Anybody wants a stepper motor analyzer?
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@th0mpy said in Anybody wants a stepper motor analyzer?:
TI TMCS1101
and every site i search they are not avaible ;(
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Hi @Th0mpy,
i also have 5 boards here without sensors and would also be interested in the adapted code like @PCR .
P.S. what is the exact name of the TMCS1101? (TMCS1101A3UQDRQ1 or TMCS1101A4UQDRQ1 etc.)
P.S. Which jumpers do you think are still needed? Do you mean the connections at J1 + J2?
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@rjenkinsgb said in Anybody wants a stepper motor analyzer?:
The Broadcom ACHS-7191 appears to be pin compatible and available
The stock board assumes current sensors that operates on 3.3V. The ACHS-7191 seems to require 5V so will need some design changes.
Have you seen the recent post here that mentioned the TI TMCS1101 ?
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@th0mpy said in Anybody wants a stepper motor analyzer?:
and made a couple modifications to the board. should more sensors be needed in the future.
Can you release these modifications? It will be useful if we will 'standardize' the configuration such that we can share firmware between boards.
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@zapta Yep, I'll reach out to you separately (this weekend) and go over my changes.
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@dogma2k I had to re-use some of the code for the jumper. You can pull the option pin high, low, or float to get an option. I re-used the high option to add the TMCS1101. I did update the board to add 2 more option pins this way you could conceivably have up to 27 options for sensors, but the code hasn't been completely updated.
This is the one I'm using: TMCS1101A2BQDRQ1 which now when I look doesn't show stock until January
I still have a few and have 10 more boards coming so my next batch will likely hit sometime in January.Usually the team that scores the most points wins the game.
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@th0mpy There is one other TMCS1101 which should work as well, the only difference is the 0A voltage, which doesn't matter since the code has a "reset zero" option. I'll test it out and report back. I have a few coming next week, as well I will get the update code posted somewhere after I coordinate with @zapta
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@zapta said in Anybody wants a stepper motor analyzer?:
Have you seen the recent post here that mentioned the TI TMCS1101 ?
Just now, great find!
Mouser have a few TMCS1101A4BQDT in stock, which are the same symmetrical sense range with 400mV per amp output, as the original ACS70331EOLCTR-2P5B3
I've just ordered some.
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@rjenkinsgb That's cool, I hadn't seen that one when I was searching. If I did it wasn't in stock.
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Hey all, just a quick update. I ran out of connectors, if you still want an analyzer I still have 3 but won't have any connectors to make jumpers. I have another batch on the way that I should see in January.
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@th0mpy said in Anybody wants a stepper motor analyzer?:
that I should see in January.
...which year?
It's frightening to see the supply-chains crash. Experts say, the shortage will last till end '22.... -
@o_lampe It's crazy. The original sensors that I used, went away at a blink, then thee ones that @rjenkinsgb pointed out just magically appeared.. It's a crap shoot really.
The boards that I've been having made are pretty reliable, they have about a 3 week turnaround and it's stayed pretty consistent.
That said, I am working to publish my updates to the analyzer, I worked with @zapta and I will re-host my fork when I get it cleaned up. The benefit here is that we can start adding a lot more options for sensors, without too much rework in the code, we can just add the sensor specs and set the solder jumper as necessary. I'm hoping that we can eventually get to a point where we can reliably source just one sensor and standardize that. In the meantime we should be able to really get some good testing on whatever the market has available.
Usually the team that scores the most points wins the game.
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@th0mpy said in Anybody wants a stepper motor analyzer?:
and set the solder jumper
Just a minor idea, If you will use a standard footprint and zero ohms resistors, SMD services such as JLCPCB will be able to populate them as well.
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@zapta Fair point
I did it with solder jumpers to make it easier if anyone wanted to change things in the future. I have to touch each one anyway, and it only takes 2 seconds to do, so for now I'm good with it. -
@th0mpy said in Anybody wants a stepper motor analyzer?:
In the meantime we should be able to really get some good testing on whatever the market has available.
Right! There's a good side in everything....the suppliers can sell their dust-collectors (for a fortune
) and we get a greater knowledge -
Do the jumpers come here? Or do you need another board
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@dogma2k Which chip are you going to use?
Usually the team that scores the most points wins the game.
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Just received & fitted the current sensor ICs from Mouser.
I still have to install the programming stuff, but once I have that set up and assuming the boards work OK, I'll let some of the spare current sensors & PCBs go at cost, if anyone in the UK / Europe wants them.
