Questions: Mesa 7I92 Leadshine MX4660 4-Axis Step
Can I use the Hostmot2 file 7i92_MX3660x2D.bit for the MX4660?
Does stepconf work for the above combination?
For the 5V to power the 7i92M card, I'm using a USB "power stealer" cable from the Intel NUC's USB port since the DC power supply for powering the Leadshine/Steppers only supplies 36V DC. Is there a better alternative?
Which getting started resources (if any) are available? Anything else I should be aware of as I'm starting out?
Thanks.
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Can I use the Hostmot2 file 7i92_MX3660x2D.bit for the MX4660?
If you look at the .pin file you can check to see if the pin allocations match.
Does stepconf work for the above combination?
No. Stepconf is only for parallel port configs. Pncconf might get you close, but you might have to pretend it is something else, then hand-edit the HAL file. (mainly find and replace).
For the 5V to power the 7i92M card, I'm using a USB "power stealer" cable from the Intel NUC's USB port since the DC power supply for powering the Leadshine/Steppers only supplies 36V DC. Is there a better alternative?.
That's probably as good a way as any. It keeps power ground and logic ground separate too. An alternative would be to use a DC-DC converter from the 35V supply, but I don't see any good reason to prefer that.
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If you look at the .pin file you can check to see if the pin allocations match.
Looks like the MX3660 bitfile supports upto 3 steppers, but the MX4660 supports up to 4. So although the pins match for the first three steppers,
there is no support for the fourth.
Is this something I can fix via configuration or do I need to get a new bit file from Mesa?
Output of "sudo mesaflash --device 7i92 --readhmid"
Relevant page from MX4660 spec (www.leadshine.com/UploadFile/Down/MX4660hm_V1.1.pdf)
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pncconf is only to get you started , once you have a config , used a text editor and hand edit from then on
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is a basic example hal/ini file set for the 7I92
You cal also run pncconf for a 5i25/probrfx2 setup and edit the resulting files
(changing the card name to 7i92 and the hostmot2 config line to include the 7I92s ip address)
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I was confused for a while by the presence of a step pin for channel 3. But that is set up for a charge-pump.Looks like the MX3660 bitfile supports upto 3 steppers, but the MX4660 supports up to 4. So although the pins match for the first three steppers,
there is no support for the fourth.
Is this something I can fix via configuration or do I need to get a new bit file from Mesa?
If you are feeling adventurous it is possible to make your own bitfiles.
wiki.linuxcnc.org/cgi-bin/wiki.pl?Editing_MESA_Bitfiles
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freeby.mesanet.com/7i92_mx4660.zip
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Thanks for all the help.
On to the next phase. Can I test the stepper outputs of the 7i92 (watching the step/dir pins on a logic analyser, for example) without actually connecting the MX4660? Say if I use the jog controls I should be able to see the corresponding activity on the 7i92's output parallel port, correct?
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Also the sample config has no limit switch or or estop logic so does not depend
on any input states to run.
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