Scara manual control

Fuzionline

@droftarts
tks
In relation to M208, via the pendant or DWC, it does not exceed the defined values, which is great. Since (X0, Y0) is the center of the SCARA, there is an area around this base that I want to prevents the pendant from mistakenly exceeding the area."
My duet is a 2 wifi , the M599 don´t work ?
tks

Fuzionline

@Fuzionline
Good afternoon! Are there any updates?

droftarts

@Fuzionline Ah, yes, M599 doesn't work on Duet 2 due to memory limitations.

Looking at your config.g, you seem to have your machine limits set to allow the Scara arm to go anywhere in a donut shape around the centre. Your M208 XY limits are +/- 1200mm, which is roughly the length of your proximal (765mm) and distal (475mm) arms, with a central no-go area of 450mm radius (ie 900mm diameter). Is this correct?

If you command it to go into any area within the 900mm diameter central area, I would think it should stop at the point it gets within 450mm of X0 Y0. If it continues to attempt to get there, I think that sounds like a bug. Can you confirm that's what you see?

Ian

Fuzionline

@droftarts

@droftarts said in Scara manual control:

Looking at your config.g, you seem to have your machine limits set to allow the Scara arm to go anywhere in a donut shape around the centre. Your M208 XY limits are +/- 1200mm, which is roughly the length of your proximal (765mm) and distal (475mm) arms, with a central no-go area of 450mm radius (ie 900mm diameter). Is this correct?

Regarding the M208 limits, everything is fine; when it reaches -1200/1200, it doesn't allow further movement.
However, there is an issue with the R value. I even increased it to R500, but it exceeds this value and continues until it reaches the limit defined by the distal angle, which is 150(endstop). If it continues to be commanded in that direction, it moves in the opposite direction and stops at the -151 distal angle.
It seems to me that the situation starts with it ignoring the value set in R.

@droftarts said in Scara manual control:

If you command it to go into any area within the 900mm diameter central area, I would think it should stop at the point it gets within 450mm of X0 Y0. If it continues to attempt to get there, I think that sounds like a bug. Can you confirm that's what you see?

No.Only stop when reach the 150 distal angle(420mm of X0 Y0 approximate).

droftarts

@Fuzionline said in Scara manual control:

No.Only stop when reach the 150 distal angle(420mm of X0 Y0 approximate).

I think that's the default. From 'Serial SCARA' tab of M669 https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m669-set-kinematics-type-and-kinematics-parameters

Rnnn (optional, RRF 2.03 and later only) Minimum permitted printing radius from the proximal axis. If not specified, it will be calculated to be slightly larger than the distance between nozzle and proximal axis when the distal axis is homed.

So it does look like R is being ignored. I'll report it to @dc42 and see what he says.

Ian