This little video shows, the entire project and the steps written below. Se the steps for further detail. The entire pinball machine was done in app. 100 hours and cost less than 100$.
1. Plan and draw the table layout on a paper (app. 30x60 cm)
2. Draw the side pieces according to your liking - make sure the table tilts app. 5-7°
3. Cut out the base table and the side pieces from 12 mm plywood
4. Cut out all the bumpers, flippers and other elements from your 1:1 layout drawing to make your cutting templates
5. Cut out the layout elements form 18 mm plywood with at jigsaw
6. If you like some elements to be "bumpy", your have to drill 6 mm holes in them from the side to attach rubber band. The bands are fixed from the top with screws.
7. Fix all the table elements with screws (it is advisable to cut large elements into smaller segments - in case you have to make minor adjustments for better playability)
8. The flippers are fixed to some brass tubes (5 mm) with small screws. You have to drill some 2 mm holes in advance to prevent the plywood from breaking.
9. The same applies for the flipper mechanics underneath the table
10. Remember to use washers between the flippers and the table and underneath as well to ensure easy going mechanics
11. The mechanics works as shown in the video. If you don't have "Mechano" beams, you could make them from a paddle paint or similar (remember washers)
12. the plunger is made from a spring and a 6 mm beech stick. I made the handle and the plunger from a piece of 12mm beech stik with a 6 mm hole. I is attached with glue. The plunger has a small piece of neoprene stuck to it for padding
13. If you want ramps on your table, you can either make it from 18 mm plywood or from welding beams.