production time and big mistakes

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Blog entry by sawblade1 posted 04-26-2010 04:28 AM 843 reads 0 times favorited 1 comment Add to Favorites Watch

This weekend was a lesson in taking your time and not rushing through a job :(
This Saturday started off with getting the usual four chairs worth of lumber and in bounding it through my wood planer all went well except I started getting antsy trying to get production time under two hours per chair, well that was impossible considering I had already spent 35 minutes milling lumber :(
The haste makes waste principle accelerated as I made more mistakes and tried to rush to fix these, only to make more!!!! One chair went perfect!! Got one chair stuck in my jig literally glued in from the glue!! After that I started on the third chair then only to make it crooked in the back, not finding this until I already released the chair. time lapsed,- six hours THREE HOURS PER CHAIR this is before finish :( after talking with a good friend they recommended using my old shop space and shed for assembly and I am going to try an article I read online with the next set of chairs of using component based manufacturing I don’t know how well this will work or if it will help any :( Do any of you fellow lumberjocks have any suggestions ?
hopefully next week goes smoother.

-- Proverbs Ch:3 vs 5,6,7 Trust in the lord with all thine heart and lean not unto your own understanding but in all your ways aknowledge him and he shall direct your path

1 comment so far

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1027 posts in 3513 days

#1 posted 04-26-2010 05:41 AM

Perfecting a production process (realizing efficiencies – time and money) can be a real trial and error process. Unless a major process overhaul is needed (in your case rearranging your shop layout, new equipment, etc.), most companies will try to tweak the process already in place here and there until all of the inefficiencies are wrung out. A tweak may be as simple as moving a work table one foot closer or further away, or raising the work table 4 inches higher, etc. Typically the more jigs you can make to reduce setup time and increase quality and consistancy in your product, the better your production run time will be.

In building a chair, or set of chairs, a process engineer may break the process down into 200 or 300 steps, to the point that when you rip a board, you will know where you left or right hand will pick up the board, how high you will lift the board, and the exact position you will place the board. Kinda like a robot. That’s why production and automation go hand in hand. The various subproceses will take into account safety, energy expended, ease of function, etc. You will know when you reallly start to perfect the process because it will feel right, your job will become easier, and you will get more work done with less hassle. A good process plan is well worth the effort. Good Luck.

-- Better woodworking through old hand tools.

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