Web Goblin cnc has begun

Ither a FK or FKA depending on what model mount hes go!

I read it as the shaft has moved through the bearing block, which in turn has pulled the lovejoy into contact with the housing...

Quote:

---

Originally Posted by m_c

I read it as the shaft has moved through the bearing block, which in turn has pulled the lovejoy into contact with the housing...

---

Ye but what shaft.? Motor shaft.? or Screw shaft.? Either way neither should be floating.? . . .something seems strange.!

This pic from earlier in the thread reveals all.
Attachment 4012

The motor coupling would have enough movement in it to allow the pulley shaft to hit the mount without losing drive.

The shaft that connects the motor to the x axis pulley is the one which has managed to move through the bearings so that the coupling was rubbing against the motor mount.
Attachment 4717
A picture of the complete motor mount. I didnt think that the shaft would travel through the bearings so I didnt fit any locking collars. I will make them and fit them on the motor side of the last BK mount before the pulley. This will stop any further movement.
I suspect this has been caused by the pull on the shaft from the tension on the pulley belt but this is a guess. Seeing as I had to hammer the shaft through the bearings I really didnt think it would move.

Ian

m_c,
thanks, I really need to learn to type with more than two fingers.

Ian

Quote:

---

Originally Posted by Web Goblin

Seeing as I had to hammer the shaft through the bearings I really didnt think it would move.

---

I feel sorry for those bearings. Hopefully you just hammered on the inner ring. Often heating up the bearing first does the trick if it's that close.

Quote:

---

Originally Posted by Web Goblin

thanks, I really need to learn to type with more than two fingers.

---

Then learn with this, you won't regret it. I have been using this layout for about 5 years now:

http://www.dvzine.org/

Jonathan,
I dont like heating up bearings. I just normally put the shaft in the freezer for a while and yes I used a tube the same diameter as the bearing inner to hammer the shaft in. With a nylon hammer I might add.

Ian

Quote:

---

Originally Posted by Web Goblin

The shaft that connects the motor to the x axis pulley is the one which has managed to move through the bearings so that the coupling was rubbing against the motor mount.
Attachment 4717
A picture of the complete motor mount. I didnt think that the shaft would travel through the bearings so I didnt fit any locking collars. I will make them and fit them on the motor side of the last BK mount before the pulley. This will stop any further movement.
I suspect this has been caused by the pull on the shaft from the tension on the pulley belt but this is a guess. Seeing as I had to hammer the shaft through the bearings I really didnt think it would move.

Ian

---

Argh I see now but I would call this the Y axis and the earlier post said X axis thats what's thrown me.!!

Quote:

---

Originally Posted by Web Goblin

Jonathan,
I dont like heating up bearings. I just normally put the shaft in the freezer for a while and yes I used a tube the same diameter as the bearing inner to hammer the shaft in. With a nylon hammer I might add.

Ian

---

You don't have to heat bearings up that much. 100degC is more than enough for installation, and it won't do any damage to the bearing or whatever grease is inside it.
Often sitting them on top of a hot radiator for an hour or so is enough to give that bit vital clearance for easy installation.