Nozzel offset issue

I am facing nozzel height problem in printing. I am using core xy Hypercube printer and inductive sensor for z height. I have set up Marlin and also using G29 command nozzel height and z-offset is calibrated (my z-offset is 0.1mm). While z-offset calibration, I have adjusted z-offset so that only bussiness card can pass(i.e. 0.1mm). But while actual printing, heatbed stops at somewhat 8-10mm away from nozzel and material falls from 8-10mm onto heatbed. I don't know how it is happening.why nozzel is not coming to 0.1mm while actual printing and why it stops at 8-10mm aways from heatbed? I am unable to resolve this issue. If you can help me in this case , I will be grateful to you. Please kindly help me.

I can't remember the details. Must be old age. Im sure others will help.
The paper calibration system that you used is for a fixed switch system. If you are using an inductive sensor you have to specify the sensor offset to the nozzle. This is a different parameter and is the distance from the nozzle to the point in space the inductive sensor detect at - not the end of the physical sensor.
I suspect you have manually adjusted the bed to the nozzle but when you print it is ignoring that as it uses the inductive sensor. So your 8-10mm error needs to be entered as the sensor offset.

Yes my proximity sensor is fixed only. There are many videos on YouTube showing calibration of nozzle offset and they have used proximity sensor only. I followed the same one.
1) When I use G29 command for bilinear calibration system before printing at that time bed comes near to the nozzel and there is small gap of 1mm between nozzle and heatbed . And also red light of proximity sensor glows.

2) but when it starts actual printing, bed reaches upto 8-10mm away from nozzel and stops there only. And also proximity sensor's light doesn't glow. And in that position only printing starts and material started to fall from nozzel onto the bed.


You are saying the sensors detection distance. But sensor detection distance was around 4mm written over the sensor. And also when the printing starts from 8-10 mm away at that time LED of sensor doesn't glow there.still printing starts from there.

I haven't used a proximity sensor in ages and I don't use a core X-Y often so don't believe all I say. Im just trying to help - as no one else has offered.
So If the gap from nozzle to bed is 1mm then the z offset should be -1. I think that's right, although its the bed moving, bed down is positive. Sounds like you may have the 4mm entered somewhere with a + sign.

So how did you solve your problem?