After a string of one problem after another with both classic jerk and junction deviation in Marlin, and coming to understand that the whole mathematical model for both of them is rather bogus (as I understand it, there's nothing to keep jerk from junctions of multiple tiny segments from accumulating to unbounded near-instantaneous chage in velocity), I kinda want to just disable jerk entirely (set it to zero). But of course this would give really slow printing.
What I'm wondering, though, is if it makes sense (and if so, how) to try to compute and use an acceleration value sufficiently high to achieve what jerk was trying to achieve, without it.
Mechanically, if a printer can handle a given jerk without skipping steps or harmful vibration, it should be able to handle acceleration high enough to achieve exactly the same stepping at corners/junctions. However, perhaps acceleration limits also involve current to the motors, heat dissipation at the motors/stepper drivers, or other factors that make "instantaneous" extreme acceleration okay but sustained extreme acceleration bad. (Of course, without extreme max speeds, extreme acceleration should only take place momentarily, in some sense proportional to as much a jerk takes effect.)
Am I crazy for thinking about doing this? If not, what would be a good model for determining the appropriate acceleration to try?