Simple Metal: Heated Bed & X and Y axis upgrade.

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Simple Metal: Heated Bed & X and Y axis upgrade.

Postby joaoalves » 2017-Feb-Wed-16-Feb

Hi everyone. I'm here because I need your help/opinion.

I have a Printrbot Simple Metal that i've bought as a kit almost 2 years ago. It's been working fine, but i'm starting to feel limited by the build size, and the warping on pla (I'm an architect, so I need my prints to be as flat as possible).

So, i wanted to upgrade my X and Y axis, and wanted to add a heated bed. As I live in Portugal (Europe), I cannot buy the Matrix Precision kit, so i'm designing my own, and i'll make it and share it.

The thing is, I'm not experienced with electronics, so i'm not sure which ATX power supply should I buy (I was thinking on the MK3 heated bed), and do I need a relay on the wiring for this job? My board is a Printrboard Rev F4.

What should I look for on a power supply?

Thank you,
João
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Simple Metal: Heated Bed & X and Y axis upgrade.

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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby RetireeJay » 2017-Feb-Wed-17-Feb

You should look for an ATX supply rated to deliver at least 300 watts. You can get one rated for 400 or 500 watts and be confident that your power supply will be operating very comfortably, not straining at all to give you all the power you need. Don't worry about drawing a lot of power from your mains; 85% or more of the power drawn from the mains is delivered to the load. If your load is actually 250 watts, then you will only draw a bit more from that from the mains, regardless of your supply's rating.
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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby joaoalves » 2017-Feb-Thu-06-Feb

Thanks RetireeJay! so i won't need a relay, right? and another thing came to my mind. Do you know the difference between the 24v and the 12v connection of the heated bed? thanks !
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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby RetireeJay » 2017-Feb-Thu-07-Feb

On a heated bed that has options for either 24V operation or 12V operation, the difference is that the heating elements are either wired in series (24V) or in parallel (12V). When using a Printrboard, you will want to use the 12V arrangement.
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Printrbot Plus operational January 2013
Brass threaded rods (5/16" X 18) & nuts for Z axis
GT2 belts & pulleys
Cable chain to reduce probability of fatigue failure in wires
E3D V5 Hot End, 0.4mm nozzle, also 0.8 and 0.25 in use occasionally
PB fan mount + 40mm fan -- using printed mount adapter, not the E3D supplied fan
Injection molded extruder gears
Optical Z "endstop" (custom designed and built)
Have used many pounds of T-Glase filament. Now also doing some work with Ninjaflex SemiFlex
Print on glass with Scotch Craft Stick or other glue stick
"My next printer is..." Prusa i3 MK3
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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby joaoalves » 2017-Feb-Thu-08-Feb

Thank you, once again RetireeJay! I'll post some pictures when the mod is done!
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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby coastline » 2017-Feb-Thu-11-Feb

Matrix Precision only ship internationally by request there is no option on the website.

But if you send them an email with your address they will send you a shipping quote.

At least they did when I ordered mine in 2015.

I can vouch that it is a very nice upgrade!
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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby joaoalves » 2017-Feb-Thu-15-Feb

I've already bought all the hardware today, but thanks anyway coastline!


Also, RetireeJay, the shop I went today only had this ATX "1Life ps:jet 600W 120mm" with the 6pin PCI-e. Do you think it will run ok, or is it too much?
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Re: Simple Metal: Heated Bed & X and Y axis upgrade.

Postby RetireeJay » 2017-Feb-Thu-16-Feb

joaoalves wrote:Also, RetireeJay, the shop I went today only had this ATX "1Life ps:jet 600W 120mm" with the 6pin PCI-e. Do you think it will run ok, or is it too much?

There's basically no such thing as a power supply that's rated for "too much" power. When the power supply gets too expensive, or too large for your space, then it's "too much" but unused wattage capability by itself doesn't hurt. It's like having a very powerful engine in your car. You can drive perfectly safely and within the speed limit; the extra power just stays in reserve. Except that in the case of car engines, larger ones have more internal friction and losses so your fuel economy suffers; with power supplies, the extra power "at idle" for a 600 watt supply is not a great deal more than the "at idle" power for a 300 watt supply (this depends more on the manufacturer and the design of the supply than just the watt rating).
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Printrbot Plus operational January 2013
Brass threaded rods (5/16" X 18) & nuts for Z axis
GT2 belts & pulleys
Cable chain to reduce probability of fatigue failure in wires
E3D V5 Hot End, 0.4mm nozzle, also 0.8 and 0.25 in use occasionally
PB fan mount + 40mm fan -- using printed mount adapter, not the E3D supplied fan
Injection molded extruder gears
Optical Z "endstop" (custom designed and built)
Have used many pounds of T-Glase filament. Now also doing some work with Ninjaflex SemiFlex
Print on glass with Scotch Craft Stick or other glue stick
"My next printer is..." Prusa i3 MK3
User avatar
RetireeJay
My next printer is...
 
Posts: 4936
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