Hi guys,
Even I have been thinking about something like this . And I think using something like a solenoid or electromagnet would be more simple than using a motor for the nozzle lif ting mechanism .
And if the nozzle height difernce is 3mm , I think that is sufficient enough not to have a cover for the nozzle.
And using a solenoid type actuator we can use spring return type mechanism . that is, when the solenoid is energised the nozzle comes down . De energise it and the spring will pull it back.
What I am thinking is whether I should put the solenoid for both the print cores or just one . Putting it fir both would be like making it more symmetrical , putting it fir only one is like making it more simpler (?) And cheaper .
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MTG 8
Hi DidierKlein,
thank you for your feedback.
Atm, the nozzle is lifted 3mm and the nozzle cover has a thickness of 2mm, so there is an offset of 1mm.
I did also think of the extra weight of the stepper, even if it's just a small NEMA 8, it will probalbly decrease the maximum accelleration. You might tbe right with the mechanical solution be the better one, it would require less components, modding and also cost less than with stepper+electronics..
The lifting of the nozzles and the turning of the nozzle cover is already one mechanism, it requires just one shaft turned to do both of these actions, so one lever for that will work for that.
A retraction is needed in any way, the cover should just prevent the small amount of material coming out after the retraction.
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