Tue 1 Sep 2009
I have been running into a problem when I am moving at really high IPM (inches per minute) using EMC2 Axis.
This image sums up the problem I was having: 
Axis EMC2 was rounding my corners. I wanted it to go to that spot and then move on to the next line of G-Code. My friend Paul and I did a little research. He remembered that there was something on the emc2 list about CV problems. Where emc2 would try to keep a constant velocity.
As we researched we found out that emc2 implements “Trajectory Control” using the G61 and G64 commands.
So to solve the “problem” I was having. I told my Gcode file to use G61 Exact Path Mode. It got rid of the rounded corners I did not want.
September 1st, 2009 at 1:47 pm
Are you running CNC? Interested in doing CNC, curious about your equipment.
and curious in general about your training. Like you I’m an intellecual tourist. I’m a half ass programer, (since 1972), a pilot, a chemist, interested in robotics and remote sensing, architecture and the perfect bagette..
Have a son who’s an engineering student at Ga Tech, struggling with chosing a major. He’s very proficient in computer programing, microcomputers, robotics and likes to tinker.
We have a 1/2 finished electric truck, couple of 1/2 built CNC routers and spare microcomputers lying around the house.
Suspect he’ll go robotics, i want him to do graduate school.
Maybe intern with someone? Any suggestions?
September 1st, 2009 at 8:09 pm
I am running CNC. Using emc2 which is a open source machine control software. It even has a bootable cd.
I am currently using a Fireball V90 from Probotix and a home built router I made from scratch.
I have no formal training in computers or electronics. I have learned everything I know on my own. With the help of books, websites, and really knowledgeable friends.
I have been a programmer since 1983. Starting with basic, then ‘C’. Then I started unix/linux system administration around 1993-94. Since then I’ve used just about every language of the procedural to OO types.
I hang out with The Robot Group in Austin, TX. I have participated in many Dorkbot functions, and a couple Maker Fairs.
Getting involved with a technology group like The Robot Group is really helpful to me. It encourages me to constantly expand my skill set by helping others with their projects or giving me the little pushes I need to complete my own.
Some of the best baguettes I have ever had were in Collioure France. I don’t know if the bread tastes better there or if it has something to do with the scenery. Either way, it would be worth the trip to find out.
September 15th, 2009 at 12:27 pm
I want a CNC, just because they’re so damn cool.
It’s like welding, I could do so much more if I could go from a drawing to a physical piece of wood/plastic.
My son’s problem is narrowing his major, he’s an excellent programmer, good in math and physics and loves more than anything to work with his hands. He’ll be fine, this is a great time to be a geek.
I really feel sorry for people who don’t understand science. It would be like being deaf and blind.