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Chain saw redesigning project

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Rogier Kuiper

02-10-2003 07:59:26




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We are a group of 5 students doing a design project. We are redesigning some parts of an electric chain saw. We have already analyzed a Bosch consumer chain saw. For this project we need information about consumer experience with electric chain saws. We would like to know witch parts are the most vulnerable and break down first. We are interested in everything consumers find annoying about this peace of equipment.
We already heard some complaints about clogged oil pumps or pumps that use to much oil. Are there people who concur? Are there ergonomic issues that should be resolved?
What about maintenance?
All our redesign efforts will be used by Bosch for further development of a better consumer product.

Thank you to answer some of these questions

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dave

02-15-2003 09:46:35




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
Give this some thought, put a spring on the bar with a cam to tighten the chain, The only time you need a tool is to replace the chain? Perhaps throwing a cam over center etc. Many a chain has broken or thrown because of improper chain tension. Another idea may be to have a oil fill cap and gas cap that is similar to some oil cans in the 5 gallon type. You could reach in the hole to pull a loop up thus pulling the cap upwards so you could clean with a tooth brush, fill and push down so it doesn,t get busted. I have repaired many saws that were not oiling because of dirt in the oiler. A cap that is extra long like a 2-3 inches to keep dirt away from the fill cap. Or maybe a cap with top threads for a second cap on top to keep the dirt off the main fill cap? How about a chain number with less than 50 numbers, like some of the ink jet printers have done. While in town you could pick up a chain without being real smart and all.
I have one saw that you need 3 people to operate because of all the saftey crap that makes it imposible to run, especialy with gloves on. I kind of think engineers think all trees are laying flat on some saw horses at waist high. ON and on I go but when they make a blow case for the saws, why not make it larger with a decent compartment for the tools, files tooth brushes, extra chain, plastic wedge etc.

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Dennis Benson

02-12-2003 11:15:49




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
I've been a small engine mechanic as one of the different mechanic jobs I had, and worked on a lot of chain saws. I found that electric chain saws are not meant to be worked on. Why not make them so that parts are readily available to repair them, and build them better, they are not toys. Also, why not make them switchable between 110 volt and 12 volt? That way you can run it from your car, tractor, or truck battery with a standard extension cord. On gas chain saws, why not include a starter motor with a belt mounted battery pack for starting? I'm disabled now, and it would be very helpful to have the trigger easier to use. Everyi=one is right about the oiler, some don't work, and others work too much, and if there is an adjustment, they don't work. They should take the electric chain saw users seriously.

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Rogier Kuiper

02-12-2003 01:08:14




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
Thank you all for your numerous reactions. We will try to formulate solutions to the problems you mentioned. Keep on sending reply�s, they are all very helpful



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Slowpoke

02-11-2003 23:38:34




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
The electric saws I've had are made to be used on a pole also, and the plastic case cracks where it is fastened to the pole, due to the weight. The mounting/materials need to be improved.



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Skinner

02-11-2003 19:15:04




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
Mine only has a cord about 6" long on it. Now, tell me how often you find a tree 6" away from an outlet??



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Jonathan

02-11-2003 13:26:23




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
then theres that pesky cord thats always waiting to be cut....whats up with that ???



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KEG

02-10-2003 17:45:29




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 Re: Chain saw redesigning project in reply to Rogier Kuiper, 02-10-2003 07:59:26  
One item I recently struggled with on my Husqvarna chain saw was the lack of information on the chain specs. I needed a replacement, but couldn't find the info without going to the dealer and having them look it up. So, I would recommend the saw have chain info stamped on the bar - and not just a code. It needs the guage, links, etc. in plain language so you can go to any store and get the right chain.

Just my $0.02
KEG

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Wayne

02-10-2003 21:17:31




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 Re: Re: Chain saw redesigning project in reply to KEG, 02-10-2003 17:45:29  
I don't know if all Huskys are the same, but on my 55 there is a replacable driver that can be changed out due to wear, or changed to a different size to handle a different pitch chain. In my opinion this is a great design for those who run more than one type of saw as it allows them to make the Husky match the other brand, allowing them to only keep one size chain on hand for both saws. Electric or gas, this would be a great design to incorporate in any saw.

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