How many head bangs are normal at the beginning of a CORE One print?
At the beginning of each print, the CORE One bangs the head loudly agains the ends, while homing X and Y.
1. How many bangs are considered to be normal?
2. Is 50+ normal?
RE: How many head bangs are normal at the beginning of a CORE One print?
Mine does 4 to 6 bangs. It used to be more but I adjusted the belt tension and the helped a lot.
RE: How many head bangs are normal at the beginning of a CORE One print?
I didn't update the firmware to the fresh new one, but my Core One always does 2x4 = 8 bangs in the front right corner.
If it does more, then your Core One has one of these issues:
- mechanical issue: Pulleys installed incorrectly, belts not tensioned correctly, gantry not square (and mayn more, but these are the most common).
- load cell is pre-stressed due to the hotend cables being strained or the thumbscrews being too tight.
- hotend heating is causing wild loadcell values and using M104 S0 before all G28 or G29 commands in the Start G-code can help a lot.
Please test this:
- No pre-heating, not starting a print!
- LCD Panel -> Control -> Auto Home
If that Auto Home with a cold hotend is working fine, than I would recommend to search for the M104 S0 G-code modification.
If Auto Home without heat doesn't work either, it's probably a mechanical issue or constant stress on the load cell.
RE:
@Raaz, when I home manually cold, I get to bangs on X, two on Y, and then about 6 small diagonal moves with a bang on each end. Is this normal or should be fixed?
Looking at the idle reading of the loadcell, it's about 14,660. Is this normal?
(I didn't know that the loadcell is involved with x/y homing, I assume it's done using the Trimac drivers. That's how my Voron 2.4 worked and it had only two bangs, one for x and one for y.).
RE: How many head bangs are normal at the beginning of a CORE One print?
mine was doing 4x2 with belts at 85x85hz
Now with the new procedure of 98X92hz, the new normal is 5x2 bangs.
Annoying.
RE: How many head bangs are normal at the beginning of a CORE One print?
I am not familiar with the 98X92hz. Can you point me to the instructions?
RE: How many head bangs are normal at the beginning of a CORE One print?
RE: How many head bangs are normal at the beginning of a CORE One print?
Thanks!
RE: How many head bangs are normal at the beginning of a CORE One print?
@Raaz, when I home manually cold, I get to bangs on X, two on Y, and then about 6 small diagonal moves with a bang on each end. Is this normal or should be fixed?
Looking at the idle reading of the loadcell, it's about 14,660. Is this normal?
(I didn't know that the loadcell is involved with x/y homing, I assume it's done using the Trimac drivers. That's how my Voron 2.4 worked and it had only two bangs, one for x and one for y.).
It is done by the motors and not via the loadcell, but heating definitely causes issues for me. Maybe the loadcell is an additional check to confirm a successful bang.
I'm not sure about the loadcell idle values, but from my memory, 14k is pretty high and might indicate some constant tension that should be resolved.
I'll check my loadcell values in a few hours!
RE: How many head bangs are normal at the beginning of a CORE One print?
a little update on this, as I brought it up to support.
They said to not use the belt tuner NEW recommendations as this have been prematurely uploaded and they are not final. The recommendation is to follow the app recommendations which are 85 x 85 hz. The app DATUNER can also be used to tune the belts. I tried it, it gives a good real time reading. The prusa app does not but it matches Datuner reading.
I swtiched back to 85 x 85.
A quick note, and this is merely spitballing, I noticed that if I sent a gcode generated with an older 'calibration' say someting I already had in the card before my most recent calibratuon, for example when the belts were at 95x92, the headbanging is then increased to maybe 8x2. If I send the same model, generated with fresh gcode and current calibration, then the machine follows the most recent -to my knowledge- head banging wich is 4x2. as said, this is 100% spitballing and not sure if this correlates to the when the g code was generated. Please someone with proper Gcode knowledge if they could explain this behaviour if at all connected with how the machine handles XY calibration to compare to what stored vs to what is current vs Gcode.
RE: How many head bangs are normal at the beginning of a CORE One print?
your gcode is generated by your slicer and the slicer knows nothing about the calibration of your printer, so I do not think there is any correlation between the two.
RE: How many head bangs are normal at the beginning of a CORE One print?
I thought so too, I do however find that the headbanging is somewhat affected by this. I cant explain why its more or less when I change this.
RE: How many head bangs are normal at the beginning of a CORE One print?
If you use the same model and the same settings, then there should be no difference, logically.
RE: How many head bangs are normal at the beginning of a CORE One print?
I updated to the latest firmware. Printed one model 3 times now using the new firmware. I notice the head banging has completely stopped. Does the default 2 head bang test and that's it......
RE: How many head bangs are normal at the beginning of a CORE One print?
The app DATUNER can also be used to tune the belts. I tried it, it gives a good real time reading. The prusa app does not but it matches Datuner reading.
On iPhone I had good success with Pano Tuner. Its shows tens of hertz and it's obvious when it had a new reading (as opposed to the Prusa app).
RE: How many head bangs are normal at the beginning of a CORE One print?
As mentioned in another thread recently, changing the G28 in the startup gcode to G28 I (adding a capital letter 'eye' argument) reduces the number of bangs to 2x2.
RE: How many head bangs are normal at the beginning of a CORE One print?
ist that with the 4 or 5 version ?
I updated to the latest firmware. Printed one model 3 times now using the new firmware. I notice the head banging has completely stopped. Does the default 2 head bang test and that's it......
RE: How many head bangs are normal at the beginning of a CORE One print?
Firmware 6.3.4
Have don more prints since, and my headbanging is constantly down to 2 or 3 bangs per corner and thats it, which is the behaviour I'd expect. I haven't touched my belts etc at all. All Ive done is update firmware.
ist that with the 4 or 5 version ?
I updated to the latest firmware. Printed one model 3 times now using the new firmware. I notice the head banging has completely stopped. Does the default 2 head bang test and that's it......
RE: How many head bangs are normal at the beginning of a CORE One print?
I logged today 286 head bangs from a single G28 homing command.