I’ve taken a leaf from @Alex_Skoruppa ’s book and shifted the probe on tge #AX-02 to under the nozzle. It magnetically snaps into place Yes, it wobbles slightly, but only under fast moves, and it returns to the same position due to the magnets. I’ll be fixing it so it doesn’t happen later. I’m still playing with currents on the steppers and it’s on an old Ikea table that amplifies everything hence it being louder than it actually is.
I’ve also changed out the spiral wrap to woven split tube which looks a whole lot better and makes things a lot easier and quicker to work on.
The effector is 8mm thick and has 2x 5mm diameter magnets in and was just in the place the original holder was in, quick change and a new mount for the sensor and can now probe the whole bed properly.
Cheers Alex. I just need to make it taller to get a decent Z height. If I add another 200mm on the uprights and rods, it’ll have around 320mm in Z. I have a shorter set of arms waiting to be assembled, but have to wait for some epoxy putty to arrive as the inner diameter is a little too large for the grub screws, I’ll lose a little on the printable area, but I’ll gain about 100mm in Z height. I’m also not installing them until I can run calibration properly. The replacement board should be here tomorrow, though.
If it’s under the nozzle, then there is no need for an inductive probe. Change to a microswitch for lower cost and higher accuracy.
@Stephanie_A - my preference is for a non-contact solution. Yes the magnets would most probably hold it, but there is always that chance it could come off, and cause a crash into the bed. I’m not exactly wanting to use a bolted solution as the quicker I can snap on, probe and remove it, the quicker I can get printing. The old adage goes - time is money. Sacrificing a small amount of accuracy is worth the time and issues it could cause by using a micro switch.
I would use an alignment pin or method along with the magnets.
FYI look at Tom’s recent in depth reviews of sensors and you’ll find the most accurate one is the microswitch.
@Stephanie_A fully aware. Inductive sensors are just behind though…