VC4-400 Initial Core XY graph

Hey all. Starting the belt tension cal/tuning. How is this looking? Any suggestions welcomed.
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15 Replies
RyeRye
RyeRyeOP2mo ago
This is where I've ended
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RyeRye
RyeRyeOP2mo ago
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RyeRye
RyeRyeOP2mo ago
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KiemPlant
KiemPlant2mo ago
What did you change? Did you properly tension the belts, because it looks much better in the last one Mine looked similar to your initial one, cause was improperly tensioned belts and also a skewed gantry. A shaper calibration would be useful to do next I think.
RyeRye
RyeRyeOP2mo ago
Found that the clamps on the front of the toolhead were slipping. I didnt have enough belt in to start.
KiemPlant
KiemPlant2mo ago
Ah yes, that makes sense.
RyeRye
RyeRyeOP2mo ago
Then yeah tensioning much more than I initially anticipated.
KiemPlant
KiemPlant2mo ago
I'm not sure if you're familiar with tuning the belts by plucking them and checking the resonant frequency using the real-time analysis tool? But here's a reference that will help you with that: https://discord.com/channels/582187371529764864/1223286652949106748/1272625387871928494
KiemPlant
KiemPlant2mo ago
mine is a 500 so I tuned it to 85.4Hz
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KiemPlant
KiemPlant2mo ago
Not that your graphs are bad, but it helped me a lot with further problems.
RyeRye
RyeRyeOP2mo ago
Thanks, I haven't tried the pluck method. I think next is adding hybrid belts before I start any test prints. Also adding enclosure now that it has arrived.
KiemPlant
KiemPlant2mo ago
You could do that, yeah. Generally it's recommended to properly tune your belts in CoreXY configuration before adding hybrid. But then again you can simply loosen up the hybrid belts and do the CoreXY belts before tensioning the hybrid belts.
RyeRye
RyeRyeOP2mo ago
I'm just following the guide. These graphs are just coreXY belts. Next is adding hybrids.
KiemPlant
KiemPlant2mo ago
Hmm, I said that because the guide also says
Hybrid Belts
Tuning all belts from the ground up is a nearly impossible job, so Rat Rig recommends that you first tune your CoreXY belts and only then proceed to add and tune the Y belts.
Hybrid Belts
Tuning all belts from the ground up is a nearly impossible job, so Rat Rig recommends that you first tune your CoreXY belts and only then proceed to add and tune the Y belts.
And running shaper graphs before adding Hybrid basically allows you to spot issues like binding and such in time. I have no idea why they put that section before the input shaper section, as if you experience binding after already having added the hybrid belts it might be a pain in the butt to figure out what's actually causing it. But you'll probably be fine
samus129
samus1292mo ago
To go back and tune the XY after your going to need to unplug the hybrid You probably also got a little bit of skew in your gantry but not much sorry for the late reply For belts I went 1 tooth past the small indent so that when you push the grabber and it pulls the belt back a little it still has good grip
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