tb 6560 with marlin and corexy
Posted by aduy
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tb 6560 with marlin and corexy January 22, 2014 10:05PM |
Registered: 12 years ago Posts: 544 |
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Re: tb 6560 with marlin and corexy January 22, 2014 10:12PM |
Admin Registered: 12 years ago Posts: 1,063 |
there's a problem with marlin and those drivers the pulse width marlin send out is too short for them, i have a modified version of marlin which should work with the tb6560
should be able to download it here marlinfirmware-modified
Edited 1 time(s). Last edit at 01/22/2014 10:12PM by thejollygrimreaper.
should be able to download it here marlinfirmware-modified
Edited 1 time(s). Last edit at 01/22/2014 10:12PM by thejollygrimreaper.
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Re: tb 6560 with marlin and corexy January 22, 2014 10:32PM |
Registered: 13 years ago Posts: 1,797 |
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Re: tb 6560 with marlin and corexy January 23, 2014 12:49AM |
Registered: 12 years ago Posts: 544 |
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Re: tb 6560 with marlin and corexy January 23, 2014 01:15AM |
Registered: 13 years ago Posts: 1,797 |
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Re: tb 6560 with marlin and corexy January 23, 2014 01:32AM |
Registered: 12 years ago Posts: 544 |
Ive tried inverting them in the firmware but it does the same thing either way. I almost wonder if its using tristate logic and disconnected is enabled.
also im going to try and see if this [reprap.org] helps with the hissing and step skipping.
Edited 2 time(s). Last edit at 01/23/2014 01:45AM by aduy.
also im going to try and see if this [reprap.org] helps with the hissing and step skipping.
Edited 2 time(s). Last edit at 01/23/2014 01:45AM by aduy.
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Re: tb 6560 with marlin and corexy January 23, 2014 04:48PM |
Registered: 12 years ago Posts: 544 |
ok so i see one optocoupler and the other chip seems to be some sort of timing chip but i am not certain.
Edited 4 time(s). Last edit at 01/23/2014 04:52PM by aduy.
Edited 4 time(s). Last edit at 01/23/2014 04:52PM by aduy.
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Re: tb 6560 with marlin and corexy January 23, 2014 09:07PM |
Registered: 13 years ago Posts: 1,236 |
I think the other chip is a 2 channel opto, judging by the PCB tracks.
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What is Open Source?
What is Open Source Hardware?
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CC BY-NC is not an Open Source license
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Re: tb 6560 with marlin and corexy January 23, 2014 09:26PM |
Registered: 13 years ago Posts: 1,797 |
here is a copy of that opto coupler. it is indeed 2 in one package.
you could make them separate from reprap controller to test if motors move. change the enable state separately.
then also note that step pulse width needs to at least be 60us, unless opto coupler is removed from board.
Edited 1 time(s). Last edit at 01/23/2014 09:30PM by jamesdanielv.
you could make them separate from reprap controller to test if motors move. change the enable state separately.
then also note that step pulse width needs to at least be 60us, unless opto coupler is removed from board.
Edited 1 time(s). Last edit at 01/23/2014 09:30PM by jamesdanielv.
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Re: tb 6560 with marlin and corexy January 23, 2014 10:58PM |
Registered: 12 years ago Posts: 544 |
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Re: tb 6560 with marlin and corexy January 24, 2014 03:05AM |
Registered: 12 years ago Posts: 544 |
ah success! ok so for whatever reason disconnected on the enable pin means enable and i think anything else is disable. also once I bridged the optocouplers the 5v is no longer needed. maybe the +5v is actually the enable.
for whatever reason they are really very noisey no matter what settings I use. they are really strong though and the motors can push with a lot more force, maybe they work better with bigger motors or something but they are just a bit too noisy as is with my nema 17s.
Edited 1 time(s). Last edit at 01/24/2014 04:27AM by aduy.
for whatever reason they are really very noisey no matter what settings I use. they are really strong though and the motors can push with a lot more force, maybe they work better with bigger motors or something but they are just a bit too noisy as is with my nema 17s.
Edited 1 time(s). Last edit at 01/24/2014 04:27AM by aduy.
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Re: tb 6560 with marlin and corexy January 27, 2014 02:25AM |
Registered: 12 years ago Posts: 544 |
so I did get them to work, I simply unsoldered the optocouplers and used the inverters from a 74hc14 in their place, I think i might need to cut some traces and whatnot but im not sure exactly. they do work but only on the 20% torque setting otherwise i get a lot of hiss and jerky steps.
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