Is there the possibility to connect an small stepper motor (just for tool change)?
As long it's 4 wire bipolar I don't see why not. But also, if you want to make a servo to rotate the hotend or you need a third motor then you will need to find how since the board only has 1 extra stepper for the second extruder.
Tank you, found it. That's the point, the extra motor will be used for the second extruder, so I need to find a way for an third (extra extra) stepper motor. Is there any way to get a signal from any unused pins or connectors? I can connect the small stepper by using extra electronics, but is there something on the mainboard which i could use to get a signal to the extra electronics?
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neotko 1,417
Where to connect a second stepper/temp-sensor/heater for dual extrusion?
Is there an official firmware which supports dual extrusion?
On the board you have the second heater/pt100/extruder. Read the pdf of the board googling 'github ultimaker 2'
Official firmware no. I think tinkergnome firmware or just editing your own Marlin it's the way to go.
Is there really a problem with the power supply? I read that you get trouble when using two 35W heaters, but two 25W are fine. What is the Ultimaker standard? 25W?
Um2 non plus used 25W so in a future a second 25W could be added. Um2+ uses 35w since they officially said that there won't be dual from them on um2 (but there are a few mods that are in progress https://ultimaker.com/en/community/21676-dual-nozzle-ultimaker-2?page=last#reply-150491 ). For my dual tests on umo+ (same board) I used a meanwell 280W power supply since umo+ uses by default 40W heaters.
Is there the possibility to connect an small stepper motor (just for tool change)?
As long it's 4 wire bipolar I don't see why not. But also, if you want to make a servo to rotate the hotend or you need a third motor then you will need to find how since the board only has 1 extra stepper for the second extruder.
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