going to re-design it again. This time I am going to try a honeycomb that leaves a hole in the correct spot. I notice the original filter has a lot of draft. I am not sure if I am going to increase the size and put a little draft on the part for a tighter fit, or just wing it. The original filter does not make a great seal anyway. P.S Also you people are rubbing off on me. I am not really a saw collector, or a Homelite person. I just bought a house, needed a chainsaw, happened on a saw, in a box, in my price range and found all you crazy people. I wasn't really trying to drink the punch, but this is kind of fun. I also just agreed to buy an XL-98 of someone locally. Hopefully, I get it saturday. Then I will have 5 Homelites. The first one that will never run, the 240 that does, the 330 that may soon, and a UT-15040c string trimmer that ran for about 10 minutes, just long enough for me to order parts for its use. How many before its a problem? |
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