SLM MGN12H vs LDO kit MGN9H XY-joints

Last time, I think it wasn't completely clear: the rail sizes here are for the Y-axis. The X-axis in both cases is MGN12H.

Test conditions:

• 300mm flying gantry
• 4040/2040 frame
• 3mm aluminum structural side panels
• 2020 Y-extrusions with 2mm stainless backers
• Double SLM Z-joints
• LDO 2504 S45Rs @2.5A and 36V
• LDO CNC kit motor mounts
• EPDM 10mm belts @20lbs
• Custom lightweight X-rail, Z2 (or even higher) preload
• Carbonara with Ti hardware
• Experimental Monolith Toolhead
• Measured with Beacon at room temperature
• Accel/Hz = 125
• No sweeping
• Same XY joint hardware and motion, where possible

The only difference is the XY joints and Y rails.

(Both of the X-graphs are wider than I'd like, and I have some ideas why that is the case. It's best to dedicate a whole post to that investigation.)

As I emphasized earlier, the overall moving masses between these two configurations are almost identical, which is backed up by the very similar graphs.