Some print start scripts may extrude at a position slightly higher than the first z layer height. Tweak the backwards z test to reduce the chance of the tuning test ending prematurely. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This adds a testing tool that can run a command on each Z layer of a print. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>