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Post by sophia13 on May 16, 2018 21:50:11 GMT -5
Hello All, Picked up two saws and they turn on but neither auto feeds work when I flip the switch. Saw an old thread about 7 yrs old on here but nothing recent on how to trouble shoot or what kind of motors they are and where to find them. Not even sure what type of shop would/still works on this stuff. I'm certainly no technician or engineer so any help would be appreciated. Having a hard time finding any info on the older Raytech equipment (also have an 8" Gem Maker) would love to find manuals or schematics for them. Update---Did Find the 10" saw manual and 8" Polisher/Grinder manual on Rick's new site. WOOHOO!!!!! He also has motors and hoods-so making progress. 
Thanks for any help
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Post by pauls on May 17, 2018 5:55:12 GMT -5
I'm not familiar with those saws but I replaced a feed on the saw at my club and used a rotisserie gear motor from an old oven. The other saw was just too far gone it would have been a complete rebuild and fabricate everything from scratch job so I converted it back to a weight feed, easy and effective.
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boynabox
off to a rocking start
Member since October 2014
Posts: 2 
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Post by boynabox on May 17, 2018 13:02:32 GMT -5
Hi,
Saws of this type use small ac gearmotors turning at 4-9 rpm. The design hasn't changed much in the last 60 years. The trick is find the right speed to match your feed needs. Don't really see the need for powerfeed on the 6 inch, but then, I don't do lapidary.
Lortone units might bolt right in.
If you don't know your way around 115 vac wiring, find someone who does (Don't be shocked).
If the motor will turn, look for halfnut or drive dog engagement issues, likely to be worn.
A small DC geamotor with variable speed would be cool, but you would need further knowledge to wire in a transformer etc.
Kinder Gardens
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Post by pauls on May 17, 2018 16:03:36 GMT -5
The current draw .3A .5A etc is the power of the motor, nothing to do with the speed. Either should do.
The gear motors usually have the specs printed on them somewhere, you are looking for something around 6RPM probably. (check the old one)
Before buying a new motor dismantle the feed mechanism, take lots of photos so you remember how it goes back together. Disconnect the feed screw and see if the motor will turn with nothing connected, Take the cover off the motor and check its not full of dirt, gears and dirt dont go well together. It's probably just something in the feed screw drive chain gummed up with old oil and gunk.
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Post by sophia13 on May 17, 2018 16:31:24 GMT -5
Will do pauls. Thanks for the input, also spoke with Rick at Raytech (very nice guy) and he has motors and hoods too. So worst case, I've got original parts options also. |
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on May 18, 2018 2:02:30 GMT -5
I have both the 10" and 6" Raytech saws and without going out to the shop tonight to pull off the switch box cover to check, I'm pretty sure both use a 4rpm motor for the power feed. Also they come wired from the factory so that the power feed motor will only turn if the power to run the blade is turned on as well. So if when the power feed lock lever is disengaged, and both switches are turned on, the threaded power feed shaft isn't turning then the first thing to check is to make sure that the set screws in the coupling that joins the threaded power feed rod to the power feed motor shaft are tight.
If the threaded feed rod does turn when the power feed lock lever is disengaged but doesn't when it is engaged then give the threaded power feed rod a good cleaning with a fine wire brush and 3-in-one oil or WD-40.
I've bought and sold several used saws and have found that more times than not if the power feed motor isn't working after the above then it's either a bad switch or the grease in the gear case of the power feed motor is dried up and preventing the reduction gears from turning. Replacement toggle switches are available at most good hardware stores. And the gear case on the power feed motor can be opened and the old grease cleaned out and replaced.
If all that fails, then it's new motor time.
Larry C.
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Post by sophia13 on May 25, 2018 19:39:23 GMT -5
Update-----------I ordered the 3M098 Dayton motors from Grainger for only $18 a piece plus shipping. They are the same motors that were in both my saws to the T. 4rpm and bolted up exactly. Two wires and what do you know.....I have working Autofeed!!! May not seem like a big deal but I am no DIY kind of guy but with tips from you guys I was able to fix my saws. Grainger has these motors on clearance so get them while you can. Thanks for all your help. |
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