Hello all,
I am using a Sherline 3 axis mill with 3 servos, a xylotex controller and Indexer LPT from Ability Systems to send instructions to the motors. I am using the system in my laboratory as an automation platform. The mill moves a 96-well plate under a laser (Raman) probe every two minutes while a machine records a spectrum for each of the 96 samples. Right now I have a rather poorly syncing batch file running that uses dwell events to try to keep the movements of the mill in sync with the spectrometer. This doesn't work very well.
I would like to reconfigure the system to make the sync tighter. It seems to me that I could use a G-code sequence to move the platform and a suggestion was made to make the 'laser on' LED into a trigger for the mill movement. I can rig up a photodiode/phototransistor to generate a hi-lo signal that I can feed into the parallel port. I was thinking that some kind of stop/wait signal could be issued and the resume command would come from the change from hi to lo when the spectrometer finishes the data point and the light goes off. This triggers the movement to the next well. The spectrophotometer runs in a mode where it takes a spectrum for 2 minutes, waits for 15 seconds then starts the next spectrum.
I could have this programmed in a number of ways I suppose but I thought that if I did it using a program like Mach3 then I will also end up with a functioning 3 axis CNC machine. This would be handy for me to make parts for the lab. Very handy indeed.
So, what I am asking this forum is: Do you think the above concept is possible?
If it's possible, I'm then going to wonder if I have the time or patience to get everything wired up, Mach3 configured, and the sequence written in G-code.... I don't think I do.
I know that the following probably sounds a bit on the insane side, but because of constraints on my tine and my minimal knowledge of all things CNC, what I would ideally like to do is find someone that I could pay to help me set up this system. I can ship the computer, parallel card, motor power supply, controller board, the complete sherline mill, a sample well-plate, a paid license for Mach3, the phototransistor assembly, and any other necessary parts to put the system together. The spectrometer can be simulated with a flashlight. This person, for an appropriate fee, would assemble the parts, install and configure Mach3, and then write a file that accomplishes the automation process described above. Lastly, once I get the system back, this person could provide tech support for an hourly fee for both the automation process and also to get me up and running with making simple parts out of aluminum on the mill.
Boy, I am probably going to get flamed really bad for this post. Well, you gotta shoot to score....