![]() Then check one more time that you’ve unplugged your 3D printer from the mains. Then make sure you’ve unplugged your 3D printer from the mains. Unplug your 3D printer from the mains (or ‘outlet’ if you’re American). Wait at least 30 seconds before handling unplugged electronics to give them sufficient time to discharge. An easy way to ground yourself of any electrostatic build-up is to touch a grounded piece of metal (like a radiator) before touching any printer electronics. Always make sure your power supply is disconnected from any outlets and you have grounded yourself to prevent shocks and electrostatic discharge. Electrostatic discharge (ESD) can destroy chips on your 3D printer’s control board, rendering it useless. It’s your responsibility to work safely when dealing with electronics. (Sorry! But if you order the wrong parts, you can still order new voltage-specific components separately, which works out cheaper than buying a whole new unit). We recommend this because it avoids an annoying halt to your upgrade project if you buy the wrong components, and, more importantly, because we’re unable to refund the return cost of items ordered in error. Spec sheets are usually a trustworthy source of information, but we strongly recommend checking your PSU directly before buying upgrades. A customer has bought a second-hand 3D printer where the previous owner had swapped out the PSU for something else without making it clear. ![]() The manufacturer has the wrong PSU rating listed on the printer’s spec sheet because they switched it out for something else in the middle of a production run without updating the documentation.Simple enough, right? But beware! Our customer service team have encountered these common user pitfalls to watch out for: If you have a 24V power supply, get a 24V Hemera. In a short circuit event, more power could be dumped into the component or device that is short circuited – but that would happen with any PSU, just with a low power one it won’t dump as much before the PSU’s short circuit protection kicks in. So, a PSU that has much more power than it needs won’t really do anything bad. If you take a 600W PSU and plug it straight into a 40W heater cartridge, only 40W will be used. It’s the component that “pulls” in the current it needs – the PSU can only limit it. Is it dangerous to use a higher rated power supply with lower rated components?Ī PSU gives components the ability to draw the current they need (up to a limit). Plus, it’s always good to have some extra power if you want to upgrade your 3D printer with other rated components later. current spikes when motors and heaters turn on). When choosing a PSU, it’s a good idea to budget at least 10% more power than you need – this will account for voltage drops, increases in resistance due to higher ambient temperatures, and handling any transients (i.e. This means you need thicker wires to handle the larger currents, so more copper needs to be mined to manufacture it – meaning a larger environmental impact. Using a 12V supply means you need to double the current than that of a 24V supply for the same device you are powering. If you’re choosing a new power supply, it’s wise to go with 24V, but either standard will work fine as long as you use components with a corresponding rating.
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