Dreide wrote: ↑
Aug 13, 2018 5:15 pm
Yes, for X I use the upper part (after having pushed the motor all the way to the left), and I aim for 74Hz. Note that especially with high tension, the tension might depend on the Z position as the Z axes give in to the belt tension more easily at mid Z levels than close to MIN or MAX, but I actually never tested this systematically. Therefore, I suggest measuring X belt tension after Z homing, so when the X axis is close to the bed.
For Y it would be the lower part and I aim for 66Hz (motor position doesn't matter here).
It would be interesting to know what belt tension others use in terms of pluck frequencies under these measurement conditions.
Regarding Prusa's belt status values, I consider them useless. I think the values are even not consistent across firmware versions, and they have a poor resolution and accuracy. For actually adjusting the belt tension instead of just checking them, the frequency method is so much faster anyway - and kind of fun.
perfect, thanks a lot. excellent idea, maybe we can share our settings here. I made it X75 and Y65 after XYZ homing. It's quite hard to measure the exact value because of the loudness (or quieteness?) of the sound, microphone sensitivity (50Hz is a pretty low value), but a measured range 70-80Hz would be enough. A lot more enough than the tensioning is described in the building manual.
Values are pretty much useless, I agree. Now I have done full reset of EEPROM, reload firmware 3.3.1 and Belt Status says X274 Y315, which is nonsense. It shows same values when my belt played 110Hz or 50Hz.
for iOS I recommend SpectrumView https://itunes.apple.com/us/app/spectru ... 62922?mt=8
, alghough it's good to pay for pinch and zoom feature, it's needed for this. There are also other apps available, but I already own this, so I used.
thanks a lot. from now on all my prints will be amazing!