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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: No power to heatbed, how to test ramps for problem?? - 11 years ago
I can't see any faults bar the mosfet, i remember i did see some smoke before but couldn't trace it. But the heatbed was still working after that. I just seen the boards are only 12 euro on ebay so to save alot of hassle i bought a new one. Thank you for your advice though!by foster182 - General
Re: No power to heatbed, how to test ramps for problem?? - 11 years ago
I wounder is my power supply amps too high for the heatbed 12v input, its a universal 20a power supply i'm using. Or just might have been faulty. Is there any spec i should stick too when ordering one of these encase i cannot find the exact one?by foster182 - General
Re: No power to heatbed, how to test ramps for problem?? - 11 years ago
ok think i found the culprit, any ideas why that blew? I resume its the 12v voltage regulator for the heatbed yes?by foster182 - General
Re: No power to heatbed, how to test ramps for problem?? - 11 years ago
Thanks for the reply's, checked the fuses there working, getting continuity and getting 12v across both. Checked the bed for continuity, not faults. Any other suggestions? what way is power routed on the ramps for the heatbed? 12v input on the ramps input rail->fuses->?->?->mosfets?->D8? Sorry i'm not very familiar how the board works but if i know what other components to check.by foster182 - General
No power to heatbed, how to test ramps for problem?? - 11 years ago
I'm getting no power to my heatbed, just stopped working. Tested with multimeter and i'm getting 12v to the ramps power input from the power supply to supply heatbed but i'm just not getting voltage from D8 to the heatbed. Everything else on the board is working, i'm still reading a temperature from the heatbed termistor etc, just not power to the heatbed. Anyone have any ideas what i can do to mby foster182 - General
Re: Smoke from ramps after connecting power supply, please help!!!! - 11 years ago
Thanks for the reply guys, I ran over the wiring a few times and found no faults. So I said feck it a turned it on again and it worked Very strange, maybe there was some residue on a MOSFET or something and it burnt off, I've no idea, but the heatbed works so happy days Takes AGES to heat up to my required temp but its working. Thanks anyways!!!!!by foster182 - Controllers
Smoke from ramps after connecting power supply, please help!!!! - 11 years ago
Hi guys my reprap has been working perfect using a 20 amp 12v power supply just connected to the 5a input. I wasn't using a headbed. Now when i installed one, i ran the wires from the power supply to the 11a input on the ramps. When i turned it on after a few seconds smoke started to rise from the board so i disconnected it straight away. I'm not sure what to do now, I don't want to connect itby foster182 - Controllers