After using the printers do you think the dual head is worth the extra money? I have been eyeing both the monoprice single and dual head. This will be my first printer. But I don't want to buy the single head if in 3 months I will want to grow to the dual head
I completely agree with what the other person said. My MakerBot 2X was a dual head as is my F306. I'm not a fan at this point. While it's nice to have the two color possibilities there's some inherent issues that aren't being talked about and should be.
1) They're a son of a @#%@ to level. Even using measuring tools with the accuracy to go 3 decimal places in on mm it's imperfect and one head will usually drag over what the other one lays down... in many cases pulling it up.
2) Because of the dragging problem cleaning the tips to make sure there's no dried on plastic from the previous print becomes a necessity. Sounds easy, but it's really annoying to keep up with and you will forget resulting in bad prints and wasted plastic.
3) ... and probably the most annoying, is that different types of plastics with different melting temps do not bond well. So using things like flex with ABS or PLA are a great concept, but don't work nearly well enough. The only thing I've found to be an advantage is things like the dissolvable supports, and that's only when you're building on top of it. If the print depends on the support to stick to anything other than the printbed and other plastic to be laid down on top of it, then it's a roll of the dice whether or not it'll stick right.
4) You'll also get bleed-over colors. So everything ends up having bits and pieces of the other color mixed in. Marlin is written so that if a head is at melting temp it will very slowly ooze a little filament to keep it from burning and clogging. While that's normally not a problem, with a dual head it becomes an issue as you're printing in different colors (let's say white and black filament) you end up with a pepper look as one side catches the oozing drips from the second head. I know things like Simplify3D offer what's called an ooze shield, but to be honest they don't work well in my experience.
Most printers are optimal using one head and swapping between filament, but most people that own printers want to put two (or more) heads on them... before they have two (or more).