@mikeabuilder ahh thanks

@DC said in Homing X and Y - Target position outside machine limits:

G1 Y-3 Z-3 F2400 ; go back a few mm

in your homing scripts, you home to X,Y Z minimum, then instruct the machine to go beyond minimum to "back off" before doing the second pass. I expect you actually want it to go Y3 Z3 (i.e. positive movement) before homing back for the second pass.

In addition I am not sure you want to home to Z min, and then Home X or Y because that moves the spindle down, presumably you would want to move it up, out of the way, before homing X and Y?

@RockB said in Rotary axis feedrate calculation:

set rotary axis for infinite rotation

The M208 is the smaller problem. M208 XYZ uses print area limits in mm traditionally (because they were used for linear axes). M208 A is then e.g. in degrees, but it's not possible to set XYZ degree limits for XYZ rotary axes. This is solved for kinematics with XYZ rotary axes by other means, e.g. dedicated angle limit parameters. Not specifying A limits will probably solve the problem.

But as said, this is the smaller problem. Main problem, if you plan to have an actuator which runs all the time, is, that RRF is not designed this way. Every stepper needs to be planned in a fixed time frame, i. e. needs to end. So an unlimited movement is not possible.

There is a thread discussing whether RRF can be extended to support unlimited movements. Another possibility is to install a stepper outside of RRF with unlimited movement and control start/stop with RRF.

If you meant turning an axis more than 360 degrees with infinite, there was the thread https://forum.duet3d.com/topic/17169/what-s-the-best-way-to-set-up-a-continuous-rotation-for-an-axis?_=1592982351701
This movement will however stop after the time frame, however.

@VastGsm
Sorry it's repurposed now. Are they still short of stock in europe?

@Phaedrux it was 300, I've set it to 500

Probably. Anything from 1050 on up if you can get it heat treated. 301 stainless would be a great choice because of its corrosion resistance but it's higher CTE may not be so great. It may not like the temperature and warp. Either way you probably cant go wrong with 1095

@gloomyandy schematics are here https://github.com/dc42/PanelDue

@jay_s_uk Whoops! Swapped my Z-value and S-value, thanks a ton

@pzmurphy in the crash could VIN on the heater on the print head be fed into the tem sensor or other IO on the Duex5? How sudden was the crash and how fast was the axes moving when it happened?

Ah, bother, there is an error in one of my formulae and akismet won't let me correct it. The third bullet point should have "This expands to..." with 2 * revs * motionBackEmfPerRevSec * voltageDrop in the middle of the equation (where revs is not squared).

@TLAS like a tool distribution board, but for the motors? yes thats planned but not scheduled.

re, daisy chaining not directly on the motors.

Hi Tony, I have tried another probe with the same result (they are only cheap). If I insert a dress makers pin in beside the zprobe signal pin and short the diode, the voltage at the pin toggles between +0.7 volts and +24 volts with respect to Ground. With the diode in circuit, the signal voltage toggles between approx +1 and +2 volts. It never goes to zero. However, if I unplug the probe at the zprobe socket and jumper the signal pin to Ground (the adjacent pin), I get the same results running command M119 i.e. 'z probe at min stop'.
Late Extra: I just tried it after re-plugging the z probe plug on the Duet board and presto, it's working properly! I've wriggled all the connectors but can't make it fail now. Thanks for walking me through this mysterious problem. I can now proceed to the stepper motors. Cheers, Ralph

@e4d another possibility is that the large number of http clients is causing RRF to run out of output buffers. On the 6HC we have enough spare RAM to increase the number of buffers.

Thanks! @yasas has started a new thread about collecting some calibration data:

https://forum.duet3d.com/topic/31907/collecting-timelapses-need-your-help

We would appreciate input from people to assist with his Masters research project.

@Sophiechka thanks for confirming the issue. will marked this as resolved.

When and where did you purchase?
Can you send M122 before and after mounting with M21 and copy paste the results here?

@droftarts I read it but I didn't completely understand it. I knew after looking at the data that it was reading wrong. Thank you for the help.

@T3P3Tony Still wont let me edit it, but its not an issue for this thread. Thanks for the upvotes though!