Speed of MM printing?  

Re: Speed of MM printing?

Since I don't have my MM setup yet, can anyone describe how much extra time is involved with each color or material change during print?

Totally depends on the model. Some prints are only 10% longer, some are 200% longer...

Peter

Re: Speed of MM printing?

Since I don't have my MM setup yet, can anyone describe how much extra time is involved with each color or material change during print?

Thanks!

I would say, small prints with lots of color changes (or small in X and Y and pretty high in Z axis) will take 2,3 maybe even 4 times longer.
Really large prints (in the X and Y axis) won't take that much longer since the color changes takes the same time with smaller prints and therefor the printer is putting more time in printing the model in stead of the waste tower.

Re: Speed of MM printing?

How much time does it take to change from filament A to filament B each time there is a change? 1 second? 10 seconds? Just trying to get a handle on the switch time.

Re: Speed of MM printing?

How much time does it take to change from filament A to filament B each time there is a change? 1 second? 10 seconds? Just trying to get a handle on the switch time.

Off the top of my head I would say about 30 seconds. It has to extrude in the order of 70mm of filament during tool change, plus cooling time. Then there are the "empty wipes" where a tool change is not required on the current layer but changes happen higher up.

Peter

Re: Speed of MM printing?

Prusa's original slic3r settings for the normal MK2 are 40 mm/s for perimeters. I am using 60mm/s as a standard value, as this has nearly no influence on the quality (depending on the part design!)
Is this the same for the MM upgrade or will I really see only 40mm/s speed.

I know this has to do with a lot of factors (partdesign, temperature, filament type, ...), but the 60 mm/s speedup I talk about had really nearly no influence. I also tried 80 but that began to make poor corners and stuff like that, that I didn't want to finetune for.

Re: Speed of MM printing?

Prusa's original slic3r settings for the normal MK2 are 40 mm/s for perimeters. I am using 60mm/s as a standard value, as this has nearly no influence on the quality (depending on the part design!)
Is this the same for the MM upgrade or will I really see only 40mm/s speed.

I know this has to do with a lot of factors (partdesign, temperature, filament type, ...), but the 60 mm/s speedup I talk about had really nearly no influence. I also tried 80 but that began to make poor corners and stuff like that, that I didn't want to finetune for.

As long as you are sensible and don't expect the impossible, then your print speeds won't change. Probably the biggest limitation is the temperature - you cannot expect clean higher temperature unloads - so if you don't need to use higher temps for higher speeds, then you will be OK.

Peter