MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Hi Schlotzz. Thanks for your reply. At the end I found out the "slipping" was due to my Delta DIY kit has not been calibrated (ha ha.. because I was a "CAN" Up! Plus printer user.). Now I calibrated the thermistor and adjusted the POT on A4988, and the machine is working quite stable now.
The "tension spring" that I mentioned in the last post is something similar to below linked image:
I thought the spring can press the filament constantly, but indeed the plastic body of your design already achieve the same as it can be blended slightly as always.