Posts made by radbis

Hi everyone,
I am new to this forum and would like to introduce myself.
My name is Radek and I am from Poland. For a year I have been collecting parts and knowledge needed to build a laser cutting plotter and engraving equipment. At the moment I have several lasers and accessories for them. I also have steppers for the plotter and Raylase head for engraving.
I already have a bit of knowledge about cutting plotter. So, I will buy a DuetWIFI or I will make a simple controller for two steppers on TMC2660. If I make my own controller, the Control will be implemented from Beaglebone Black (BBB) along with a fast BeagleG code. But I think it can be cheaper to make it by myself. Because I do not need as many as five steppers and only two. Unless I get a discount from creators for example for helping with SLA
As for your conversation about SLA. I have a similar problem with my engraving head. It supports the industrial standard for XY2-100 lasers. I gathered some useful information. This is actually the fastest type of control for galvanometers. I have information about the protocol itself and the electronics needed to build. You can build in two ways: the first one is using the mentioned Beaglebone or using the Sitara processor itself, in your own solution. The Sitara processor used in the BBB but also in the Green and Blue versions has two very fast and independent from the main processor PRU executive units. They are enough to control galvanometers - even they are two times faster than we need in this case and only one PRU is needed. That's how colleagues from HALaser did. In turn, BBB for PRU was used for steppers in Replicape and other solutions. I do not mean here to advertise other solutions, because in my opinion the Duet is fantastic and priced okay. I am just referring to the SLA topic and looking for solutions for the processor that is fast enough to run galvanometers.
The second solution is using a different processor in the solution I found in the work of Chinese engineers, they used the STM32F107 processor. But probably we could do it on one DAC from the processor used in Duet. You only need to use one of the many RS-422 controllers to the electrical interface layer. The total cost of parts should be comparable, and maybe even lower than in the case of Duet.
@dc42: If you would be interested, I will send materials to priv or email. I would be also happy to cooperate in building this. What's true, my free time is terribly poor because I work as an IT security engineer in T-Mobile, but maybe some time I would find, because I really want to start the Raylase head, and I do not have too much to pay for a ready solution which is extremely expensive. HALaser which 270 to 500 Euros for richest version, is the cheapest I found.
There is one more solution - ILDA. They are used to control galvanometers at laser shows. There are quite a few open source solutions for electronics and software. However, it seems to me that the protocol used in ILDA is not suitable for 3D printing. The image from the laser is displayed all the time, is not scanning once to expose the resin liquid as in the XY2-100 protocol.
Sorry for my english
Regards