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Firmware 1.0.4-RC1 for the MMU2 unit  

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FaultyLine
(@faultyline)
Trusted Member
Re: Firmware 1.0.4-RC1 for the MMU2 unit

This is very interesting - thanks for all the info.

I was thinking about using a buck converter to step up the 12V to 24V for the MMU2, given the trinamic drivers prefer higher voltage and many of the issues we are all having is the 12V MK2.5. That's probably a bad idea, but it was just a thought...

I haven't tried the final version of 1.0.4-RC1, but am looking forward to attempting it over the weekend.

Posted : 22/02/2019 11:48 pm
Kabammi
(@kabammi)
Re: Firmware 1.0.4-RC1 for the MMU2 unit


This is very interesting - thanks for all the info.

I was thinking about using a buck converter to step up the 12V to 24V for the MMU2

a buck converter steps the voltage down, you'd need a boost converter to step the voltage up.
You'd just need to make sure your power supply can handle the necessary current draw at 24V (not just for itself, but while everything else is drawing power full-tilt as well). Other than that, there's no reason why it couldn't work.

Posted : 25/02/2019 2:20 am
FaultyLine
(@faultyline)
Trusted Member
Re: Firmware 1.0.4-RC1 for the MMU2 unit



This is very interesting - thanks for all the info.

I was thinking about using a buck converter to step up the 12V to 24V for the MMU2

a buck converter steps the voltage down, you'd need a boost converter to step the voltage up.
You'd just need to make sure your power supply can handle the necessary current draw at 24 V (not just for itself, but while everything else is drawing power full-tilt as well). Other than that, there's no reason why it couldn't work.

A boost converter - not a buck converter... That's what I meant! 🙄 Thanks for the correction!
I'm using a boost converter right now on the MMU2 and am currently feeding it from a separate PSU to monitor the current draw. I connected the Prusa and my bench PSU DC "ground" together and so far everything is working great. Most current from the 12 V side on the bench PSU is about 1.2 A - mostly idles around 0.45 A.

I'm really happy that the homing issue was fixed in 1.0.4 - that was such a source of frustration, until I realized it was bad firmware...

Posted : 25/02/2019 5:38 am
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