Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I modded a C88 without hacking the frame. I made new bushings for
the drive shaft which lowered it by .100".

I'm trying to understand what I see in those pictures. Are the new
bushings to the far left and right of the picture with the originals
in the center?

Yes, these were new bushings made with the same deminsions but with the shaft hole lowered by.100”
How did you make those? Did you mill or turn them from plastic stock?
Turned them on the lathe out of Derlin. Very easy to do with a four jaw chuck to do the offset.

I trimmed off the outfeed rollers to give a flat carrier path and moved the paper sensor to
the front. This allows a carrier with no cutout notch for the timing.


I'm confused by "trimmed off" and don't understand what you mean. Did
you remove them?

There are rubber rollers on the outfeed bar which I turned down to a smaller diameter to achive a
flat feed path. The ratio is not the same and it will not pull the pcb out at the same rate as the
feed bar but there is no pressure on the PCB so it feeds out nicely.

I put a smaller gear on the end of the drive shaft for the vacuum pump because there was no room
for the original gear.

Where did you get the gear? Junk box? Did you measure it? Any chance
we could know what sort of gear to order?

I figured out what size I needed to make it work and ordered it on line. I do remember it was
metric but I don't remember the pitch or number of teeth. I just threw away the order sheet but I
will try to look up the size and post it later. If you have a lathe this is a easy mod but without
??? I hope you have a friend with one. I will try to get the cad drawings posted soon of the
parts.