I'm pretty sure this is just a spacing issue. With your DSLR, the backfocus is probably 55mm. That means that from the front of the camera where a lens would attach to the actual CCD sensor the light travels 55mm. Your SXV H9 however only has 17.5mm from the front of the camera to the CCD sensor, a difference of -37.5mm.
It sounds like your focuser is not able to make up the for the difference. So you need to ADD 37.5mm in order to focus the SXV at the same spot as you would focus the DSLR. It wouldn't have to be exactly 37.5mm, but it does need to be enough to allow your focuser to travel out far enough for the camera to reach focus.
I hope others will confirm this because I do not image with a DSLR or Newt.