Thread: Giant 20' x 3' x 2' router build
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07-08-2014 #91
Section 10 page 45.
http://file.lasersaur.com/docs-third...ming_Belts.pdf
I just used the same technique as putting an alternator belt on, stick a large screwdriver in behind the motor and lever it out until the belt is at the 'correct' tension, now tighten the bolts.Spelling mistakes are not intentional, I only seem to see them some time after I've posted
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08-08-2014 #92
i guess that keeps things simple! the pulleys i have have two grub screws for securing however the shaft is totaly round, whats best to do there? put a flat for them or drill a hole or something? cheers charlie
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08-08-2014 #93
Use two grub srews M4 will do, these MUST be 90 degrees apart around the pulley boss (i.e. NOT opposite each other). File a small flat on the motor shaft for one of these screws only. Where the flat is, use a flat bottom grub screw, for the other screw grind it to a point so it digs into the shaft once tightened.
Last edited by EddyCurrent; 08-08-2014 at 09:53 AM.
Spelling mistakes are not intentional, I only seem to see them some time after I've posted
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08-08-2014 #94
cheers many thanks thats great will get on to that
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The way I have done mine is to put a copper plug (pad) into the grub screw hole. I have done this by using a bit of solid core earth wire from twin&earth cable just lightly swash it with a hammer and then cut a piece off that will fit down the hole so that the flat bit is on the shaft then just tighten the grub screws. That way you don't mark the shaft.
I have found that it is not necessary to put a flat on the motor shaft. ..Clive
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08-08-2014 #96
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12-08-2014 #98
belts arrived, i had to go with 5 teeth less on the motors to get it to fit unfortunately well unless the belts stretch a fraction as it is right between sizes.
Last edited by charlieuk; 28-11-2014 at 12:45 AM.
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13-08-2014 #99
I mentioned it in a post earlier that i am geting a small amount of flex from the main back uprights which for the surfboards really isn't a problem as the load on the machine will be close to nothing cutting foam however i would like to try and reduce it as much as posable. I have been wondering about two options the first being bolting a pice of 90deg angle steel to each leg ( i cant get large enough channel or T section) and the second idea was to fill each of the current aluminium legs with a resin/granite mix or maybe even a concrete mix which i have been reading about which may help in other ways as well.
Can any one give any suggestions as to what may be best?
many thanks
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13-08-2014 #100
any one got any ideas to the above?
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