Lapidaryforum.net
Gadgets, Gizmos, and Dohickeys => Fixing, Modifying and Refurbishing your Lapidary Equipment => Topic started by: gfisher on August 16, 2017, 08:15:28 AM
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I am trying to get a 24" Royal saw going, but it doesn't have any belts. Is there anyone that has a Royal Saw that they can send me a picture of the belt setup? I tried to put the belts in the configuration that I thought they should be, but the rock feed ran backwards.
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use a sting to measure the belt size needed.
Machine belts wont stretch.
Automobile belts are made to stretch in high heat conditions.
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Thanks for the tip. I can get the belt size, but not sure which pulleys they need to go on to make the feed go forward. Sorry for the picture to be upside down.
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I have an old home built 24" saw that looks something to that.
I would take one belt from the motor to the big pulley on the blade drive with the tensioning pulley
The second belt should go from the small pulley on the blade drive to the pulley on the feed drive. I run mine on the smallest pulley so I have the slowest drive speed. May need some kind of spring on the tensioning pulley. I can't see what applies pressure to the pulley.
That's my best guess, I could be wrong. If some can find a picture it will help
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Is the blade running in the right direction?
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Not sure if there was suppose to be a spring on the tensioning pulley, but there is nothing now that holds the tension. The blade is running in the right direction (downward on the rock or clockwise facing the pulley side).
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This is how my 24" Frantom is set up. Looks real similar to your Royal... :dontknow: There is no spring, you can tighten the nut a bit and just pull the lever into the belt to tension it, acts like a clutch if the drive gets stuck...
Bill
Might help to turn your saw over too! :toothy10:
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Thanks Bill. That was the way I would do it too, but the feed turns backwards. I'm not sure why the pictures were coming through upside down. The files were upright on my computer.
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????? When you say the feed turns backwards do you mean the rock vise pulls towards the front instead of going into the saw? If so, is the saw blade also running backwards? It would be truly odd IMP for one to go the correct direction if belts are on correctly. I have seen where both run backwards because of an incorrectly wired motor.
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That's correct, the rock moves away from the saw, but the saw is cutting in the correct rotation. I even reversed the wires in the motor but the saw was cutting upward through the rock, but the feed was going into the saw. The only way I've been able to make it cut correctly is put a figure 8 in the small belt that goes to the feed.
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I believe the angle drive must be assembled backward. I don't remember if the drive shaft should be above or below the driven shaft, but see if you can reverse it.
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Is the large gear on the end of the feed drive turning clock wise. Everything should turn clockwise. It looks to me like all of the gears and all of the pulleys are running clockwise. The threads on the feed drive that pulls the vise into the blade should be standard threads. They would have to reversed thread to run the vise backwards. Strange?
The picture that stone man posted looks like the correct configuration for your saw. My saw has an extra pulley to reduce the speed of the feed drive.
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Please post a picture of the worm gears that drive the vise. If your blade is going clockwise (throwing oil towards the front of the saw) it will be easy to see if your gears are correct. I would find it hard to believe they are reversed but it will be easy to tell from a picture and anything is possible.
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Attached is a picture of the worm gear on the back. It doesn't appear to be any way to move the drive shaft on the bottom of the gear. The blade throws oil to the front of the saw.
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Have checked the half nut? I have had my 18" saw strip out a couple of times. If it is not locking up the vice could vibrate and move away from the blade
i would open the saw and run it ( if you have oil in will Have to Take the blade off) and see if the drive is rotating and turning the correct direction
Your picture looks like everything is turning clockwise.
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Thanks for the suggestion, I have looked at the half-nut and it is skipping, so will be looking at replacing it to see if it's the problem.
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I got a tap and re threaded mine. I had to grind the face down to get enough to cut the threads deep enough. I know that highland park has the half nut for the fram Tom saws. I don't know adout the Royal
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Everything appears to be correct. If the blade is turning in the correct direction, the angle drive should pull the vise into the blade. That is, assuming the feed shaft is right hand. I can't imagine anything else.
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Down to basics, not rocket science. Without any belts on the machine turn the pulley that drives the worm gears the normal direction, ie: the direction that makes the saw blade throw oil toward the front of the machine. just hold the half nuts on the threaded shaft and see if it pulls toward the saw blade. It takes a lot of turns as this is really geared down. If the threaded shaft pulls the half nuts towards the blade all is well so far. Do this with the machine unplugged and the saw blade removed. 10 minutes and you will know if everything is correct for drive operations. *** All of the threaded shafts I have seen can only be put on in one direction. You would need to have the wrong or homemade shaft and reverse threaded nut to go backwards so the odds are you have a different problem.
I just replaced my entire jaws with half nuts, mounting plate and half nuts with new parts from Highland Park manufacturer. These were put into an old 18 inch Frantom which now runs perfect. The parts were too worn out to salvage. I could have done it cheaper but this is part of my retirement gift to self.
There are numerous problems that lead to worn out half nuts and vices. Make sure the vice moves smoothly but cannot rock in any direction when pulled or lifted on. If the vise does not move smoothly with a firm push it is too tight. If it shoots down the carriage like a rocket with a nudge it is too loose which is also bad. These are critical adjustments if you want smooth slabs.
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Thanks again to all for the comments, I will be looking into the threaded shaft and the 1/2 nut to see if there is a problem with the feed.