board with built in accelerometer, mk4?
I have heared that Prusa is currently in the process of developing a board that will incorporate the accelerometer. However, they haven't provided information about whether this upgrade will be offered for free or if there will be a cost associated with it. I think it may cost beacuse Prusa may assert that the accelerometer is not essential for the printing process, similar to the hotend sock, which is not provided for free at the time of purchasing the printer.
What do you think?
RE: board with built in accelerometer, mk4?
where did you hear this?
RE: board with built in accelerometer, mk4?
A CoreXY like the XL would only need 1 accelerometer, but I'd think a bed slinger like the MK4 would need separate X and Y accelerometer.
If the rumor is true, I would think any upgrade though would be in whatever they call the next revision. MK4S? MK4+? MK4A? (for accelerometer)
I would also expect it to be a paid upgrade. All of us getting that full spool they intended to stop including are already cutting into their margins. just shipping an upgrade like that out of the goodness of their hearts would be bad business. If anything would be free, it would be the specs; sourcing info for the hardware (accelerometers are cheap and readily available) and printed parts can be downloaded.
When someone asks you if you're a god, you say, "YES!"
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Why couldn’t they provide it for free? BambuLabs sent all previous P1P customers a free camera and LED kit upgrade - they didn’t have to do that and it also ate into their profits even though they are a relatively new company, but they did regardless. Prusa could easily do the same. Personally I don’t think they will, it will be a paid for extra upgrade, but after all the delays and lack of decent communication it would certainly help redeem themselves in the eyes of many frustrated customers! Bad business when it comes to profits, yes, but not when it comes to customer satisfaction and creating a loyal customer base…..
A CoreXY like the XL would only need 1 accelerometer, but I'd think a bed slinger like the MK4 would need separate X and Y accelerometer.
If the rumor is true, I would think any upgrade though would be in whatever they call the next revision. MK4S? MK4+? MK4A? (for accelerometer)
I would also expect it to be a paid upgrade. All of us getting that full spool they intended to stop including are already cutting into their margins. just shipping an upgrade like that out of the goodness of their hearts would be bad business. If anything would be free, it would be the specs; sourcing info for the hardware (accelerometers are cheap and readily available) and printed parts can be downloaded.
RE: board with built in accelerometer, mk4?
They would either need to provide it free OR provide a way to enable input shaping without it (trial & error through test prints) since this was an advertised feature for the MK4.
Marlin 2 doesn't currently support accelerometers for input shaping, but perhaps that will change or Prusa will stack on custom code to get it working.
RE: board with built in accelerometer, mk4?
What are you dreaming about. Prusa is nothing else a company which needs to make money to survive.
There is a clear statement that the MK4 will have InputShaping. Which is already available as a SW-alpha and is doing very well for that.
You can measure the printer resonances with a test print and put it into the gcode to compensate for it. This is working. The resonance frequencies do not change rapidly. Maybe by degradation of the belt. But then you can do a recalibration after every 1000h of operation.
An accelerometer does only prevent this recalibration task. An accelerometer does not directly influence the print itself. For this you need a very accurate position measuring system (in x and y). Then your regulation sequence can directly go for the position.
Therefore: if Prusa will provide an accelerometer for x and y it will be an addon you can order and not a free upgrade. Because everything which was announced is available today. Quality and robustness will improve by SW and parameter optimization - but not by additional HW. The print quality @ high speed today is very close to Bambo (at least what's provided in youtube). Winning the print speed race was never a goal for Prusa. Quality and reliability first - and that's what you get today!
RE: board with built in accelerometer, mk4?
....Marlin 2 doesn't currently support accelerometers for input shaping, but perhaps that will change or Prusa will stack on custom code to get it working.
Prusa does not use Marlin at the input Shaper. Klipper code was integrated directly into the firmware.
The developers use the sensor to create the profiles.
I asked the support. For the time being, there will be no version with a sensor. Maybe later for experienced users.
RE: board with built in accelerometer, mk4?
You don't HAVE to offer anything for free. What a nonsense.
They would either need to provide it free OR provide a way to enable input shaping without it (trial & error through test prints) since this was an advertised feature for the MK4.
Marlin 2 doesn't currently support accelerometers for input shaping, but perhaps that will change or Prusa will stack on custom code to get it working.
RE: board with built in accelerometer, mk4?
Please re-read my post. I said they have to offer it for free OR (key word here) offer a way to configure input shaping without the accelerometer. You can't advertise a feature on a product and then not have a way for users to practically utilize it. The current "one config to rule them all" isn't going to work when there are so many different situations people can be using input shaping in.
RE: board with built in accelerometer, mk4?
However, it works as it seems. I have not heard from anyone that it does not work. Prusa can charge what they want. Why should you offer an accelerometer when it is not necessary on the Mk4. And if you do need one, those sensors cost an apple and an egg. Cent stuff.
RE: board with built in accelerometer, mk4?
This issue exists, and there have been people posting on the r/prusa3d subreddit as well reporting the same or similar issues. When you have people printing parts that are lighter, putting their printer on tables that might not be 100% rock solid, or other situations that won't exactly mimic whatever calibration conditions Prusa used, these problems can arise.
Sure Prusa can do whatever they want, they don't have to do anything I, or anyone else says. But if they want to do the right thing, they would offer manual tuning (either via accelerometer or other means), and I have confidence they will, and never implied otherwise.
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Yes yes as you mean. In my eyes, what you write is nonsense. Point. ^^
RE: board with built in accelerometer, mk4?
Prusa are not the only ones who deliver klipper input shaper with finished profiles. It seems to work.
I recommend reading the klipper documentation on compensating for resonance. There the possibility of determining the resonances with a test print is described.
Here i have provided a gcode for it. try it and you can see over what wide range the compensation works.
RE: board with built in accelerometer, mk4?
Good to know, I was curious about that. Hopefully they implement an easier way to tune on the lcd
RE: board with built in accelerometer, mk4?
Prusa only needs to make it work for one situation: Base stock system, on a stable platform. That's all they need to do in order to satisfy their advertised feature. And speaking as someone who's been printing with IS for weeks, they've done a fantastic job. It's really excellent and just plain works.