On Tue, 12 Mar 2019, Gene Heskett wrote:

Date: Tue, 12 Mar 2019 06:12:23 -0400
From: Gene Heskett <ghesk...@shentel.net>
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] More for PCW

Greetings Peter;

The 7i76d has a spindle encoder, so I'm looking for suggestions as to how
to drive it.

The ER11 chuck has doubleD flats, but placing ATS-667's there precludes
using a wrench to tighten a tool, so thats out.

The top/rear of the ER11 has a slinger disk around 1.25" in diameter,
currently ummolested by any markings, located about 1/4" above the
doubleD flats. Has anyone pulled the collet, and made cuts to drive
ATS-667's, which would need two for balance symmetry, effectively making
a doubleD out of the slinger which could then be sensed with the
ATS-667's. Or perhaps painted so that photo-reflective sensors, if fast
enough, could read the paint. At 24k revs, what kind of paint wouldn't
fly off?

There is I think, an output available from the vfd too but I've no clue
if its needing isolation or with the poor docs we have for this vfd, how
to enable  it. I have not noted an ac voltage on the spindle-+ or speed
wires, so the isolation may be in the vfd.

But two problems there, first being the top of the 8 bit value of the
first 4 inputs being around 38 volts, considerable higher than I would
expect from the vfd, and 2, I've just read thru the docs for the 7i76,
hostmot2, hm2_pci, and sserriel and setsseriel, without finding out how
to enable mode 1 so the first 4 inputs become analog enabled. Nor how
much of a speed penalty there might be if those modes are enabled.

So some guidance is needed. I think it would be nice if the pyvcp tach
worked, which it isn't now.

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

To enable mode 1 or 2 you add this token to the loadrt hm2_pci line:


This is in the hostmot2 manual page

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Peter Wallace
Mesa Electronics

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