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Post by hexpod on May 9, 2017 22:11:44 GMT
in order to get 12 bit PWM do I have to soldier a 6 pins socket on the board and connect the tecnicmotors following the diagram below?? cheers
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Post by tronicgr on May 11, 2017 11:05:54 GMT
Hi Ignacy,
You may want to solder the extra header on the 12bit output for testing. As you have on the photo is correct.
The soldering the pads is for more permanent solution and not easy to switch back and forth between 8bit and 12bit resolutions.
Also before soldering the pads tou need to cut the tiny trace that exists there first.
Thanks Thanos
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Post by hexpod on May 11, 2017 11:59:23 GMT
Hi Ignacy, You may want to solder the extra header on the 12bit output for testing. As you have on the photo is correct. The soldering the pads is for more permanent solution and not easy to switch back and forth between 8bit and 12bit resolutions. Also before soldering the pads tou need to cut the tiny trace that exists there first. Thanks Thanos Tell me, there is no way to route the 12bit output to the existing 8 bit pins with the firmware? Cheers.
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Post by hexpod on May 19, 2017 10:07:41 GMT
Also before soldering the pads tou need to cut the tiny trace that exists there first. As you have a huge experience in such stuff, its pitty you did not sent to me the board "PWM 12bit ready"
I would need help, maybe a small video tutorial, because I am not getting exactly where to solder and what has to be cutted.
Also could you explain why you've left the 8bit PWM in the new designed board? Can the fact to go higher than the ridiculous 256 steps resolution cause issues?
Thanks All the best - I
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Post by tronicgr on May 20, 2017 17:52:51 GMT
Also before soldering the pads tou need to cut the tiny trace that exists there first. As you have a huge experience in such stuff, its pitty you did not sent to me the board "PWM 12bit ready"
I would need help, maybe a small video tutorial, because I am not getting exactly where to solder and what has to be cutted.
Also could you explain why you've left the 8bit PWM in the new designed board? Can the fact to go higher than the ridiculous 256 steps resolution cause issues?
Thanks All the best - I
Ok, here is a video that explains what you need to do. youtu.be/2aFChSoyuKgI left the 8bit resolution for legacy reasons, and compatibility with older amc1280usb boards. The traces solution was introduced as an easy way to redirect the 12bit pwm to normal Pwm output header if the application used requires it. Most PWM drives for DC motors are completely fine using 8bit pwm and using 12bit pwm on them might not show much improvement ad these systems are not using the pwm same way as clearpath motors use it to digitaly set the speed. Thanks Thanos
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Post by tronicgr on May 23, 2017 14:35:45 GMT
Tested the clearpath motor at 12bit pwm. Works great. Used the 12bit SSI sensor to set speed / direction. I noticed the max motor speed setting is broken in 12bit pwm as well. I need to dig into the code to see why. youtu.be/SBEzDLOg9mMThanks Thanos
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Post by hexpod on May 24, 2017 8:20:21 GMT
Tested the clearpath motor at 12bit pwm. Works great. Used the 12bit SSI sensor to set speed / direction. I noticed the max motor speed setting is broken in 12bit pwm as well. I need to dig into the code to see why. youtu.be/SBEzDLOg9mMThanks Thanos
Thank you very much for detailed info concerning the PWM. That helps! How far are you in the process to interface 14 bit sensors I’ve sent you in November? As I can’t mount my sensors on the motor axis, it’s a big hassle for me to design a working attachment for those bearing less 12 bits. Were you able to get a reasonable signal from those 14 bits?? If only it’s possible to make them work with the board, I would prefer to stay analog and wait until you release the firmware update, but not forever. I understand the back-compatibility you want to provide each time for “old” hardware and software, makes your firmware more and more complicated. I know It can be a time-consuming process. Maybe it would be faster to make a separate firmware version. You decide. I can wait another couple of month but I need to know you are still in. All the best Cheers – I.
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