A few noob questions..
Posted: Tue Jan 27, 2015 8:06 pm
Hi Everyone,
Noob here.. Hope you guys can take the time and help me with these few questions that I have:
Question #1:
I wanted to make a laser SLA, and initially wanted to use an x-y gantry. I wanted to simplify the setup, and was wondering if I could use some cheap stepper motors with 18deg steps, and 100:1 gear reduction as galvos. I noticed that there isn't much talk about using steppers as galvos for SLA application, so I'm assuming that perhaps there are weaknesses in that approach. Would someone care to educate me? Is it a speed limitation? backlash issue? reflection issues? cost? firmware/software? Why don't I see a lot of stepper galvo designs out there?
Question #2:
This is about the top down and bottom up approach.. Quality wise, is there a difference? It seems to me that the top down approach is the simplest and most cost effective way to do it, especially that you can pour the resin back into your storage container after use. Thinking about it a little bit more,
If I go with the top down approach, if the part being printed is large enough, wort shrinkage alter the level of the resin's meniscus in the container? How do top down systems account for that? (or do they not?)
I'm looking to start building soon, and have all the parts on hand. I just want a 3.5x3.5x6 inch build dimension.
Thanks in advance
Noob here.. Hope you guys can take the time and help me with these few questions that I have:
Question #1:
I wanted to make a laser SLA, and initially wanted to use an x-y gantry. I wanted to simplify the setup, and was wondering if I could use some cheap stepper motors with 18deg steps, and 100:1 gear reduction as galvos. I noticed that there isn't much talk about using steppers as galvos for SLA application, so I'm assuming that perhaps there are weaknesses in that approach. Would someone care to educate me? Is it a speed limitation? backlash issue? reflection issues? cost? firmware/software? Why don't I see a lot of stepper galvo designs out there?
Question #2:
This is about the top down and bottom up approach.. Quality wise, is there a difference? It seems to me that the top down approach is the simplest and most cost effective way to do it, especially that you can pour the resin back into your storage container after use. Thinking about it a little bit more,
If I go with the top down approach, if the part being printed is large enough, wort shrinkage alter the level of the resin's meniscus in the container? How do top down systems account for that? (or do they not?)
I'm looking to start building soon, and have all the parts on hand. I just want a 3.5x3.5x6 inch build dimension.
Thanks in advance