Knowledge Base:  
You are here: Knowledge Base > Tech Support
Why does the MDX-540 Z Axis spindle head lower once I shut off the machine?
Last Updated: 09/20/2016
When you shut off the MDX-540 you will always hear a click. On the Z-Axis the MDX-540 has a solenoid that pushes against the coupler between the motor and the ball screw. What this does is it keeps the spindle head from just lowering down. Without this feature/solenoid when the motors are disengaged or lose power than under the weight of the spindle, the z-axis would just drop to the table.

When you start the machine and the motors are engaged the solenoid is activated. Which basically pulls it back, it is spring loaded. Then when you shut off the machine it releases and springs forward and holds the z-axis in place.

Once this item goes bad the spindle will drop to the table. Another issue that is common when the solenoid goes bad is it has the opposite effect it is never fully engaged and so it rubs against the coupler causing the z- axis to have Z overload errors. It basically makes the z axis have to work harder to turn the ball screw.

This is an easy fix you just need to order the new solenoid and replace it. It is located behind the Z Axis just above the cover on the machine. it is covered by a little metal cover with 2 wires running into it. You will just remove the old one and replace with a new one and plug in the wires. This takes about 10 minutes.

Here is the diagram of the solenoid assembly. I typically just recommend buying the solenoid and spring if you think the spring is bad. But if you remove yours and the plunger or rubber tip is damaged you will need it also.

Item 32 12359185 Rubber, Foot
Item 36 22435329 Solenoid
Item 38 22175217 Spring, Solenoid
S2 21049114 Cap-Screw 5x12 NI




Was this article helpful?

Comments:
 

Related Articles
 > How do I Cancel a Print Job on MDX-40, MDX-40A?
 > I get Port Not Ready error, how do I fix this issue?
 > Can the MDX machines cut Steel/Stainless Steel/ Titanium?
 > Do I need to do ROUGHING passes with each tool?
 > Why do I sometimes get the lines across my model wax and another materials?
 > Do I need a different tool to do engraved and standing letters in wax?
 > Do I need to change a parameter in Modela Player 4 or SRP Player to get better fine lines and detail in my jewelry wax?
 > SRP Player can not find the machine and will not start without a machine present what should I do?
 > I want to load SRP Player software on multiple computers, how do I install the print driver?
 > Where can I get drivers or firmware upgrades for my Roland Machine?
 > I lost my Users Manual where can I get a replacement for my Roland Machine?
 > I need instructions to upgrade firmware on my Roland machine?
 > When I bought my machine I had a Training CD with it, I need a replacement?
 > Where can I get software updates for my Roland Machine?
 > How do I install a driver for my machine if I do not have the CD or my CD or driver is out of date?
 > How to use the PC Board CAM software with the PC Board Prototyping System to create custom PC Boards
 > Creating a CAM job for Eagle for the PC Board CAM software