Messages

1

3D Printers / Re: Multiple Galvos

« on: January 23, 2018, 09:04:41 AM »

Hey Mac,

Again thanks for getting back to me, I am learning bucket loads! Sorry, about departing somewhat from the topic subject. Yeah, I think I will do some digging for some datasheets on those units, not sure I will get much from the Chinese manufacturers, but since I wanna get it close to right the first time, it might be worth investing in some more locally produced equipment, which might also make finding datasheets easier.

Further to the laser resolution, I have a couple of follow up queries if you would indulge me. Your note, in regards to the departure from the theoretical valve, would it be a safe bet to assume for design purposes, an operational valve of 80% that of theoretical, hence 4096 * 0.80 = 3276, odd? Therefore an expected point shift of approx. 0.09mm for an 300mm area. Further to the point shift, given 0.09mm between points, would you need to allow for the laser dot to be focused to a approx., diameter of between 0.1mm to 0.09mm? Just wanted to cross tees and dot i's before taking my foot off the till.

2

3D Printers / Re: Multiple Galvos

« on: January 22, 2018, 11:01:38 AM »

Hello,

Thanks for coming back to me mate, wasn't sure you would, I have been having a spot of bad luck getting fed back from anybody. Ideally, it would be a build area of 300mm x 300mm, and just trying to squeeze as much res. out of it as possible. Your response to alignment issues, was certainly playing on my mind, would your board drive one of these Chinese scanner heads, or similar?

https://www.alibaba.com/product-detail/405nm-High-Speed-Laser-Scan-Head_60484790424.html

And I could just add a pimpin f-theta lens like this one:

https://www.aliexpress.com/item/FL-254mm-scan-area175-175-YAG-semiconductor-fiber-galvo-f-theta-scan-lens-system-for-laser/1473906553.html?spm=2114.10010108.1000014.10.2ae04e73ZWkwTS&traffic_analysisId=recommend_3035_null_null_null&scm=1007.13338.80878.000000000000000&pvid=511bd05e-96bf-4e7b-a973-f0714e94a5d5&tpp=1

To push the print are out to 300mm x 300mm? Is scan area the same as print area?

Sorry for the long links, don't know why aliexpress does that.

Thanks,

3

3D Printers / Multiple Galvos

« on: January 19, 2018, 11:04:13 AM »

Hello,

I wasn't too sure that this topic was still achieve, but it seemed most relevant since it is about 3d printing that I have my query. I am just at the beginnings of understanding SLA as a 3d printing option, and the thought  of using your board to achieve this is exciting. However, a lot of the build areas that are possible across all SLA technologies, seems to be a little small, for what I am after, and I wanted to know whether it was possible to increase this using the configuration in the attached picture. Or am I just asking for a whole lot of pain? Any direction on this would be greatly appreciated.

Regards,

P.S On the drawing I now realise I spelt Galvos wrong, apologies