enable extruder endstops error when using G1 H1 E400 F12000

jay_s_uk

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jay_s_uk

@DeadNewbie what are you trying to do? is it for filament changes?

DeadNewbie

@jay_s_uk Yes Exactly that, I have or am trying to get a 2 filament option to work,

I have 3 extruders,

Hot end Extruder 0
Y Splitter
Colour Feed A - Extruder 1
Colour Feed B - Extruder 2,

I have 2 tools defined
M563 P0 D0:1 H1 F0 S"Colour - 1" ; define tool 0
M563 P1 D0:2 H1 F0 S"Colour - 2" ; define tool 1

All 3 extruders are Bondtech BMG, and I have a selection arm similar to the ERCF selector which disengages the drive cogs on the feeding Extruders when not needed.

I want to feed quickly to the hot end and detect the stall, at that point I know the filament has hit the hot end and I can deselect the feed extruder with the servo and issue a M567 E1:0 to stop the feed extruder from pushing.

All seems to work ok, but I cant for the life in me work out what I am doing wrong with configuring the end stop for the extruder for Stall detection.

so any help I can get is much appreciated.

I would have gone out and got a ERCF, but I had all these bits in.

Regards

Michael.

DeadNewbie

Really struggling with this, now using 3.4.6 RC1 and still the same.

Anyone?

dc42

@DeadNewbie which Duet or other electronics running RRF are you using?

DeadNewbie

@dc42 mb6hc with exp3hc I also have a toolboard, but I am just using that at the minute for the acceleration module.

Thanks for looking.

just in case it helps, all 3 extruders are on the expansion board.

DeadNewbie

@dc42 the extruder stepper is the MT-1701HSM140AE slimline E3D, I get the odd stall detected when in use, so there is a little fine tuning left.

But I cant seem to get the G1 H1 to work.

regards

droftarts

@DeadNewbie I'd guess it's because you are trying to set two extruder axes' endstop with one M574 command (M574 E1.0:1.1 S3). In RRF, each extruder is treated as a separate axis, so you can't combine them. You just want the hot end extruder (extruder 1.0?) to detect the stall. If the hot end extruder and colour feed extruder are defined as a tool, this should stop both motors. If you need to detect a stall on either one, have separate M574 commands for each motor.

Ian

DeadNewbie

@droftarts I will give that a go..

not back home until later.

Thanks

dc42

@DeadNewbie is your extruder connected to a tool board or a CAN-connected expansion board? Stall homing of motors connected to tool or expansion boards is not yet supported. See https://docs.duet3d.com/en/User_manual/RepRapFirmware/CAN_limitations#temporary-limitations.

droftarts

@DeadNewbie Also, I think you've just run into one of the current limitations of CAN. You can't a homing move (ie H1) on a CAN-connected expansion board:

Stalls of expansion board motors cannot be used for homing. We expect to remove this restriction in firmware 3.6.

https://docs.duet3d.com/User_manual/RepRapFirmware/CAN_limitations#temporary-limitations

If possibly, wire the extruder to the main board.

Ian

DeadNewbie

@dc42 @droftarts

Thank you both, that would do it, I will move it back to the mainboard and retest.

Regards

DeadNewbie

@dc42 @droftarts

well, I got further, I ended up moving X and Y to the Expansion board and moved all 3 extruders to the 6HC.

i no longer get the error, but it doesn't move anything when I issue the
G1 H1 E400 F6000

I will upload config.g later along with m122 and m122 b1.

what am i looking for in the m122 output to determine if the stepper is already stalled?

Thanks again for the help.

Michael

DeadNewbie

@DeadNewbie

just got back to this, been busy moving my kids home after university.

dc42

@DeadNewbie said in enable extruder endstops error when using G1 H1 E400 F12000:

what am i looking for in the m122 output to determine if the stepper is already stalled?

It would be included in the text that follows "Driver 0:" etc.

To ensure that it is not stalled at the start you can execute a small move (more than one full step) either forwards or in reverse before the main filament feeding move.

DeadNewbie

@dc42 Thanks, I am still snowed under, but hope to take a look tomorrow, I will update asap.