4 Sep
2011
4 Sep
'11
11:43 a.m.
On 04/09/11 15:30, Tony Duell wrote:
Well the plan was to use a few plastic or metal shims, a piece of metal
rod and the glass workbench to make the roller. That damned taper
basically writes that plan off :-/
And unfortunately I don't have any dry ice (solid CO2). Grrrr.
Do you mean the screw-down jackposts on the
chassis-mounted connector?
Yes. One of them is present and screws in properly, the other appears to
have a male thread which is too small -- it just spins in the hole.
In my 7470, there appear to be E-circlips on the ends
of the clamp arm
pins that hold these rollers. I assume that removing said circlips allows
the rollers to come off. I can take mine apart if you like.
Ah -- there they are! Spotted them once I gave the roller tips a good clean.
It appears these rollers have as rigid hub with a
rubber tyre. I don't
know if the hob is tapered or not.
It's a polyurethane tyre; the hub is 6/10 nylon with eight teeth around
its radius.
Who said
anything about machining the roller? :)
A lathe is a traditional way of making something with a circular
cross-section :-) I'd thought about using something like Devcon 90
for this, but it's darn
expensive, and the problem of making the mould still applies. For
something this size, it's a lot easier to make an external taper than an
internal one...
Too true...
Or another option would be to make a metal version of the required part,
cast it to make a mould, then use said mould to cast a new part out of
whatever material you like.
Far more effort than it's worth though, IMHO. Easier to just make the
damn thing....
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/