Step-Direction vs Analog Command vs CW/CCW Signals

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13 Sep 2019 00:40 #145008 by bevins
You become really good friends with HalScope whilst tuning........
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13 Sep 2019 00:59 #145009 by thefabricator03
Thanks bevins,

I guess at that price point you cant be picky, I have similar pricing for other china brand servos, I will see what I negotiate with them.

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13 Sep 2019 01:03 - 13 Sep 2019 01:07 #145010 by bevins

thefabricator03 wrote: Thanks bevins,

I guess at that price point you cant be picky, I have similar pricing for other china brand servos, I will see what I negotiate with them.


We could run it at 2100 inches per minute. I think that was 800 ipm or something like that in the video.
It is loud because of the rack and pinion.
We had a 10:1 planetary gearbox on the two Y motors and the X motor. THe Z just has a brake.

Last edit: 13 Sep 2019 01:07 by bevins.
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13 Sep 2019 03:31 #145025 by rodw

bevins wrote: It is loud because of the rack and pinion.

Just a good Microphone!

And it seems a very coarse straight rack at that. I used one straight rack on X and 2 helical on the Y and I will never use a noisy straight rack again!

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13 Sep 2019 09:55 #145041 by tommylight

thefabricator03 wrote:

tommylight wrote: 9 Axis, much more joints, i think, in version 2.8 and 2.9 of Linuxcnc .


Yeah thats right 9 axises, and each axis can be comprised of multiple joints.

Tom, What are your thoughts on a 6 axis robot retrofit with Linuxcnc? For this robot there really is no other option. It was made in 1991 and the ERC contoller is very much antiquated.

I would not thing to much about it, just do it.
There are several success stories around, and from what i read the only tricky part is getting the kinematics right, meaning the angles, lengths, and how they interact with each other.
CAM might be a bigger issue.
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13 Sep 2019 10:04 - 13 Sep 2019 10:04 #145042 by thefabricator03

tommylight wrote: CAM might be a bigger issue.


Na I have CAM sorted,

Between Big Johns Teach-in.py script and this robodk.com/index
Last edit: 13 Sep 2019 10:04 by thefabricator03.
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13 Sep 2019 11:19 #145049 by tommylight

thefabricator03 wrote:

tommylight wrote: CAM might be a bigger issue.


Na I have CAM sorted,

Between Big Johns Teach-in.py script and this robodk.com/index


Nice.

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17 Oct 2019 18:56 #148140 by JR1050
There are different types of Yaskawa encoders, Id pull the manual up for the motor, see what was offered and see what you have. In my experience, even the older absolute encoders still used A A/ B B/ and a marker channel and still read incremental , they kept track of where they were with battery backed memory and reported to the controller serially. Yaskawa got out of the control business 17 years ago, my guess is you can re use them. The drives may or may not be analog, there was another post about the AC drives on an I80 control using pwm signals.

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