At the Arduino end, connect the extruder wire to the x axis wire then send a command to move the x axis.
Does the motor work then?
If it does, you probably have a bad driver.
If it doesn't recheck wiring.
You can do the opposite while you're at it. Connect the x axis motor to the extruder...
Of course you can do all of that.
The question is do you know how to? Since you're asking if you can, I would guess not.
The printer uses Marlin firmware. You'll need to be able to make changes to it.
Start by learning Marlin.
Ha! Series 1! I have serial number 34 and it was still printing great!
I say was because I recently decided to rebuild it just to get rid of the wood.
Really good printers. Too bad they priced themselves out of business.
The end is loose.
You need to re-tighten it occasionally.
Here's the instructions.
Your best bet is to take the whole thing apart, clean it very well, then reassemble.
Unless I'm missing something the Palette doesn't attach to the extruder at all. It fuses filaments together internally then feeds them to the printer like any other filament. The work is done in the slicer so as long as you use their slicer, it just works.
So you have to figure out why it's not homing.
Does the X axis make it to the homing switch? If not, what's stopping it.
Does the Y axis make it to the homing switch? If not, what's stopping it.
If you can post a video of the homing sequence, there may be something obvious in it.
Look for loose...
Isn't good?? It's 2.5mm across a 18" glass bed. The glass itself is probably that uneven.
We're talking mm's.
Here's mine and it prints perfectly.
Can you show us what yours looks like? Must be close to perfect if you think these are bad.
Extrusion width isn't just some arbitrary number.
It might be printing better but you need to tune your extruder to make sure 20mm is really 20mm.
I find the default settings are way off.
Here's a good guide.
Pay attention to the extruder...