Custom size mk3 heatbed


#161

[quote=“Norx”]Numbers are different if the Total resistance is 1,5ohm.[/quote]Indeed but I measured mine and it’s 0.65 ohm…
I had to swap my home made power expander for a SSR because I didn’t check the resistance before connecting the bed and it blew one of the copper paths of the expander (acted like a fuse).


#162

Hi Marlark,

Would like to buy one of your heatbeds for the K8400 if there is any available.

How do I order?

Best regards
Goran


#163

Everything is in the first post : http://forum.velleman.eu/viewtopic.php?p=67409#p67409


#164

[quote=“raby”][quote=“Norx”]Numbers are different if the Total resistance is 1,5ohm.[/quote]Indeed but I measured mine and it’s 0.65 ohm…
I had to swap my home made power expander for a SSR because I didn’t check the resistance before connecting the bed and it blew one of the copper paths of the expander (acted like a fuse).[/quote]

Raby; checked mine today and got same numbers as you. 0.65ohm.


#165

I’m using a 500W PSU. It seems to be enough.


#166

Goran: All you need is in the first post in the thread like Raby wrote :slight_smile: i have about 80 left so if you need more then one hehe you have no problems.

The 15V setup require a beefy PSU if your replacing the existing one. Raby wish model do you use btw. most 500W once is quite beefy in size.

// Marlark


#167

I’m using a MeanWell SNT RSP-500-15. It fits easily under the printer.


#168

Look Nice. Got and issues with heat on the SSR?


#169

@Norx:
Sorry to hear that the information in my document is not accurate. But since I know nothing about electronics, I used information from this forum. Somewhere is written that 2 nozzles takes about 120W and the 12V heatbed needs another 100W. Is the remaining 100V not enough for the rest of the printer needs?
I don’t understand…


#170

@Marlak : the SSR is a 40A! No problem.

@svdv : The bed drains 220W at 12V and 345W at 15V.


#171

You mean if the bed is connected to the 12V pads, but the PSU is 15V, it takes still 345W?


#172

[quote=“svdv”]
You mean if the bed is connected to the 12V pads, but the PSU is 15V, it takes still 345W?[/quote]Yes, the higher the voltage the more power it will drain (but it will heat a lot quicker too).


#173

@Norx:
Sorry to hear that the information in my document is not accurate. But since I know nothing about electronics, I used information from this forum. Somewhere is written that 2 nozzles takes about 120W and the 12V heatbed needs another 100W. Is the remaining 100V not enough for the rest of the printer needs?
I don’t understand…[/quote]

Don’t be sorry @svdv , your effort in the document has helpt me alot, the latest information regarding W requirments is new to me aswell after reading hundres of threads before jumping on the installation. - Without the document (and Marlaks heatbed) I would still be bying Buildtak and not beeing able to print ABS and even having issues with the larger PLA prints. Now I manage to print on the whole buildplatform and still have an 90% successrate vs 30-40% before. :slight_smile: Vertex with heatbed is doubling the value of the printer. Thank you.

Using orignal PSU for the vertex, and RSP-320 only for the heatbed seams to work. RSP-320 shuts itself of if it is overloaded so I dont belive there will be issues with it being a bit undersized, but for those using thinking about extending to a similar setup go for a larger PSU, >350w for 15V.


#174

Have to say i am nervous to go on this adventure.
But looking at all the post and specially the fact that there is a dummy guide (thanks for that @svdv) gives me the good hope i can build it.
I did send you a email Marlark, i will wait on your response so i am sure i do it correctly with the paypall transfer.


#175

size=150 Current Stock Status : 79, Sold : 32
[/size]

Going fairly good i have to say a couple every week. Most of them have gone inside the EU and on the top list is the Netherlands with France close after :wink:

As you can see above. There is a bunch left for those that would like one for their printer. Helps a lot with large PLA prints and defenetly ABS based prints.


#176

LOL what an odd number to order: 111 Heatbeds :stuck_out_tongue:
Thanks again Marlark :wink:


#177

Actually ordered 110 got 2 extra for free for some reason. I’m not counting my own bed is why. :slight_smile:


#178

Is their a reason why internationally (EU) shipping is so expensive?

Cheers,
Dylan


#179

A combination of many things. But the main reason is that i live in sweden and sweden is a expensive place if your going to send anything anywhere with anyone especualy as a private person. I wish it wasnt but i cant realy do much about that :frowning: There is a cheeper way but it would require a lot more work to save a couple of Swedish crowns and to be honest it aint worth it sins i dont make anything by doing this. I have money put into this but when all of them are gone i will only have made a + on the 2 plates that i got for free from the supplier. If i where a company and had a agreement with the shipping company then it would be somewhat cheeper but i dont have that.

// Ted


#180

Oh, I understand and the size of the item is also a factor…

Cheers,
Dylan