7i90 questions

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16 Jun 2017 17:05 #94601 by JR1050
JR1050 replied the topic: 7i90 questions
The encoder works, it counts. It seems ,that axis's have to be homed in order, if you skip homing on one , the next one doesnt seem to want to search for home. Ive been trying to solve this for a while and Ive tried several different ini configs. In other machines i have done, i always put the mpg and spindle after any axis that needs to be homed, so it stands to reason if i have an encoder on joint 0, it has to have a home sequence before it will go to joint 1. Ill just put the linear axis on joint 0 ( it should then search for home), and ill use the encoder for joint 1 for the rotary position, as it doesnt need to be homed, much like a mpg or spindle Thanks, i think we will solve the problem. The new rpspi driver seems to work pretty good.
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16 Jun 2017 18:25 #94615 by Todd Zuercher
Todd Zuercher replied the topic: 7i90 questions
I still don't understand why the encoder needs to be assigned to an axis or joint. Just read the encoder and otherwise leave it alone.
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16 Jun 2017 19:57 #94624 by JR1050
JR1050 replied the topic: 7i90 questions
It shouldnt have to be assigned to a joint and I didnt have it assigned to anything and it reads as it should.
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05 Sep 2017 21:33 #98549 by JR1050
JR1050 replied the topic: 7i90 questions
Pcw,

I'm going to try to run a hardinge large with the pi/7i90 setup. Can you make me a set of bit files for both spi and parallel with the following
4 encoders
4 pwms
Smart serial
The machine will have two axis of movement, spindle and hand wheel . I believe that should cover it . Thanks. My employer abandoned the above setup in favor of a standard plc. In the end we got it all working and it worked well. They have yet to get the the machine working with the plc...
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06 Sep 2017 00:24 #98560 by andypugh
andypugh replied the topic: 7i90 questions

JR1050 wrote: Pcw,

I'm going to try to run a hardinge large with the pi/7i90 setup..


Lathe?

Gene Heskett is trying to use that combination. My impression is that it isn't that successful.
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06 Sep 2017 03:36 #98568 by PCW
PCW replied the topic: 7i90 questions
What pinout/daughtercards?
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06 Sep 2017 12:52 #98577 by JR1050
JR1050 replied the topic: 7i90 questions
7i33 for encoders
7i44 for the smart serial


Id be curious to see Genes set up. I built a semi robotic conveyor controlled by the same pi/7i90 combo with steppers, a vfd, ssi, and when i finally got a good good hm2 driver for the spi, it worked well. Its an experiment, The lathe already is running with a 5i20 and has been for years. I have a second hnc, if it works , the whole thing will go on the second machine which has yaskawa ac servos, if the pi proves incapable, then ill run the 7i90 thru the parallel port of an x86 mother board. Time will tell.
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07 Sep 2017 21:10 #98641 by PCW
PCW replied the topic: 7i90 questions
Started to make these and found out they are already there ( svss8_8 is for 1 or 2 7I33s and 1 7I44 )
The bitfiles for EPP, serial, and SPI are in the distribution zipfile
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