01. Electronics

PS: Don't worry about these three. They are used for the Raspberry Pi upgrade. You may use them later or not.

All this beauty...

M3x25

These yellow rectangular fuses may be hiding this hole. Fearlessly but gently bend them away.

M3x25

The Goal.

Disconnect the power supply connector from the rest of the power wire harness.

Remove the nut and spring washer from the connector.

Insert the connector into the frame from the outside.

Secure with the spring washer and the nut.

Remove one nut from the front of the power switch.

Place the switch into the "Big Friendly Button" hole from the inside.

Secure with the nut.

Commonly, switches are installed so that

bottom position = off

top position = on

Re-attach the positive terminal to the switch.

Re-connect the negative spade connector.

Minus MUST connect to minus and plus MUST connect to plus or you WILL destroy your board and will need to buy a replacement.

Read the wire labels. Red wire is always plus. Black wire is always minus.

You can find little pluses and minuses on the RAMPS board next to the connector.

Make sure to properly insert the power wires into the green RAMPS power connector, and tigten them very well. If you leave this connection loose, it may lead to excessive contact oxidation, excessive resistance, and eventually to a melted connector or fire.

The wire ends (crimps, ferrules) are thick; you need to fully open the connector.

fully open :-)

not fully open :-(

Tidy up with 4'' zip ties.

You can tighten these only lightly by hand.

M3x16

M3x16

Twisting a wire can be art.

What an elegant twist.

The ridges of the heatsink should be vertical so that the heat fleets faster.

Heat has a tendency to rise up.

It is important that the heatsinks do NOT touch the pins on the drivers.

The heatsinks could connect the driver pins and burn out the driver'.

We actually put a protective isolating liquid over the pins to protect against shortage, but it's better to just leave the pins alone.