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Power supply

erniehatt

Power supply
January 22, 2019 04:09PM

Registered: 8 years ago
Posts: 165

The power supply has packed it in, would a 12.5 amp be suitable as a replacement.
The hotbed is on a separate 24v supply.
So the 12v 12.5 amp supply will only supply the control board and the hotend and motors.

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Roberts_Clif

Re: Power supply
January 22, 2019 05:30PM

Registered: 6 years ago
Posts: 1,863

Lets look and see.

40 watt Nozzle heater is 3.33 amps
If 4 Steppers motors drivers ~ 2 amps each is = 8 amps max.
leaving ~ 1.17 amps for the LCD and all other components.
If 5 Stepper motors no.

Now if the Steppers are 1.5amps then 4 steppers would be = 6 amps that would leave you ~ 3.17 amps for the LCD and all other components.

This could work.

Computer Programmer / Electronics Technician

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dc42

Re: Power supply
January 23, 2019 02:59AM

Registered: 10 years ago
Posts: 14,672

The stepper motors are driven through constant current switching drivers, so the stepper motors will take far less than 2A each from the PSU. More like 0.5A each tops. So 12.5A is easily enough capacity.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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erniehatt

Re: Power supply
January 24, 2019 02:40PM

Registered: 8 years ago
Posts: 165

Thanks to both of you for replying to this topic, probably the best idea is to try it and see what happens.