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Post by gramophoneshane on Nov 15, 2006 9:49:49 GMT -5
Hello all,
I have a model B home with 2/4 min gearing.When I play 2 mins,its fine- but lately when I play 4 min records, it has a tendancy to move back to the 2 min position while the cylinder is playing. Is there something I need to adjust or tighten, or is something wearing out?
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Post by maroongem on Nov 15, 2006 13:39:25 GMT -5
First off, do you change the gearing during mandrel rotation(and before playing the record) or before? Changing the gearing while the mandrel is NOT rotating can cause it not to mesh properly.
If you do it while rotating and it "pops" out, you may have to remove the two intermeshed gears at the end of the feed screw and clean them out. Any old gunk inside can prevent them from meshing properly.
You may also have too much "end play" between the swing arm and the gearing.
Let me know what you find.
Bill
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Post by gramophoneshane on Nov 19, 2006 4:24:35 GMT -5
All fixed now thanks Bill.It was in need of both a clean and adjustment, but seem to be working well again.
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Post by gibsonj on Aug 24, 2010 15:47:15 GMT -5
Bill
What is the proper way to set the "end play" between the swing arm and the mandrel tip? Do you just go by what feels right, or is there a more scientific way, like a feeler gauge?
Thanks
John
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Post by maroongem on Aug 24, 2010 17:03:41 GMT -5
Hi John,
Where you may have a 2/4M combination found typically on the HOME D or E rather than the one that was originally offered for earlier machines with an endgate, you may have to turn the setscrew that meshes with the bearing found on the endgate in and out coupled with the setscrew and bearing at the opposite end until you get the proper adjustment needed to allow the inner pulley to mesh with the belt pulley for 2/4M play.
I usually polish the pointed end of the mandrel with some scotch brite as well as inside the bearing.
Bill
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Post by gibsonj on Aug 25, 2010 7:39:42 GMT -5
Bill
OK, that makes sense. I'll give it a try. Thanks.
John
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Post by maroongem on Aug 25, 2010 17:00:35 GMT -5
John,
One thing I forgot to mention is the adjustment of the main pulley (especially if you have a setup from a D or E) is that there is a countersunk set screw in the center of the recess for the belt that is approx. .250 in length, and this sits against a floating pin that puts pressure on the mandrel shaft when the set screw is turned in. This arrangement allows you to move the entire 2/4 gear change in or out to allow that button on the lesser diameter of the gear shift pulley to fall into the groove on the mandrel shaft and get the proper in and out movement for the gear change.
A word of caution if you have to remove the belt pulley. That floating pin has a tendency of falling out through the bottom hole and can be lost quite easily. (I know this from an early experience!)
Bill
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