--- In DynoMotion@yahoogroups.com, Michael Rosenfield <mrosenfield@...> wrote:
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> FWIW, USDigital has little converter boards to convert single-ended encoders to differential drive. If memory serves, they are about $14 each.
> Michael Rosenfield
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> To: DynoMotion@yahoogroups.com
> From: darrengladysz@...
> Date: Fri, 30 Aug 2013 15:52:52 +0000
> Subject: [DynoMotion] Re: Encoder wiring and command output
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> Hi Tom,
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> Thanks for the info. I will re-examine digital drives :) or look at retrofitting tachs on some of my motors - I have about a dozen dc motors but none with tachs :(.
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> The 320 is nice but the encoders are single ended.
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> Thanks for the quick response.
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> Darren
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> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
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> > Hi Darren,
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> > It is possible to have some axes analog and some step/direction. The Kanalog connections to KFLOP consume the default step/dir outputs from KFLOP but there are two ways to still use step/dir signals from KFLOP with Kanalog. If you don't need the differential inputs on Kanalog JP2 you can disconnect KFLOP JP5 from Kanalog and use those step/dir outputs.  Or KFLOP's step/dir outputs can be multiplexed to KFLOP JP4 and JP6. See:
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> > http://dynomotion.com/Help/StepAndDirection/StepAndDir.htm
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> > I think you can parallel the encoder inputs on Kanalog and a drive. But it may make wiring, grounding and shielding a bit messy and open more possibilities for noise problems. Kanalog has weak termination to make this possible. If the drive has strong termination then the drive should probably be at the end of the chain.
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> > KFLOP doesn't provide the direction setup time for that linked drive. The spec requires at least 5us and KFLOP only provides a max of 4us. The 0.5V to 4.5V requirements would also be out of specification. Most likely it would work but I wouldn't recommend operating out of specifications.Â
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> > Gecko's G320X might be another option.
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> > HTH
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> > Regards
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> > TK
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> > ________________________________
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> > From: darrengladysz <darrengladysz@>
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> > To: DynoMotion@yahoogroups.com
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> > Sent: Friday, August 30, 2013 12:29 AM
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> > Subject: [DynoMotion] Encoder wiring and command output
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> > Â
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> > Hi Tom,
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> > I have a few questions about adding a 4th axis to my mill.
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> > Can kflop support both +-10v signal and step and direction simultaneously? I am
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> > only using 3 dac outputs and am looking at adding a dc drive that takes encoder
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> > inputs but requires step and direction output.
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> > Also, for encoders. Can you parallel wire encoders so that they output the
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> > signals of the A and B phases to both the drive and kflop or would this cause an
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> > issue. My motor only has 1 encoder but I would like to have closed loop to both
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> > the drive and kflop. I would not parallel the 5v and common signal and would
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> > make sure the controller and drive share a common ground.
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> > I am looking for a reasonably priced dc drive that uses encoder feedback (most
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> > of the amc use tach feedback) and find that you need to go to the higher priced
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> > digital drives to get this so I was looking into the following drive:
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> > http://www.ebay.ca/itm/New-Leadshine-DCS810-Digital-DC-Brush-Servo-Drive-80VDC-2\
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> > 0A-/251253824945?pt=LH_DefaultDomain_0&hash=item3a7fe51db1
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> > It uses step direction instead of +-10v with no fault output but this is only
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> > for a rotary table.
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> > Thanks.
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> > Darren
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