Turn off the motor UART mode

[Mejituu]

About duet3mini5plus how to turn off UART mode to use third-party closed loop.I have a duet3mini5plus. By blowing down the 2209 chip and leading out the corresponding drive pins, I can make the external third-party closed-loop move through these pins. However, due to the offset problem in the printing process due to UART mode, how can I set the motor drive to turn off UART to use the closed-loop. Excuse me, this m569 P0 0 S1 D4 can turn off UART mode directly, and whether m569 needs to be configured 1. How to configure m569 if necessary one.

[Mejituu]

@mejituu About duet3mini5plus how to turn off UART mode to use third-party closed loop.I have a duet3mini5plus. By blowing down the 2209 chip and leading out the corresponding drive pins, I can make the external third-party closed-loop move through these pins. However, due to the offset problem in the printing process due to UART mode, how can I set the motor drive to turn off UART to use the closed-loop. Excuse me, this M569 P0.0 S1 D4 can turn off UART mode directly, and whether M569 .1needs to be configured. How to configure M569.1 if necessary one.

[dc42]

@mejituu how many closed loop drivers do you want to use? The driver expansion connector has two sets of driver control pins that you can access, without needing to tap into the on-board driver signals.

[Mejituu]

@dc42 I need to use two closed-loop interfaces, but the closed-loop driver I use is used as an ordinary 4988 driver on duet3 motherboard. Can I ask whether these two interfaces can be used directly. My driver needs the six pins of "EN STP DIR COM VIN GND", which is equivalent to using the closed-loop as an ordinary driver

[Mejituu]

@dc42 @dc42 It seems that the external closed-loop driver connected to me does not use UART interface. It should not be affected by reason, unless reprofirmware is set and affected in this way. This may be a step timing problem. M569 P5 R1 T2. 5:2.5:5:0 ; Driver 5 requires high level active enable, 2.5us minimum step pulse, 2.5us minimum step interval, 5us dir setup time and no hold time. How large should I set? The line length is 1m. Is the default timing size of duet3 0.

[dc42]

@mejituu what is the specification of the closed loop driver? Please provide a link to its manual.

[Mejituu]

@dc42 The specification is the same as that of 4988, which is equivalent to an ordinary 4988 driver. UART cannot be used

[dc42]

@mejituu in that case you should use the two sets of step and direction signals that are present on the driver expansion connector. UART support on those two drivers is optional in RRF.

[Mejituu]

@dc42 Can you choose whether to use UART through which gcode codes of RRF?

[dc42]

@mejituu no you can't. RRF will use the UART if it detects that it is present. This means that for the two add-on drivers that you can connect via the stepper driver expansion header of the Duet 3 Mini, you can choose to use drivers with or without UART.