24v power supply

K8200 3D Printer K8200 - Wiring and electronics
1

Hi, right I am now ready to either blow the printer up or have a hotter hotbed, I have my 24v 100 watt power supply, I also have a power stepper, plus the instructions from a previous post, so i connect the 24v power supply to the stepper, adjust the power outage down to 15v and then connect to the printer circuit board the same way as normal. have i just fried my printer or am I OK?, thanks for all your help, i am sorry I no nothing about electrics circuits or anything of this nature

2

Now you have only powered the K8200 with 15vdc, and not the heatbed with 24vdc

3

hi, i thought that was what i had to do, according to the instructions, Installing a 24v power supply for heated bed, it shows how to build a power extender, just i bought power extender instead of making one, so what do i have to do then?, it then states, to use the the temperature of the heated bed you need to insert a power extender between the heatbed output (don’t know where that is) of the controller board and the bed?

4

Just have a look at the Wiki. You can also check the same topic for the Vertex where you’ll get a more detailed explanation on how the wiring goes.

5

What you may fry is your power supply as I would have thought you were in danger of overloading it if you supply 15v and wire it up to the bed as if it was 12v and your supply is only rated at 100 watts

I don’t know which board you have got but if it is a reprap then from the resistances given at their wiki site reprap.org/wiki/PCB_Heatbed then if it is Mk2 supplying 15v to the 12v configuration will require 204 watts and if it is Mk3 then 150 watts.

I would have thought 100 watts will take a very long time to heat the bed and it will struggle to raise the temperature sufficiently high for printing ABS

6

24V 100w is enough to heat the stock bed of the K8200. I would use another 100W PSU to feed the printer.

7

Hi, thank you for the replies, I did intend using it for the hotbed only, so I will attach it according to the Vertex instructions, again thank you

8

Hi thanks for all the help, I have wired the power supply to the power extender, I am not sure where to connect the cables from the power extender to the printer circuit board, my extender only has one output and one input and I cannot see any other pins to connect to, sorry for being so stupid.
Pictures of power extender: s923.photobucket.com/user/deafol … sort=3&o=0
Thank you for your time and patience

9

Your board doesn’t look like a power extender, more like a voltage converter.
Don’t you have the specs?

10

Hi, oops yes it is, a power converter, banggood.com/8A-24V-TO-12V-S … 27773.html
which they no longer have or sell

11

Hi, have now purchased correct thing so will try again when it arrives, thank you