I need a pointer or two..............I received my SB Pro and good #44 bit from DD4H and drilled a car. The underside of the 5/16" thick car is hollowed out and was a really tight fit in the SB. I didn't have pin gauges at the time and I wanted to build some Bulldog fenders for it so I didn't verify the holes (Won't do that again). After I got the fenders built and attached I put it weighted on the test board and noticed that the rear tires were not migrating out going forward. They did migrate out when pulled back, and the car didn't stay straight when pulled back. After putting a square on it the 3 degree angles are correct but both axles lean toward the front of the car instead of being perpendicular with the body.
I drilled my son's solid body car (it was a snug fit) and the alignment checks out with the square, the wheels migrate out (although one is quicker and migrates farther than the other) both forwards and backwards on the board, however, it still does not track backwards in a straight line.
Since I screwed up the first hollow body car and couldn't redrill it with the SB as the fenders are attached I made a second car (plus it was a chance to play with a router bit in my drill press using the cross slide vice I recently purchased). After routing the body I put the car into the SB Pro and again it was a super tight fit. The 3 degree angles were good, the rear tires migrate outward (one faster than the other) in both directions, but it doesn't stay straight when pulled backwards. Using a square and pin gauges it looks like one side is leaning slightly forward toward the nose of the car.
How tight should the cars fit into the SB Pro? I wonder if the hollow body car is flexing when squeezed into the jig.
On the video 5Kids made using the square and thumb tack his car always stayed straight in reverse. What is causing my cars not to track straight going backwards?
What is causing the holes to have a forward (toward the nose) angle? Its not the SB Pro, maybe the drill bit is wandering? Any suggestions on correct drill technique?
I drilled my son's solid body car (it was a snug fit) and the alignment checks out with the square, the wheels migrate out (although one is quicker and migrates farther than the other) both forwards and backwards on the board, however, it still does not track backwards in a straight line.
Since I screwed up the first hollow body car and couldn't redrill it with the SB as the fenders are attached I made a second car (plus it was a chance to play with a router bit in my drill press using the cross slide vice I recently purchased). After routing the body I put the car into the SB Pro and again it was a super tight fit. The 3 degree angles were good, the rear tires migrate outward (one faster than the other) in both directions, but it doesn't stay straight when pulled backwards. Using a square and pin gauges it looks like one side is leaning slightly forward toward the nose of the car.
How tight should the cars fit into the SB Pro? I wonder if the hollow body car is flexing when squeezed into the jig.
On the video 5Kids made using the square and thumb tack his car always stayed straight in reverse. What is causing my cars not to track straight going backwards?
What is causing the holes to have a forward (toward the nose) angle? Its not the SB Pro, maybe the drill bit is wandering? Any suggestions on correct drill technique?
