Site Navigation

Your Account

Choose Language

  1. Don't forget to put back the 2 jumpers on the ZB socket if you had the second Z motor plugged into it it before.
    • Don't forget to put back the 2 jumpers on the ZB socket if you had the second Z motor plugged into it it before.

    • Don't do any connection with the power on, these are current drivers.

    • Connect the endstops to their connectors. Make sure the endstop connected to Z is the one closest to the Z motor, and the one connected to E0 is closer to the E0 motor.

    • edit it first to avoid forgetting.

    • NOTE: you now need to change the G1 Z2 F6000 line to read G1 S2 Z2 F6000

    • The M584 line is critical, it's combining the axes. The P3 parameter only shows 3 axes to hide the U axis.

    • Because we'll split the axes during the homing we have to configure everything for U: acceleration, endstops, etc.

    • Don't forget to configure the new motor too.

    • The first M584 splits the axes into independent Z and U. It also displays U (P4) because otherwise the controller doesn't move it.

    • After splitting, we move Z and U simultaneously and at the same speed towards their respective home switch.

    • The second M584 re-combines the axes as Z and hides U (P3)

    • NOTE: you now need to change the G1 Z2 F6000 line to read G1 S2 Z2 F6000

Finish Line

One other person completed this guide.

Nicolas Raynaud

Member since: 06/14/2018

136 Reputation

1 Guide authored

7 Comments

Thanks for this guide! I was struggling with using M584 P3 in config.g and not having the the U (and V in my case) leadscrews moving. Updating the P parameter in homez.g did the trick.

George Joseph - Reply

This is a good guide,

I solved the problem this way.

I mechanically limited the the two lead screws, wired the 2 limit switches in series and made the homez.g go up once to limit, advance 1-2 mm (trip trip trip), rehome. Works perfect every time.

When the table is way off, one side bumps up against the stop until both limit switches close.

I could see this working with 3 and 4 screws too. Just need a limit switch for each one.

All motors need to connect to the Z output. (Series) I think?

James Harrison (Jimbo) - Reply

James, can you provide some more information on how you achieved your approach? How did you mechanically limit the 2 lead screws, wire in series for the end stops, and gcode you needed to add? Your way sounds a bit more direct. Thanks in advanced!

Bill McDaniel -

I used this guide - really well done! Thanks!

Bill McDaniel - Reply

Note that the line:

G1 Z2 F6000 ; Lift Z relatively to current position

Needs S2 added to it, so should read:

G1 Z2 S2 F6000 ; Lift Z relatively to current position

Its a FW requirement for current versions.

Bill McDaniel - Reply

Add Comment

View Statistics:

Past 24 Hours: 3

Past 7 Days: 27

Past 30 Days: 116

All Time: 1,187