The score reel arms on my Hollywood are pretty shot.
They have started to split which is making the fingers miss the tracks on the board causing me all sorts of issues.
score_armV2_a_(resized).png

From what I've seen getting replacement arms is virtually impossible, so I've decided to have a go at 3D printing replacement ones.
The one in the photos below is version 3 and I'm finally feeling its close enough to try to fit it to the game.
score_armV2_b_(resized).png

I managed to get brass hollow rivets off ebay and in the next day or two will carefully drill out the old rivets on the original arm so I can use the fingers on the new arm.
score_armV2_d_(resized).png

Once I am happy that everything is good with the part I will make it available to everyone to download and print, but I wouldn't be at all surprised if I still need to make a few more tweaks to the part before its ready.

Test fit of it on the score reel
score_armV2_c_(resized).png

Here is a better picture of the part in Sketchup.
score_armV2_(resized).png

I'll update my progress in the next few days.
I do really love my 3D printer....

Nearly there.
Printed Version 3 which you can see I was off with my measurements by quite a bit.
score_armV3_(resized).png

I just printed Version 4 which is nearly there, but I will adjust the rivets holes over another 0.2mm to try and get them exactly over the track.
too late to do any more tonight. I'll hopefully finish it tomorrow night.
score_armV4_(resized).png

For anyone contemplating this if you decide to drill out the rivets to remove the fingers from the old arm there will be no going back as the rivets are fixed very tightly to the frame and the fingers and to remove them will destroy the old arm.

I printed the part with ABS and used black as I've heard its meant to be stronger due to teh pigments used but I've got no evidence to back that up.
Now I'm hopefully printing the final version and have given it 3 outlines rather than the usual 2 to make the rivet holes stronger and with 85% fill.

Time will remain to be seen if it will last, but the other parts I printed 10 months ago are still going strong.

https://pinside.com/pinball/forum/topic/chicago-coin-hollywood-3d-printed-part

I'll post photos once I'm done

Finished, its on my machine and hurray I can play the machine again now my score reels zero out.
The new wiper is fitted to the tens reel on the second player but I have not yet tried 2 player games.
My machine was rough when I purchased it and missing the U shaped bracket that holds the coil on one of my score reels, which is the score reel I just fitted the new arm to.
I now need to manufacture a new coil bracket and EOS switch for it and then we can finally have 2 player games.
I was planning on making these parts this weekend, but being it is now going to be over 40C on the weekend which means it would be over 55C (131F) in my workshop it will need to wait until the weather cools.

Here is the new part with the fingers riveted on, you will notice one set of fingers is slightly off centre due to it slightly shifting when I riveted it, but its good enough
score_armV5_(resized).png

score_armV5b_(resized).png

Part is available for download on Thingaverse
http://www.thingiverse.com/thing:1316469

You will need to use 3/32 inch diameter 1/8 inch length brass hollow rivets with this which can be found on ebay.

Let me know if you use it, but remember there is no going back you will destroy the old arm removing the rivets.

I was originally going to do this, but do to the limitation of my printer not being able to print lines finer than 0.4mm it gave me issues with the separating line of plastic between the fingers, so I made it to just suit my machine, but I have provided the sketchup files on Thingeaverse so it can be easily adjusted for other machines