@gixxerfast said in RRF 3.4.0beta7+5 SBC Servo only responding once after reset:

M280 P3 S90
M280 P3 S120 ; <<--- This doesn't work?

Correct. Any command after the first (M280 P3 S90 in this case) is ignored.

@phaedrux

I have tested using the servo using the link you have provided in stand alone mode:

Firmware: RepRapFirmware for Duet 3 Mini 5+ 3.4.0beta7+7 (2022-01-14)

Same thing is happening. Servo only moves once initially.

Thanks

Same thing happening in Stand Alone mode.

Downgrading to 3.3.0 solves the problem.

Hi,

I am using RRF 3.4.0beta7+5 SBC. When using the M280 command, I can move the servo once. After that it does not move until I reset the board. 3.3.0 did not have this problem.

Config:

M950 S3 C"io1.out"

Using a Duet3 Mini 5+ without any expansion boards.

Thanks

Dear forum,

I currently run various printers (IDEX, Delta, Cartesian) using DuetWifi.

I'm looking to build a pick and place machine, similar to this one: 4-Axis-SCARA Arm.

Looking at the "ConfiguringRepRapFirmwareSCARAPrinter" wiki 3 axis SCARA will work.

Is there any way I can use the fourth axis? The fourth axis does not have to move at the same time as the other three. I'm thinking of making the fourth axis the "U" axis?

Any ideas if this would work?

Thanks

Dear Forum,

I am trying to find the center of a round cavity by using M675 and a Z-Probe (Precision Piezo).

It is configured like this:

M558 P1 C"!zprobe.in" H4 F220 T200            
G31 P520 X0 Y0 Z0    

My M675 command is:

M675 Y R4 P0 F600

This works very well in the minimum direction of the axis (the Z-Probe value is around 515 when idle). As soon as it probes the max direction of the cavity I am struggling to get a trigger bigger than 520.

I noticed that my Z-Probe value goes down to under 500 when hitting the round cavity in max direction.

I guess when the piezo disc is being squished when probing into the min direction (causing a Z-Probe value bigger than 520). When probing the max direction, then it seems that because the piezo disk has less pressure on it, thats why the Z-Probe value goes under 500.

Any idea what I can do about this? Ideally one could also specify a "min trigger value"...

Thank you kindly.

Matty