Lichaun LCDA357H setup

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01 Feb 2021 22:30 #197339 by Pala2020
Replied by Pala2020 on topic Lichaun LCDA357H setup

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01 Feb 2021 23:05 #197345 by tommylight
Replied by tommylight on topic Lichaun LCDA357H setup
@Pala2020,
I am confused, that is a Mach3 control board so chances are it will not work with LinuxCNC.
LinuxCNC compatible boards with ethernet are made by Mesa, there are several types of them, like 7i92 (similar to what you have), 7i96, 7i76E, etc.
Maybe there are other boards that do work with LinuxCNC through ethernet, but i am not aware of them.
Did you test that setup with Mach3?

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01 Feb 2021 23:42 #197349 by Pala2020
Replied by Pala2020 on topic Lichaun LCDA357H setup
thanks for answer.
my problem is the same of the other guys.
when i tray to move the stepper in close loop the driver send a alarm (3 flash)
i know this is a Linux forum.
But here is the only forum who have the answer i am looking for.
i don't know if the problem is the encoder wiring????or something more.
i really appreciate if you can help my to solve the problem.
Thank you very much for your help.

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02 Feb 2021 00:30 #197359 by tommylight
Replied by tommylight on topic Lichaun LCDA357H setup

when i tray to move the stepper in close loop the driver send a alarm (3 flash)

That sounds like incorrect wiring of the encoder or motor wires are set for reverse spinning, so try swapping just 2 of the motor wires.

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02 Feb 2021 01:19 #197366 by Pala2020
Replied by Pala2020 on topic Lichaun LCDA357H setup
You are right tommylight.
That was the problem..............Now everything is OK.
Thank for your Help..... I didn't realize the direction was the problem...... Now i can continue with my project
The following user(s) said Thank You: tommylight

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02 Feb 2021 09:52 #197397 by tommylight
Replied by tommylight on topic Lichaun LCDA357H setup
Nice, you are welcomed, always.

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02 Aug 2021 06:16 - 03 Aug 2021 13:37 #216665 by tjtr33
Replied by tjtr33 on topic Lichaun LCDA357H setup
I got the 3 blink error just now (01AUG2021) after at least 1/2 hour runtime.
But i hooked up a thermometer on motor body and saw 57degC.
I'd like to reduce the current but thats a function of a windows .exe
so that will be done later.
Yesterday I ran for a few hours without problem.
I at least have to wait for the cores to cool down and add fans
( motors in test rig with no load nor attached to any heatsinking frame ).
I have the swx6 set to closed loop stepping.
I use tie wraps on motor shaft and magic marker spots on motor to verify no lloss of steps.
(even with the swx6 set to closed loop.. )

tomp

ps using google translate
english  open loop -> simplified chinese 开环
so you can tell sw6 ON (开环 )  means OPEN LOOP mode
and swx 6 OFF (闭环 ) means Closed loop ( 1st of 2 chars is different )
my swxs are all closed  ( 1/4 uStep, motor direction normal?, closed loop,)

edit 4aug2021
I now have 2383mm/min with Gen Hesket & PCW's suggestion of 20000 for setup and hold terms.
My values were not small before, I had 50000 ! ( thats the default case for the allwincnc branch of lcnc for orange pi's. )
I also lowered the step and space from 5000 to 3000. I am not yet happy because the motors are at 55degC
with no load, and only 100 acceleration. The default 200 accell gets me the 3 blink err soon after first dir change.
This is now 21khz setp rate and 1588 rpm. Not as high as hoped for but stable. The test is _1000_ repeats of +/-80mm
motion at 2383 m/min. That test has now run 3 times w/o errors ( my ears ache !)
If i change my screws from 1.5pitch to 4, i can have 6m/min
But that's a Catch-22 , its easier to change that if I had a cnc machine ;-)
thx tomp
Last edit: 03 Aug 2021 13:37 by tjtr33. Reason: typo, update

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28 Jul 2022 08:25 - 28 Jul 2022 08:39 #248515 by Samuelx
Replied by Samuelx on topic Lichaun LCDA357H setup
Got this image from china, its LCDA357H specs, What does this tell you. Can you figure out:
Step time  (suggest bigger then 4us)
Step space
Direction Hold
direction setup

Steps on was default falling edge. 
   

edit. i got message that "step time: suggest bigger then 4us"
Attachments:
Last edit: 28 Jul 2022 08:39 by Samuelx.

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28 Jul 2022 15:12 - 28 Jul 2022 15:13 #248548 by Todd Zuercher
Just remember that the times listed in manuals are minimum times for detection. It is often a good practice to double them, when setting up an actual configuration. However the only meaningful time in that illustration is Direction Setup Time of 5us. (Also a setup time for Enable which Linuxcnc doesn't have a setting for.)
Last edit: 28 Jul 2022 15:13 by Todd Zuercher.

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