21
Radio Control Models / Re: 1/16 scale Terramac RT7R
« Last post by ddmckee54 on November 19, 2025, 12:21:34 AM »The outdoor projects are almost wrapped up, at least on the exterior. The porch roof has been replaced, and that project is weather-tight. With the exception of the overhead door the exterior of the garage is complete, and the door should be installed by the end of the week. Completing the interior of both the garage and porch will be my winter projects.
I got a little work done on the RT7R, mainly cleaning leftover support material from the drive sprockets, idlers, and all the track rollers. I 3D printed three split collets, one for the 2 drive sprockets, one for the 2 idlers, and one for the 16 track rollers. The split collets allowed me to chuck the parts in the 3 jaw on my Sherline and clean off all the external support remains.
I still have to clean out the supports in the bearing bores on all the track rollers, idlers, and sprockets. That procedure will require a different set-up, but will re-use the split collets. The current plan is to chuck an end-mill in the tailstock and use the end-mill to clean the bearing bore to the proper depth.
I've been having issues with my 3D printer, my spool of grey filament was poorly wound, and it measures undersize. I finally got through the area of the spool that was badly wound, that caused several failed prints. Two of those were failed prints damaged the teflon liner in the hot end. I thought I caught it early enough the last time, but I was mistaken. When I took the hot-end apart the liner was sticky and starting to turn black. Maybe it's time to switch to an all metal hot end?
I got a little work done on the RT7R, mainly cleaning leftover support material from the drive sprockets, idlers, and all the track rollers. I 3D printed three split collets, one for the 2 drive sprockets, one for the 2 idlers, and one for the 16 track rollers. The split collets allowed me to chuck the parts in the 3 jaw on my Sherline and clean off all the external support remains.
I still have to clean out the supports in the bearing bores on all the track rollers, idlers, and sprockets. That procedure will require a different set-up, but will re-use the split collets. The current plan is to chuck an end-mill in the tailstock and use the end-mill to clean the bearing bore to the proper depth.
I've been having issues with my 3D printer, my spool of grey filament was poorly wound, and it measures undersize. I finally got through the area of the spool that was badly wound, that caused several failed prints. Two of those were failed prints damaged the teflon liner in the hot end. I thought I caught it early enough the last time, but I was mistaken. When I took the hot-end apart the liner was sticky and starting to turn black. Maybe it's time to switch to an all metal hot end?
Recent Posts