Hello William (and others that have worked with this printer),
I am trying to mod this printer (in fact a c63 wich I was told it is the same printer), like you did. At first, I am trying to make it print on very thin PCBs. I know it is not the ideal situation, but I have no ideia so far on how to make nomal PCBs to fit - I am still trying to totaly understand your photos.
Anyway, when I removed the part of the printer that feeds the paper - located at the back part of the printer - in order to creat a straight path to feed the PCB, I have exposed the printer sensor, and could not print no more. Then I assembled this part again, and I could print.
Is this the only sensor of the printer? I am prety sure the sensor expects for the paper feeder to activate it somehow. WIth the paper feed removed, it just passes the paper very quickly withour printing.
Have you experienced a similar problem? Have you simulated the expect sensor behaivor? As I understand it, you just moved the sensor with no problens, but just want to be sure and get tips on how to solve my problem.
Thank you for any info on this subject!
[]'s
- Uderman
http://www.temadigital.com.br/ --- In Homebrew_PCBs@yahoogroups.com, William Nelson <wnnelson@...> wrote:
>
>
> 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.
>