diff --git a/UrumbotXYZ/fixed_axis/README.md b/UrumbotXYZ/fixed_axis/README.md index e5becdacb509349d1ca35c8145f54a7e8af3e4bb..f3244b8f106ea739adf227e89cef0d747bd6e74b 100644 --- a/UrumbotXYZ/fixed_axis/README.md +++ b/UrumbotXYZ/fixed_axis/README.md @@ -44,7 +44,7 @@ PCB miiling: Set speed at 4 mm/s. As seen in the video, the tool is still pull <img src=./img/pcb.cmp.mp4 width=100%><br> -Here's the board result: +Here's the board result: The channels are much deeper than specified, ~ 0.2 - 0.5 mm. Some distortion in the trace shapes. <img src=./img/fixed_z_pcb.jpg width=40%> @@ -54,7 +54,7 @@ And wax milling: At 10? mm/s. The 1/8" single-flute endmill runs with some vib Wood milling result is better than moving-z configuration: -<img src=./img/fixed_z_mill_wood.cmp.mp4 width=100%><br> +<img src=./img/fixed_z_mill_wood.jpg width=100%><br> Loading work on the bed: This frame gives plenty of room to move bed back for tool changes and to move bed forward for access to the work. @@ -64,14 +64,15 @@ Loading work on the bed: This frame gives plenty of room to move bed back for t ### Conclusions -This configuration almost works, with dF/dz = 30 N/mm at spindle, and unknown but measurable stiffness in the rest of the mechanism. +This configuration almost works for both PCBs and wax, with dF/dz = 30 N/mm at spindle, and unknown but measurable stiffness in the rest of the mechanism. #### Successes - Separating the axes makes it easier to evaluate and improve stiffness of either. - Nice geometry for access to work. - - - - Almost works. Results from Cam machine indicate that we are close. + - Good to have strings underneath frame. + - Motors are all fixed to frame, and connections don't have to flex. + - Almost works. The nice results from the limited-z machine (with 2 mm cam action) on PCBs indicates that we are getting close to sufficiently good resolution and stiffness for PCBs, and the wax results are encouraging. - #### To be done. @@ -79,4 +80,4 @@ This configuration almost works, with dF/dz = 30 N/mm at spindle, and unknown bu - Stiffen up z-axis - Better string, two strings, belt, leadscrew. - Evaluate bearing design and improve if it makes sense to do so. - - Measure plate compliance (better word than stiffness?) and increase roller separation if it makes sense. + - Measure plate compliance (better word than stiffness?) and increase roller separation to stabilize if it makes sense.