Mosfet Upgade

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Lez0
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Mosfet Upgade

Post by Lez0 » November 27th, 2018, 4:28 am

Hi all
If this is the wrong section, please let me know.
I bought a Mosfet
I have wired it up, I think correctly as it seems very simple, I set the temp of the bed to say 60°C and nothing happens, it does not get hot.
I am not an electrician so I am limited to what I can do.
I have checked the voltage that goes into the Mosfet and it's 12v, so that bit is OK.
The output is zero.
I have tried switching around the wires that come from the MKS board but that make no difference.
I think the Mosfet is not working.
I took out the Mosfet and I re-connected the old wiring and it works OK.
The reason I wanted to upgrade is because I sometimes get Themal runway error, reset when heating the bed.
Any advice would be useful.
Thanks
Lez
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Last edited by Lez0 on November 27th, 2018, 4:34 am, edited 1 time in total.

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Roberts_Clif
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Re: Mosfet Upgade

Post by Roberts_Clif » November 27th, 2018, 7:58 am

They are easy to install for someone that has worked on electronics.

Though they can be a little confusing.
Try reading this
https://3dprint.wiki/reprap/electronics/heatbed_mosfet
Electronics Technician / Computer Programmer

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LePaul
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Re: Mosfet Upgade

Post by LePaul » November 27th, 2018, 1:41 pm

I referred to Fugatech's video when installing mine on the FT-5 a while ago This may help


Lez0
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Re: Mosfet Upgade

Post by Lez0 » November 28th, 2018, 4:33 am

Thanks for the rely.
I looked at the link and also watched the video. It appears I did wire the Mosfet up correctly!
So it must be faulty.
Paul, on a side note, it only takes a few minutes to get my bed to 60°C whereas in the video it was taking around 15 min for a stock Folger FT5.
I may have a later version than Fugatech. The only change I made with mine was it did not come with a thermister for the bed so I bought one.

Again thanks

Lez

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LePaul
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Re: Mosfet Upgade

Post by LePaul » November 29th, 2018, 10:22 am

I agree, mine doesn't take a long time heat up...no longer than my Ultimaker 2+ or even my CR-10S (my Tevo Tornado has an AC bed so that's super quick).

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