I am trying to control 30 servos with Arduino Mega 2560 but it seems the servos only twitch as I slide through 0-180 to mega write, and I tried to connect only one servo to different digital pins in several times, the results are the same.
Andy I sent you a friends request. I am emanuel From the workshop at
TEXFAB. I am having a issue with the steppers and was wondering if you could take a look at the Grasshopper build that i have used from the library samples.
Thanks Andy. That cleared up a lot and reinforces what David explained. Had the same thought about handling the high frequency data on Arduino and sending data much less frequency to Grasshopper. Sounds like a challenge that will take some time to figure out.
Hey Andy. Have much enjoyed your gcode definitions in the past and have started using firefly, another great tool. I am trying to do something that sounds like it may have a technical roadblock. I want to read pulse output from an arduino that is running the gcode interpreter GRBL. I use grbl with my diy cnc but I am trying to cobble together a simulator for testing and understanding the firmware and gcode programs I use. The arduino pumps out pulses that are only 5-50 microseconds wide. I think I can set them as big as 255 microseconds wide. I can read the output at 1ms intervals using firefly but obviously drop a lot of information. Do you think there is a way to successfully read those pulses in through firefly?
i've hooked up a dc motor with an h bridge circuit and i have been able to control the rotation and speed so far through Arduino code. Now i wanted to do the same through Firefly, but it keeps working with the Arduino sketch ignoring the current values i am sending through Firefly, shouldn't the Arduino sketch be overwritten? However that was not the case with servos..
I really appreciate the quick response. My issue here is speed. I took a look at AccelStepper.h, which mentions that speeds above 1000 steps/sec are unreliable...so just to test it, I tried setting the stepper speed to 1000 on the quadstepper component. The steppers I'm using are vextas: http://www.interinar.com/vexta-px243m-03aa.html, which have a step angle of .9. So a speed of 1000 should give me an rps of 2.5, but when I set the quadstepper to a speed of 1000, the actual rps I'm getting is really slow, its more like .2 rps.
Thanks again for your help today with the capacitors. I have another question regarding quadsteppers and I'm not sure which forum for Firefly is current. Is the most recent forum at firefly.squarespace.com? I had trouble finding a discussion part on the new web site.
Anyway, I posted a question there about increasing stepper speeds with the Quadstepper driver. I'm trying to attach a dremel to a reprap to turn it into a router. The quadstepper works great, but I just need some more juice. Thanks for any help.
Comments
Thank you Andy, I completely overlooked the setting... Everything is working now. Thanks again for bearing with me.
Hello Andy,
First of all, thank you for your great work.
I am trying to control 30 servos with Arduino Mega 2560 but it seems the servos only twitch as I slide through 0-180 to mega write, and I tried to connect only one servo to different digital pins in several times, the results are the same.
I tested with Uno and all 9 servos worked under the same set up, so I imagined there might be something wrong with the firmatta, and I came across this post in 2011: http://fireflylabs.squarespace.com/discussions/post/1540044
the Firefly version I'm using is 1.0.0.70 64 bit, does it cover for the "buffer size" and "baud width" issues that you mentioned on the post?
I am using Rhino 5.0 and the grasshopper version is april-04 2014 build 0.9.0075. the Arduino IDE version is 1.6.5
Thank you for your time.
Hello ,
Andy I sent you a friends request. I am emanuel From the workshop at
TEXFAB. I am having a issue with the steppers and was wondering if you could take a look at the Grasshopper build that i have used from the library samples.
Thank You
Manny Ferro
Thanks Andy. That cleared up a lot and reinforces what David explained. Had the same thought about handling the high frequency data on Arduino and sending data much less frequency to Grasshopper. Sounds like a challenge that will take some time to figure out.
Hey Andy. Have much enjoyed your gcode definitions in the past and have started using firefly, another great tool. I am trying to do something that sounds like it may have a technical roadblock. I want to read pulse output from an arduino that is running the gcode interpreter GRBL. I use grbl with my diy cnc but I am trying to cobble together a simulator for testing and understanding the firmware and gcode programs I use. The arduino pumps out pulses that are only 5-50 microseconds wide. I think I can set them as big as 255 microseconds wide. I can read the output at 1ms intervals using firefly but obviously drop a lot of information. Do you think there is a way to successfully read those pulses in through firefly?
Hey Andy,
many thanks for your great plug-in.
I am trying to start using Kinect in Grasshopper and I am wondering if you can provide me with some tutorials/hints for beginners?
Many Thanks
Hi Andy,
i've hooked up a dc motor with an h bridge circuit and i have been able to control the rotation and speed so far through Arduino code. Now i wanted to do the same through Firefly, but it keeps working with the Arduino sketch ignoring the current values i am sending through Firefly, shouldn't the Arduino sketch be overwritten? However that was not the case with servos..
Should i reset the Arduino?
Thank you
Andy,
FYI, I just hooked up a different type of stepper motor (http://robotics.reefat.com/wp-content/uploads/2008/08/PF35T-48L4.pdf) and the speed is much better. This must be a hardware issue I'll have to look at. Sorry for the trouble.
Erick
Andy,
I really appreciate the quick response. My issue here is speed. I took a look at AccelStepper.h, which mentions that speeds above 1000 steps/sec are unreliable...so just to test it, I tried setting the stepper speed to 1000 on the quadstepper component. The steppers I'm using are vextas: http://www.interinar.com/vexta-px243m-03aa.html, which have a step angle of .9. So a speed of 1000 should give me an rps of 2.5, but when I set the quadstepper to a speed of 1000, the actual rps I'm getting is really slow, its more like .2 rps.
Andy,
Thanks again for your help today with the capacitors. I have another question regarding quadsteppers and I'm not sure which forum for Firefly is current. Is the most recent forum at firefly.squarespace.com? I had trouble finding a discussion part on the new web site.
Anyway, I posted a question there about increasing stepper speeds with the Quadstepper driver. I'm trying to attach a dremel to a reprap to turn it into a router. The quadstepper works great, but I just need some more juice. Thanks for any help.
-Erick
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