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Author Topic: Squaring up jigsaw cuts... save me!  (Read 1062 times)

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Mattiekrome

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Squaring up jigsaw cuts... save me!
« on: December 01, 2018, 11:47:48 pm »
About 6 months ago I started putting together a Vigolix out of one sheet of 3/4" MDF.  I don't have access to many higher end workshop tools, so ended up taking it super slow and easy with my jigsaw and really screwed it up bad.  Even though the cut on top looked good, the underside cut moved all over the place, in some areas maybe even up to 1/8" off my intended line.  Needless to say, I don't have 90 degree cuts.  I got discouraged and shelved the project until just this past week.  I decided it's time to fix it. 

I did some looking and found that this can possibly be fixed with a hand router and certain kind of bit.  I do believe I've got access to a router, but likely do not have the bit needed, which I'll just pick up when I find out what I need.  Now the question...

Both sides of the cabinet are pretty much the same size, but definitely don't match up due to the drift of the jigsaw blade.  I've never even used a hand router, so forgive my lack of knowledge on them.  From my understanding I can buy a 'flush trim bit' or 'pattern' bit (not sure, I've seen both mentioned).  I don't really have a very good template to go by, but was wondering if I needed one at all?  Could I just run the bit around the outside and have it square it up, even without a pattern to go by?  Once square I could use the 'good' side as a pattern for the other side.  Even more so, if I got a long 2" bit, could I just clamp the sides together and square them both up at the same time?

Something along the lines of this?  https://smile.amazon.com/Yonico-14130-Template-Router-4-Inch/dp/B00KZM1ES0/ref=pd_bxgy_469_3?_encoding=UTF8&pd_rd_i=B00KZM1ES0&pd_rd_r=c6cf27a9-f5e9-11e8-a28e-8b2b3716acbc&pd_rd_w=LyCSV&pd_rd_wg=z6hyB&pf_rd_i=desktop-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=6725dbd6-9917-451d-beba-16af7874e407&pf_rd_r=EH16JTBTV2VYPY0XKPBS&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=EH16JTBTV2VYPY0XKPBS

Noobish question, thanks for any help!

jennifer

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Re: Squaring up jigsaw cuts... save me!
« Reply #1 on: December 02, 2018, 04:37:59 am »
The bit would follow the bad cut and basically duplicate it, Jennifer would take the best of the two, smooth the edges square with putty and then use that as a template to cut new pieces (imperfectins will transfer must be what you want as far as square and smooth goes)).... As for the router,  a dangerous machine with a lot of torque, make sure you are familiar with the safety aspects of it before anything, but the collet is probably for 1/4 or 1/2 inch shanks I would prefer the 1/2 if you have a choice (they do cost more) (although 1/4 is fine for what you are talking about) and will have a bearing on the end to ride on your template. Cut one at a time, in case of problems you are only messing up 1 piece not 2. 
« Last Edit: December 02, 2018, 04:42:44 am by jennifer »

Mattiekrome

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Re: Squaring up jigsaw cuts... save me!
« Reply #2 on: December 03, 2018, 10:09:47 pm »
Thanks for the tips Jennifer   :)

bperkins01

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Re: Squaring up jigsaw cuts... save me!
« Reply #3 on: December 12, 2018, 08:01:50 am »
You picked the right bit to square up the cut (flush trim bit) - you certainly cannot freehand it to clean up cuts.  I also do not recommend trying to do both panels at the same time.

I on all your straight sections - double stick tape (or screw) a straight edge on the line you want to be clean - then use the router to fix it..
On the curved sections - you may need to clean them up by hand if you do not have a curved template to follow.

Once you get one side fully cleaned up.  Use it to do the second side.

Two reasons why the jigsaw went off course:  Lower quality saw will do that or cutting too fast and not letting the blade to the work.  In general I do not rely on jig saws to make good cuts.

On my build - I used the jigsaw to get close to the line - and a router with pattern bit to finish..
HTH
My Arcade Build and other projects here:
https://bperkins.wordpress.com/