nanoDLP

rob

Member

Registered: 2017-09-28

Posts: 54

Clarification about slicing (burning layers and total height)

Hi,

as we are trying to fine calibrate our printer output, I was reviewing the plates info to know exactly how many layers where printed and at which thickness.
Our current config is 50µm for normal layer, 10 burning layers of 100µm.
I was checking one model which is 9mm high. The plate.json corresponding info is

'AutoCenter': 0, 'BlackoutData': '',  'Corrupted': False,
'CreatedDate': '0001-01-01T00:00:00Z','ImageRotate': 0,
'LayersCount': 180,  'LowQualityLayerNumber': 0,'MaskEffect': 0,
'Path': 'test_name', 'PlateID': 22,  'PrintEst': 5648, 'PrintTime': 5639,
'Processed': True,  'ProfileID': 4, 'StopLayers': '',
'TotalSolidArea': 13.632817, 'Updated': 1518092559, 
'Xmax': 18.762249, 'Xmin': -65.18048,
'Ymax': 80.61419, 'Ymin': 32.32542,
'Zmax': 9.000005,  Zmin': -3.6585864e-06

It counts 180 layers, which means 180*0.05mm=9mm. Seems like the 10 burning layers are not counted.
So I would like to clarify which option (if any) is true:

• are the burning layers (10*100µm=1mm) considered as extra? I mean it prints 1mm base and then starts printing the model with 180 layers at 50µm.

• are the burning layers considered as part of the model? If so:

  • Does the slicer first take 10 slices at 100µm (1mm) and then the remaining 8mm at 50µm (160 slices)? I guess this should be the behaviour, though it outputs 180 slices instead of 170 (10+160).

  • Does the slicer slice the whole model at 50µm (180 layers) and then expose the first ten at 100µm and the remaining at 50µm? If so it seems like a wrong behaviour, as it is deforming the object. First 10 layers will be of different height from the expected.

Thanks in advance for any clarification.

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,541

Re: Clarification about slicing (burning layers and total height)

"Does the slicer slice the whole model at 50µm (180 layers) and then expose the first ten at 100µm and the remaining at 50µm? If so it seems like a wrong behavior, as it is deforming the object. First 10 layers will be of different height from the expected."
It is the current behavior, If you are using FEP normal and burin layers thickness should be same but for  PDMS burnin should be thicker than normal layer.