Upgrading from button switches to induction switches

Hey everyone, my z limit switch just broke, and after speaking with Will through customer support, it seems I need to upgrade to the new induction switches. Which is great, those old push button switches seem way too fragile, and it’s a shame when a tiny plastic part can totally shut down your machine for days until it is replaced. So I look forward to the upgrade.

My problem is, my HDZ is currently fully retracted all the way up (which is what killed my z limit switch), and it appears that it needs to be lowered in order to install the new induction switch. Is there a trick to get that HDZ to lower enough for me to install?

Previously, when the push button switch was half-functional, I just needed to unscrew it from the HDZ, and manually press it while the machine was trying to initialize, which would “trick” it into lowering again so I could reinstall the switch. Can I do something similar with the induction switch once they arrive, or is there another trick to get that HDZ to lower enough for the install?

Thanks for the help!

There is probably a better way that someone will contribute…but you COULD do the same thing with the induction switch. Just put a screwdriver against the switch (before you mount it) and it should trick the sensor into thinking it’s closed and lower the z…same way you did with the button (I think).

But there must be a better way…

Usually I just power down and then rotate the coupler so as to turn the ballscrew and reposition the Z-axis.

​Tedious, but it works.

Thanks Will. The problem is, the HDZ is all the way up, so I can’t access the coupler :-/

If you can reach the ball screw and turn it. That is very hard but you dont need to turn the z all the way down just enough to get your switch installed. If worse comes to worse then remove your spindle mount so get to the hdz coupling and/or ball screw.

FYI I love my HDZ

1 Like

As @gdon_2003 noted, turn the ballscrew itself.

The alternative is to power up, connect, then go to the MDI and use a command such as

G0 Z-50

to lower by almost 2 inches (50mm).

2 Likes

This was the best/smartest solution, thanks Will!

I’d add a G53 there. Z-50 might be below your wasteboard.

G53 shouldn’t be needed in this context — the machine hasn’t been homed — the situation is it is just powered up, so machine origin is the current location.

1 Like

Sorry, I don’t use Motion. I also forgot that Corey doesn’t have a switch. Would you need to send a $X?

This topic was automatically closed after 30 days. New replies are no longer allowed.