How fast does she go?
I usually print at 60mm/s which is 3600mm/s in my slicer settings (Simplify3D). Prints come out great.
Last night I had a print to do, set it up for printing at 40mm/s because I wanted some "extra" quality. This was a small part at .1 layer.
Anyway, a few minutes into the print, I realized it was going to take 6 hours and I wanted it finished quicker (I was tired) so I turned up the speed to 150 on the LCD. That should mean that the speed would be 60mm/s which is my standard. (if I am wrong correct me please)
Then I fell asleep (lol). The print came out fine.
This morning I printed a new part. I had used a model that was sliced in Simplify3D with a "fast" setting of 80mm/s. I forgot that I had the printer at 150 speed, so I assume this effectively this printed out at 120mm/s
The part came out fine, not perfect but fine a few zits, nothing terrible. If this were a model I was displaying, I might have a slight concern, but overall it's darn good.
So I did a new test, I printed a model that needs specific tolerance and straight lines (it's two parts on the bed) at 40 @100% on LCD and then at 80 @150 % on LCD. This test replicates what I did but with the same model for side by side comparison. They are nearly identical. If you were to ask someone who didn't know anything about 3D printing they probably couldn't tell the difference.
So, I have a few questions:
1. Does the faster speed hurt anything?
2. Is the printer really going at 120mm/s or am I not understanding something?
I ask because I am new to this and I read a lot about how printers are hamstrung by speeds and almost everyone seems to print at 40 or 60. These parts I printed (which I assume are 120) are just fantastic, there is no need for me to go any slower for what I am making. If I want to print a yoda or something.. I'll go slow, but unless there is a detriment to fast printing, this seems like the ticket for me. (unless I might damage something?)
Re: How fast does she go?
Eric
I have printed up to 180mm/sec, but for that you need to use higher temperatures and change a few settings.
When set to 120mm/sec, that is the maximum speed which, depending on the model is unlikely to be reached, mainly due to acceleration.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: How fast does she go?
Thanks Peter. 😀 Was hoping I wasn't going to "break" anything.
I think I will do some more testing, I am a bit impatient. 😈
When you say "When set to 120mm/sec, that is the maximum speed which, depending on the model is unlikely to be reached, mainly due to acceleration." I assume that means 120 is usually good to go, anything higher requires tinkering?
Re: How fast does she go?
I think I read a Youtuber went to 150mm/sec without modifications, but that was on the twitters.
and an 8 inch (200mm) or greater caliper is recommended.
Re: How fast does she go?
Eric
There are 3 settings which effect the actual maximum speed achieved when printing a model. The speed Jerk and acceleration.
The stepper motors only have limited power and both X and Y axes have a certain mass to move. When starting a print line the axis has to accelerate to the maximum speed and will only reach that maximum speed if the line has sufficient length to allow for acceleration and deceleration.
Models which don't have straight edges are sliced into many small straight lines with an angle between each line. The jerk value (default 10mm/sec for both X and Y) is the maximum speed change for both axes where deceleration/acceleration is not required between the two lines.
It is all quite complex, but the result is that when using higher speeds, it is very rare that you are printing at the set speed.
In order to really get to the higher speeds, both acceleration and jerk values need to be modified. The hardware in not the problem...
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: How fast does she go?
Great info, thank you, I now know where to start my learning 😀