Symptoms

After printing, there are no printed objects adhering to the surface of build platform, and there are cured layers left in the resin tank.

 

1. Build platform surface is too smooth
2. The exposure time of initial layers is insufficient
   
3. The temperature difference between the resin and the build platform is too big
4. Build platform surface is out of flatness
5. The connection area between the model and the build platform is too small
   
6. Build platform level is not well calibrated
7. The 3rd party resin is not suitable for printing with the printer

Diagnostic Steps

1. Build platform surface is too smooth
   Diagnosis: the build platform will have insufficient friction that the cured model can not adhere to the build platform.
   Solution: Polish the build platform surface diagonally with sandpaper of 60 grit.
   Reference video: Build platform sanding
2. The exposure time of initial layers is insufficient
   Diagnosis: The initial layers exposure time is not enough that the first layers are not cured completely.
   Solution: Increase the Exposure Time of initial layers (Burn in) accordingly, you can also contact support@uniz.com for exact recommended values.
   
3. The excessive temperature difference between the resin and the build platform
   Diagnosis: When the preheated resin comes into contact with the cold build platform, the relative expansion of the two materials will be greater, resulting in falling off.
   Solution: Maintain the ambient temperature between 20 ℃ and 22℃ with air conditioner or third party air heater.
4. Build platform surface is out of flatness
   Diagnosis: The uneven build platform surface will make the cured model can not be adhered completely to the surface of build platform.
   Solution: Replace the build platform with a new one, you can contact support@uniz.com for the purchase of spare parts.
5. The connection area between the model and the build platform is too small
   Diagnosis: The small connection area will not be able to provide enough adhesive force.
   Solution: Adjust the layout of the model, for models with supports, select Linear or Full base type for a bigger connection area.
    
6. Build platform level is not well calibrated
   Diagnosis: If the build platform level is not good, on the upper side, the solidified layers will not be adhered to the build platform.
   Solution: Recalibrate the build platform level correctly.
   NBEE zero&leveling reference video: How to zero&leveling 
   
7. The 3rd party resin is not suitable for printing with the printer
   Diagnosis: The shrinkage properties of this resin may be very strong, making it unsuitable for ultra-high-speed UNIZ printers such as NBEE.
   Solution: Print using UNIZ brand or UNIZ officially certified resin. you can see all certified resin here: Open Material List
   You can also contact support@uniz.com for further test in UNIZ laboratory.