(Topic ID: 129917)

Modified Doctor Who mpf elevator

By darkpinball

8 years ago


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#2 8 years ago

More pictures!
More pictures!
More Pictures!
More Pictures!
More Pictures!
faz

#8 8 years ago

I see the washers, but not the bearings. It looks like the standard rollers. Is this something different?

Someone a few years ago made rollers out of UHMW Plastic. I tried to get a set but the guy went dark on the forum.

If you end up creating some, I'm in! I should try doing this myself. I have a lathe and plastic cutting boards that can be sacrificed. However, there's that 'skill' thing I don't have for turning small parts.

More pics and vids!

btw... that's the coolest freaking test jig!!! An over-engineered wonder (like the MPF in the first place). Zofia Bil would be proud. I LOVE IT!!
faz

#22 8 years ago

That is SO sweet! Nice work.

Having tools AND skills.... what a combo! I have lots of tools....but alas, a fool with a tool is still a fool

What's the top of the MPF look like at the top of the stroke? Any wobble or did that new AWESOME bearing/washer combo fix that.

Thanks,
faz

#23 8 years ago
Quoted from pinball_faz:

What's the top of the MPF look like

WITH WEIGHT

#28 8 years ago
Quoted from darkpinball:

How durable are the washers?
How durable are the ball bearing on the shaft of the cam?

Consider that mostly collectors / DW worshipers are going to be applying this fix.... it probably won't be seen on route. If it does find its way on route, the operator is a class act that want's the best for his machine. If it fails, he'll kick in a few dollars for a replacement for a great machine.

Make a call for "beta" users. We'll test it out and tell you what works / what does not work.

faz

#31 8 years ago

I think the bigger issue might be the modifications that you are making to the fasteners. I can't drill/thread the posts. This could be done as a service, but the shipping would probably make it an issue.

Is there anything you can do to make the e-clips survive? Super thin / high density washers, sheet material to coat the bracket... or a sleeve that goes over the existing posts that extends the reach.

faz

#40 8 years ago

There was a post a few (5-6) weeks ago of a unique design. I can't find the post.

The side brackets were replaced two rods about 1/2" diameter. Pully rollers (or something like that) traveled the length of the rod.

faz

#42 8 years ago

Loosen the screws holding the bracket on the main playfield and the MPF. Then push away from that corner; retighten. If that does not do it, the frame is bent and will need to be tweaked. A bar clamp is good for tweaking.

You can also elongate the holes. Is that an original MPF surface or the CPR repro?

faz

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