Warp prevention...

[ISKI]

Suspension Analyzer or equivalent is the ticket. I wish I had purchased a program as it would saved me a lot of time.

[wellis77]

I'm definitely not purchasing it, I'm using the free trial download. I think it's only good for two days so I need to have my junk together before I go to town on my junk.

[ISKI]

Setup a second machine, have a freind download it again, and when you boot up each day, reset the calendar before you run the application Maybe you could set the machine to 1901. Good luck with the design.

[wellis77]

Does that work? Huh.

[tigqk]

Getting back to your chipping hammer, if you smack the welds wile hot it releives the tension on the weld, does nothing for the appearance though,it is more prevalent and obvious when you are welding sheetmetal - hammer forging, weld an inch, on dolly the weld, the weld disappears and removes stresses, do it again until finished - how I was taught anyhow.
As for releiving your stress on the table, plan your spotwelds and if you can place three in one side try to put three on the other side of things, and pay attention to technique, bevel where you need to to keep yourself from overwelding and do it quickly to keep the heat down.

[mdkrusemark]

If you havent built the chassis table yet I would seriously look around for a used frame straightening jig from an autobody shop. They are old technology now but are made of I-beams with large casters and machined top surface on the I-beams. They are around 3 ft wide. If you find the right one they even come with pinchweld clamps distance measures, etc. The shop I worked at had one. They go for scrap metal price.

[wellis77]

Already built, done and done! I looked for some old frame tables but had no luck. I haven't had a chance to put any pics of my work up here yet but I'll do that shortly.