a20m

[spanner82]

purchased the A20M dual colour printer but almost immediately the Zaxis limit switch failed, whilst waiting for a similar replacement I used the onboard menu to raise Z 10mm as I was installing a magnetic bed, the problem now is,after finally getting limit switch, when I "home" the "z" axis rises
and keeps rising and is nearly at it's upper limit and I cannot get it to bed level. I have tried winding it down with power off,but as soon as the power is on it rises, it seems strange that you can cange any axis by various amount but only in one direction, how do I get it to home ??

[William]

Hello, this problem may be related to the limit switch. If the print head cannot return, it may be that the limit switch on the shaft is closed or the limit switch line is open.
1. Press the shaft limit switch several times to see if the spring leaf does not pop up. If the spring leaf does not pop up, you can replace the limit switch.
2. If there is no problem with the limit switch, check whether the circuit has a short circuit fault.
3. You can also test whether the limit switch is normal on the software. Such as the link below.
http://geeetech.com/forum/viewtopic.php?f=17&t=60927

[William]

Hello, this problem may be related to the limit switch. If the print head cannot return, it may be that the limit switch on the shaft is closed or the limit switch line is open.
1. Press the shaft limit switch several times to see if the spring leaf does not pop up. If the spring leaf does not pop up, you can replace the limit switch.
2. If there is no problem with the limit switch, check whether the circuit has a short circuit fault.
3. You can also test whether the limit switch is normal on the software. Such as the link below.
http://geeetech.com/forum/viewtopic.php?f=17&t=60927