I have a MPCNC build with a Eric TimSav needle cutter converted by David. I cannot seem to get more than one sheet cut without breaking the needle or melting the mounting screw out of the flywheel. I think I have fixed my issue with the flywheel melting by fabricating my own small washers that set on the inner bearing race. I will probably have to break down and buy those M3x5mmx0.3mm thick washers. The needle breaks about one inch from the mounting screw in the flywheel. I believe the stress is happening at the needle guide bearings slapping against them. The needle is sharp (dremel style). I have tried different needle holders out there (teardrop style) in hopes to solve the needle issues.
The main issue I have with the teardrop style needle holder is that I cannot get the .025" wire through the hole. I have tried heating up a pin to enlarge hole. How does one get the wire through on the needle type holder?
Can I remove the top set of bearing for the needle guide to eliminate the stress on the sire? Last, How can I eliminate the bearing mounting screw from melting out of the flywheel?
cutter settings:
6000-8000 rpm
600-800 mm/min feed rate
The main issue I have with the teardrop style needle holder is that I cannot get the .025" wire through the hole. I have tried heating up a pin to enlarge hole. How does one get the wire through on the needle type holder?
Can I remove the top set of bearing for the needle guide to eliminate the stress on the sire? Last, How can I eliminate the bearing mounting screw from melting out of the flywheel?
cutter settings:
6000-8000 rpm
600-800 mm/min feed rate
Attachments
-
23.4 KB Views: 1
-
2.4 MB Views: 0
-
2.4 MB Views: 0