showet
Cave Dweller 
Member since June 2015
Posts: 65 
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Post by showet on Feb 14, 2019 21:12:31 GMT -5
I am rebuilding some saws and cabbing machines for our rock club and my current project is an 8" Raytech Gem Maker cabbing unit. I have not been able to find a manual for this and there is something that I am not sure how it works.
Excuse my poor pictures. I dropped my phone and there are spiderweb cracks in front of the camera lens.
There is a handle on the front of the cabbing machine as shown in the picture that follows. the handle lifts the motor to increase the tension on the belt.
The motor can be lifted and locked down in three positions as shown here. (Grind, sand, and polish.)
I don't understand what is the purpose of this. Why does increasing the tension make a difference?
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,359
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Post by quartz on Feb 14, 2019 23:31:54 GMT -5
It's not necessary to have the machine running to have a look at the belt but take a look at both the drive and driven pulleys at each of the grind, sand, and polish positions on the machine front. You will see one side of one or both pulleys slide sideways a bit, changing the ratio between drive and driven pulley, thereby changing the arbor speed.
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zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Feb 14, 2019 23:42:45 GMT -5
It's not 3 positions. You can set it anywhere you want for an infinite number of speeds.
From what I remember, it's easiest to change speeds while it is running.
Lynn
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,359
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Post by quartz on Feb 15, 2019 23:49:19 GMT -5
I mentioned the three positions only to make an explanation easier from a "look at the pulleys aspect", the adjustment is indeed infinite within the lever travel and related pulley change. I agree that changes made while the machine is running work better.
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Post by sophia13 on Feb 16, 2019 13:33:29 GMT -5
I have the same machine. It appears to be a beast. Haven't used it yet. Eager to but bought a stainless 6 wheel lortone unit. I have to hook water to it. Anyone with thoughts on the Gem maker I'd love to hear from too.
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Post by sophia13 on Feb 16, 2019 13:35:13 GMT -5
I am rebuilding some saws and cabbing machines for our rock club and my current project is an 8" Raytech Gem Maker cabbing unit. I have not been able to find a manual for this and there is something that I am not sure how it works.
Excuse my poor pictures. I dropped my phone and there are spiderweb cracks in front of the camera lens.
There is a handle on the front of the cabbing machine as shown in the picture that follows. the handle lifts the motor to increase the tension on the belt.
The motor can be lifted and locked down in three positions as shown here. (Grind, sand, and polish.)
I don't understand what is the purpose of this. Why does increasing the tension make a difference?
Please share your rebuild with pics would love to see as I have the same machine. |
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