We have been running an SLA 190, without a wiper arm for a couple of years now with the SL5170 resin. To work
out the wait times, you need to look at a value called the critical circle diameter, CCD. This is defined as
the diameter of the largest circle which fits entirely inside the solid portion of a slice cross section.
So for each layer, if you find the CCD, there is a table below which you can look at to get the wait time that
you need to leave for that layer. You need to do this going through the part, finding the different CCD's.
The layers can be grouped together, so if between a z height of 7.5mm and 10mm, the CCD's are the same or
similar, group them together so that you will get a wait time for that portion of the model. Do this for the
whole model, so that you get a series of wait times for different portions of the build.
You can then add in different recoat styles into the partman file for different z heights, and edit them to put
in the wait times.
Here is the conversion table to get the wait times. These values are given for a layer thickness of 0.15mm.
Going thinner than this, you will need to increase the wait times further, but we don't have any values, so you
may have to experiment a little. Use a wait time of 10 seconds for supports.
Range of CCD's (in mm) Z wait time (in seconds)
If you need to use a wait time longer than 999 seconds, you need to edit the filename.r build file.
I hope this is some help, and be warned that you may get bubbles trapped in the parts if you aren't using the
-- John Male Research Student Centre for Rapid Design and Manufacture Buckinghamshire College of Higher Education Queen Alexandra Road High Wycombe Buckinghamshire England HP11 2JZ
Tel 01494 605085 Fax 01494 538593
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