Heart Shaped Box Cam
Heart Shaped Box Cam
(OP)
Hi all, I'm trying to use a box design heart shaped cam to obtain a uniform velocity profile in traversing motion (see attachment) the problem is the cam jams in the dip, i've tried making other versions of the cam without the dip but then it just gets stuck in the new section.
The material is laser cutter acrylic (ok maybe not brilliant for friction but its convenient!)
The material is laser cutter acrylic (ok maybe not brilliant for friction but its convenient!)





RE: Heart Shaped Box Cam
RE: Heart Shaped Box Cam
To resolve it, you need to make the base circle bigger, i.e. move the dip farther away from the center. That may in turn force you to use a larger blank or a smaller stroke.
Mike Halloran
Pembroke Pines, FL, USA
RE: Heart Shaped Box Cam
the slot is 3mm wide and the inside of it varies from 5mm from the centre of the cam to 45mm. The follower is just a bar with a pin in the slot (clearance fit). The bar is also constrained to move in one place as it passes through a slot.
MikeHalloran:
this looks like good advice, moving the slot outwards by 5mm makes a lot of difference! Thanks
RE: Heart Shaped Box Cam
RE: Heart Shaped Box Cam