VC4 400 IDEX Resonances on T1

Hello!

I've been tuning my belts for about 3 days already.
I tried a multitude of different tension-ratios on x and y, but I just can't get my T1 Y to look any good.

I guess there's something wrong on my Dual_Carriage_X_Axis belt path or on my T1.

Could anyone take a look at my graph, and see if there's something obvious there that I can't see?

If more graphs of different tension-ratios would help, I could upload those as well.

Thanks!:)

tillibilli5671OP•2/26/25, 2:14 PM

Alright, I tested a few more things and came to a point at which I'll stop to keep my Sanity haha

I've documented the method that worked in the end for me, and hope it might help anyone:

Final Method:

Relax all Belts
Move Gantry to the back and make sure it is square
Home Printer → Idex Mirror
Tune X-Belts to 120-125Hz/40-43N
Measure protrusion from pulleys. If not the same, shorten one belt. 1T=1mm
Tune X-Belts again
Tune Y-Belts to 105-110Hz/33-37N
Measure Pulley protrusion and adjust belt length that they are the same, 1T=0.5mm
Tune Y-Belts again to 105-110Hz/33-37N
Run X-Graph, make sure it’s both MZV, otherwise adjust Frequency and try again
As soon as you reach MZV on both X-Axes, move on to the Y-Graphs. Try a few different Tensions, always the same tension on both belts.

Freq-Measuring Points for X-Belts: Between XY-Joiner and Tensioner Pulley in Home → Idex Mirror Position

Freq-Measuring Points for Y-Belts: Between XY-Joiner and Tensioner Pulley in Home → Idex Mirror Position

Special thanks to @tg73 for compiling the spreadsheet (hope it's ok that I upload it here, for completeness sake), this helped me immensely!!

RatRig_V-Core_4.0_Belt_Tensions_-_tg73_-_v2_Feb_2025_1.pdf59.65KB