Homebrew Pinball #3, Part 5

Cross posted from the original Pinside thread, this is one of many posts regarding my third homebrew pinball machine, creatively nicknamed 'P3'

Got the ramp fully mounted, and found my first major design issue. My model for the ramp was way off. In retrospect I should have printed it out 1 to 1 on a piece of regular printer paper to test first before getting it printed on the big sheet. Luckily it seems like the existing placement will still work, it's just that where I was planning on putting two targets on the upper left, I can now only fit one, since the ramp mounting hole overlaps that slot, and you can't really take the ramp off while the upper left flipper is installed. Will also need to adjust the habitrail design somehow to match the new placement.

Installed the side rails and the spinner and inlane guides.
At this point I now had enough worked out to technically test some of the main shots and see how they felt, but for that I'd need to get it in the cabinet. I'm using an old whirlwind cabinet I bought from a restorer a few years ago. It came with the side rails, lockdown bar, etc, but no playfield mounting hardware. That's probably good anyway though, since I hate the hinge on system 11s. For now, to make playfield removal easy (since I'll be doing that a lot!) I'm just going to go oldschool and put some wood bars down to rest the playfield on. I got some really big C clamps from harbor freight and used them to attempt to level the bars. This was a bit of a pain since I need them to also match the playfield hanging from the lockdown bar at the front. I ended up installing some permanent back panel support legs, and using that to set the playfield in the cabinet upside down, then reaching in through the speaker hole to mark the height.

Installed the transformer panel, taken from a mystery 80s gottlieb, and luckily it has clearance from the playfield
Did some initial power wiring to get the transformer the 110v it needs to generate the 25v I need
The lightswitch kills the power going to the transformer so I can turn off the high voltage to safely work on the machine without shutting the whole thing off. One outlet will be to power the ATX computer power supply I'll be using for the logic voltages and is controlled via the power switch, the other is an always on service outlet.

Posted Thursday, September 10, 2020
at 05:52 PM

Tags: Blog Post, Pinball, Project, P3,

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