X2 belt drive conversion

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spuddevans:

--- Quote from: bogstandard on May 26, 2009, 06:18:12 AM ---If you have a look at your topslide with the toolpost off, there is usually a hole drilled into the top.
If you can make a matching hole in the bottom of your toolpost, it is just a matter of making a slug to drop into the hole and put the toolpost onto it. This will effectively lock up your toolpost and prevent it turning. Just take the slug out and you can then set your toolpost to angles again.

--- End quote ---
That's a handy tip, I think I'll use that one, thanks John :thumbup:

I got a little time this morning to install the spindle locking slot into the Pulley I just made. I probably should've milled the slot before turning the V sections, but you live and learn.

This is how I clamped it up using a V-block, some spare round bar that was a bit smaller than the bore, and the clamping kit for my mill. I double checked that the bar was not unevenly pulling the pulley off square and plumb, and then tweaked it tighter.

another angle

and then just milled it out with a 6mm mill, and then widened the slot to 8mm. It was pretty rock solid, but even though, I took my time and did not plunge through the 8mm or so thickness in one pass, I think I took off about 1-1.5mm per pass of the middle, and then to widen out the slot I had the mill at full depth and took 1mm off each side in 3 passes (that is 3 passes of 0.33mm not 3 1mm passes :lol:)

Tim

Stilldrillin:

--- Quote from: spuddevans on May 26, 2009, 05:50:46 AM ---
--- Quote from: Stilldrillin on May 26, 2009, 02:12:48 AM ---Thought you might like to see my little mod to allow the toolpost to rotate, only when I want it to..... :thumbup:

A small piece of 1/8" plate, held with a 6mm caphead.

--- End quote ---

Thats neat, but what stops clockwise (as you look down on the toolpost) rotation?

Tim

--- End quote ---

Tim,

There`s a spring loaded rachet/ plunger in the topslide, which only allows it to be rotated anti clockwise.....

It`s probably in the hole which John`s used for his locating pin!

David D

spuddevans:

--- Quote from: Stilldrillin on May 26, 2009, 08:16:20 AM ---There`s a spring loaded rachet/ plunger in the topslide, which only allows it to be rotated anti clockwise.....

It`s probably in the hole which John`s used for his locating pin!

--- End quote ---

Ah yes, I remember taking that spring loaded pin out, I found it irritating having to spin it 360degrees just to turn it a little amount clockwise :bang:

I got a little more done this afternoon, I chucked up a chunk of 50mm ali round bar, turned a 15mm spigot 4mm long on one end. then I reversed it in the 4jaws and turned it down to 1.7" as per the plans for the larger section of the small pulley for the motor.

I also ground up a 5/16" hss toolbit to form the 32degree V-section as per the plans.

I then formed the 1st section of the V pulley

And that's all for today folks,

Tim

raynerd:
You know the large pully - what is the m6 set screw for, does it go through key-way and if it is to lock it to the spindle - how will you get through it to tighten it with the base plate in the way? Sorry for my ignorance - it has just been confusing me.

Chris

spuddevans:

--- Quote from: craynerd on May 26, 2009, 03:17:18 PM ---You know the large pully - what is the m6 set screw for, does it go through key-way and if it is to lock it to the spindle - how will you get through it to tighten it with the base plate in the way? Sorry for my ignorance - it has just been confusing me.

Chris

--- End quote ---

I think it is an additional fixing method, I dont know why its there as the locking ring will hold the pulley on the spindle, and the keyway will lock the pulley from being able to freely rotate. If you do install one, if you position it on the same plane as the spindle-locking-slot-hole you should be able to tighten the set-screw through the spindle lock hole in the baseplate.

Hope that makes some sense.

Tim

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