Mesa 7i97

mosoeng
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4 years 10 months ago #228547 by mosoeng

Replied by mosoeng on topic Mesa 7i97

Sorry I wrote that wrong, its the other way round.
24v is on across ENA+ to ENA- but when I press F1 then F2 the 24v drops (no voltage across ENAs.)

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tommylight
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4 years 10 months ago #228552 by tommylight

Replied by tommylight on topic Mesa 7i97

That should be correct behavior.

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mosoeng
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4 years 10 months ago #228623 by mosoeng

Replied by mosoeng on topic Mesa 7i97

Still cant get this to work, I can enable the drive by shorting between OUT0- and OUT0+ on TB5 i/o.
I am getting close to giving up on this, is there anyone in UK SE of London who could have a look at this for me?

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PCW
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4 years 10 months ago #228628 by PCW

Replied by PCW on topic Mesa 7i97

Are you saying that when F2 is pressed and the voltage across ENA+ and ENA-
drops from 24V to near 0V, the drive is not enabled? (and LinuxCNC has not dropped
out of the machine_on state due to say a following error)

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mosoeng
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4 years 10 months ago #228630 by mosoeng

Replied by mosoeng on topic Mesa 7i97

When I press F2 (machine on state), the voltage drops from 24v to 0V on ENA+ and ENA-.on TB3, (there is 24v on the TB5 OUT0- OUT0+)
Linuxcnc at this stage is in machine_on state, then when I try to jog Z axis we get the following error after 15 seconds. The drive never enables dont get the run on led display.

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PCW
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4 years 10 months ago #228632 by PCW

Replied by PCW on topic Mesa 7i97

What does OUT0 do? I thought the enables were wired to ENAN+ and ENAN-

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mosoeng
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4 years 10 months ago #228637 by mosoeng

Replied by mosoeng on topic Mesa 7i97

I found out that if i short out OUT0- to OUT0+ I can enable the Z Servo drive
Might not have anything to do with what we are talking about, or it might be lol.
If u look at the photo of the 7i97 I uploaded there is abunch of blue wires on the TB5

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PCW
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4 years 10 months ago #228638 by PCW

Replied by PCW on topic Mesa 7i97

Not sure what advice to give without an accurate description of the wiring

You would expect

ENA0+- --> X Drive enable
ENA1+- --> Y Drive enable
ENA2+- --> Z Drive enable

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mosoeng
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4 years 10 months ago #228639 by mosoeng

Replied by mosoeng on topic Mesa 7i97

yes thats how its wired from TB3

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PCW
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4 years 10 months ago #228641 by PCW

Replied by PCW on topic Mesa 7i97

At this point I have my doubts especially if OUT0 enables a drive...

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