I am still getting chatter on the diagonial strokes of pvc letters. I have read the posts regarding chatter. The chatter also shows up on O's, but not as much. The chatter is on the diagonial strokes like the letters K,M,M,R,V and W. I run at .5 ips, 13k rpm (3/4" pvc). Height of the letter doesn't seem to make any difference.
Some of the ramp settings are as follows:
X-Y MRS .1 / MRR .2 / MDC .3 / SCS 40.
The bit i use is an Onrud 52-282B. I realize it is an hdu bit, however i get the detail i want and the rest of the letter is smooth (just issues with the diagonial strokes and some O's). The diagonial stroke chatter is more pronounced than the chatter on the O's.
Has anyone else cut pvc letters and had this chatter issue? How did you resolve the problem?
Thank You, Roy