MV-JR knock out Cylinder

[underthetire]

Thats not too bad. Think the "spur gear" type is the older rack and pinion ATC's (hydraulic). Yours is a cam type, so I dont think there is a spur gear. Has 4 or 6 cam bearings on the end of the shaft of the ATC. Move the arm by hand and see if the slop changes as you go. If it's a lot more sloppy in one spot you have a broken/cracked cam bearing.

[andyhol]

Originally Posted by underthetire Thats not too bad. Think the "spur gear" type is the older rack and pinion ATC's (hydraulic). Yours is a cam type, so I dont think there is a spur gear. Has 4 or 6 cam bearings on the end of the shaft of the ATC. Move the arm by hand and see if the slop changes as you go. If it's a lot more sloppy in one spot you have a broken/cracked cam bearing.

The TC arm is connected to a rod with the collar clamp you talked about earlier, the rod goes up into the the tc assembly on the side towards the back of the machine and closest to the spindle motor not the pot side. This rod goes all the way up to the top of the casting and seats in a bearing there. just a little below that bearing is a spur gear, this gear meshes with a arm that has a partial spur gear machined into the end. This arm is bolted onto another arm to join them together to make one long arm, this I think is where the adjustment point is. If I move the actual tc arm I can see slop between these gears, as in I rotate the tc arm a small amount and the arm with the machined gear in it stays still. I dont think this is a cam bearing issue is it?

[andyhol]

I lied, there is some movement in the drive arm, there only seems to be one cam bearing in there. I will swing my arm a tiny bit and see if it will do better. Might try some grease in the cam groove first :-)

Andy

[andyhol]

It works, marked the shaft and the collar for the arm and rotated the arm about 1/64" and now it seems to change good.

I only have one dilemma, Murphys law would tell me to leave all the covers off, cause sure enough as soon as I put them back on it will stop working :-)

Thanks for the help

Andy

[andyhol]

Newbie settings question for you, I could have swore that every time I zeroed the axis that it would automatically origin the axis, is there a setting the controls this? I have the book, what might be the description of this setting?

Andy