Thanks!
You’re right, due to the pulley ratios the opposite counter force is increasing the more chain is out and when the chain is completely taken in,the counterforce is almost zero.
I’m waiting for some ball bearing pulleys and I have to stiffen up my motor arms to be able to benefit from the whole setup. More news in about two weeks. Maybe by then the new calibration process has made this system obsolete…
a bigger problem for now is my jerky left motor. I have to keep my feed rate low because of it and even with my Dewalt router at its slowest speed I’m burning up bits way too fast…
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now that we have the new calibration and benchmark score, test with and without
the counter-force system. We can armchair quarterback and talk theory all day,
but the bottom line is if it makes things better or not.
David Lang
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If you have a chance, see if the new releases today help with that. There was a small tweak to the PID values which I hope causes that to go away. If not let me know and we can try some other things.
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the newest release also tweaks the PID settings, which may address your jerky
left motor.
Thank you for the reply. I am having major calibration problems with the
triangular linkage. I have done the cal numerous times and the sled is
always about 12" below the center of the plywood. When I did the original
cal with the quadrilateral linkage that came with the kit it was very close
and the cal was close. You mentioned on the forum that maybe some of the
old cal data was affecting the cal and to delete the settings form the .ini
file. I have no idea where that is located. I am at a dead end and will try
putting the quadrilateral connections back.
Thanks for any help you can give me.
Another thought. Can I just delete the GC program and start over.
after you do the calibration, the sled is not at the center, you have to return
to home to get it to the center.
after you do the calibration, move the sled around manually and confirm that the
links move freely and don’t stick at any point.
the chain and the arms should always be parallel, with the chain pointing at the
bit
If using Windows 10, its under C:\Users[whatever_your_username_is]\groundcontrol.ini
Under Actions, there’s a “Return to Center” button. Try that (the home may not be set for 0,0).
Have you had any more time to play with the system? I was thinking about a similar setup last night. I see you went with a 3:2 at the bungee and chain connection. I was thinking I would do a 2:2, but was wondering if you had an insight into the ratios.
Thanks
Hello Keith,
No,not yet, still waiting for parts.
For the system to work it needs to run really smooth.
The 3 to 2 ratio appeals more to me as I explained earlier (maybe even 4 to 2)
Thanks, I figured that you had a reason for the ratio.
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