Posted by Danny on July 16, 2019 at 11:13:59:
HI,
I HAVE BEEN HOBBING BOTH RH AND LH GEARS ON THIS MACHINE IN THE SAME WAY FOR NEARLY 2 YEARS BUT ALL OF A SUDDEN ON LH HELICALS i AM GETTING SHADOWS ON THE FLANKS OF THE TEETH AS IF THERE IS SOME KIND OF MOVEMENT ALLOWING THE HOB TO DIG IN THE SIDES OF THE TEETH DOWN THE FLANK. I HAVE TRIED ALTERING SET-UPS, COLLETS, DIFFERENT CENTRES, CHECKED ALL GEARS OVER AND OVER BUT IT STILL KEEPS DOING IT- ANYONE ANY IDEAS?