Servo drives costing 22 euros for 2 motors

More
30 Aug 2020 06:23 #180030 by tommylight

Why the fourth axis is linear? Do you have tested the fourth axis? I think it would be rotational axis

I needed it linear, you can have it rotational.

Please Log in or Create an account to join the conversation.

More
02 Sep 2020 16:34 #180445 by porshe
Already connected H-bridges BTS7960 43 A to Linuxcnc

Please Log in or Create an account to join the conversation.

More
02 Sep 2020 17:45 #180453 by tommylight

Already connected H-bridges BTS7960 43 A to Linuxcnc

Is thet a question or a statement ?

Please Log in or Create an account to join the conversation.

More
22 Aug 2021 10:18 #218397 by BigDo
Tommy,
can i use this PWM drives with this babys and BRIH 40D1605A1000 Encoder on a MESA 7i98 Anything I/O Ethernet Controller?
Do i need a Daughtercard for this controller or can i wire it directly to the 7i98

Niko
Attachments:

Please Log in or Create an account to join the conversation.

More
22 Aug 2021 10:32 #218399 by tommylight
Not sure as i never used a Mesa 7i98 so i do not know what it does.
Keep in mind that these drives do not have current limiting so any misshap will burn the mosfets and/or motor.
Arduino BTSnnnn do have some type of current output but never had the time to make it work. They also work nicely with Mesa 6i25, a bit worse with parallel port.
 
The following user(s) said Thank You: BigDo

Please Log in or Create an account to join the conversation.

More
23 Jan 2024 01:32 #291381 by vre
Searching h bridge pwm driver for 110v 250w brushed dc motor.
What about this driver ?
www.electronics-lab.com/project/15a-100v...-half-bridge-driver/
I will combined with mesa and quadrature rotary encoder feedback.
For pid tuning FF1 / P / D is needed?

Please Log in or Create an account to join the conversation.

More
10 Feb 2024 05:01 #292972 by vre
For this dual h-bridge driver what pwm frequency you used?
Also what frequency servo thread?
What P/D/FF1/FF2 values?

Please Log in or Create an account to join the conversation.

More
10 Feb 2024 13:11 #292989 by tommylight
The complete config with those values is attached here on this topic:
forum.linuxcnc.org/show-your-stuff/31742...otors?start=10#90038
The following user(s) said Thank You: vre

Please Log in or Create an account to join the conversation.

More
11 Feb 2024 04:08 #293055 by vre
On your chinese pcb the letters on driver chip are readable or sanded?
Because my motors are 48V and want to replace mosfets that allow higher voltage
and if i know the h-bridge driver ic helps..

In your config base thread is 20khz so pwm freq is 10khz correct?
In this config pid is tuned for you machine or
is semituned just to run motors without load?
What procedure you follow to tune then?
This or something more to find correct D?
gnipsel.com/linuxcnc-old/tuning/servo.html

I have a ploter from 1990s with small brushed dc servos and currently my speeds are 1m/sec and acceleration 10m/s^2 with mesa ethernet card (1khz servo thread/20khz pwmgens) but motors are not tuned my f-error is set 10mm to not throw alarm for these speeds.
Because of low mass gantry i think can double these rapids but don't know what cost
will have to f-error. For these speeds 2khz or 4khz servo thread will improve f-error?

Please Log in or Create an account to join the conversation.

More
11 Feb 2024 11:26 #293079 by tommylight
Chips are sanded, PWM is probably 10kHz, tuned with no load so should be fairly easy to fine tune, the tutorial is good for tuning and most of the time there is no need for D, you do need to do more tuning and set f-error to 1mm, and with Mesa cards 1kHz servo period is fine and smooth.

Please Log in or Create an account to join the conversation.

Time to create page: 0.093 seconds
Powered by Kunena Forum