Question , cant find any info or answers

[feaver12]

Sorry to ask like this but I have a question that I'm struggling to find any info on....and nobody i ask can seem to give me any awnser to - under parameter "gate_endstop_to_encoder" what do you mean by "+ve if encoder after endstop"? I keep getting failed to unload errors when retry unload is called, but the filament laterally falls just short of the gate endstop by a few mm (maybe 5mm max). I have messed with parameter values relating to gate-encoder distance a little up to 20mm difference in values and there is no change. I'm guessing my issue has something to do with this as my "gate endstop" is at the end of a splitter and the encoder is fitted after the gate endstop.... thank you in advance.

[moggieuk]

This setting is purely to describe the distance from the gate endstop (sensor after the gate) to the encoder. It is only used if encoder is fitted and originated when Tradrack owners fitted an encoder after the existing gate sensor. In that situation it is a positive value. In a MMU design where the optional encoder was before the gate sensor it would be negative.

Note that when unloading filament Happy Hare will "home" to whatever the defined gate endstop is. This can be a switch (gate sensor) or use the encoder. This is set with gate_homing_endstop.

MMU_STATUS SHOWCONFIG=1 is really helpful to explain the load/unload sequence used based on your current configuration.

[feaver12]

Ok that makes sense. I am using a custom mmu that is not much like the ercf. So what value should I be looking at? The filament unloads fine until there is a load error, when the loading error occurs, upon unloading (ive noticed at a much slower speed) the filament falls short of the gate endstop by about 5mm....I have messed with gate homing max and gate endstop to encoder values (see attachment) and nothing seems to work. The filament always falls short of the gate/splitter endstop by about 5mm but only when an error is thrown. Never under normal unloading conditions....

On Sun, 11 Aug 2024, 6:12 pm moggieuk, @.***> wrote:

This setting is purely to describe the distance from the gate endstop (sensor after the gate) to the encoder. It is only used if encoder is fitted and originated when Tradrack owners fitted an encoder after the existing gate sensor. In that situation it is a positive value. In a MMU design where the optional encoder was before the gate sensor it would be negative.

Note that when unloading filament Happy Hare will "home" to whatever the defined gate endstop is. This can be a switch (gate sensor) or use the encoder. This is set with gate_homing_endstop.

MMU_STATUS SHOWCONFIG=1 is really helpful to explain the load/unload sequence used based on your current configuration.

— Reply to this email directly, view it on GitHub https://github.com/moggieuk/Happy-Hare/issues/374#issuecomment-2282638988, or unsubscribe https://github.com/notifications/unsubscribe-auth/ANC2MVI3MOYRNSIH2E7II2LZQ36D7AVCNFSM6AAAAABMKM44VSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEOBSGYZTQOJYHA . You are receiving this because you authored the thread.Message ID: @.***>

[moggieuk]

The slow speed is deliberate because the previous error means HH isn't sure where the filament end is and so it moving slower. If using an encoder to unload this results in lots of small movements. If using a gate sensor then it is a continuous slow homing speed.

If this stops short of the gate, then either the calibrated bowden length is too short or your gate_homing_max is too short.

[feaver12]

Ok. Thank you for taking the time to respond. So I'm guessing that if everything is loading correctly 99% of the time then that means the bowden length is pretty close so I should be increasing gate_homing_max? I thought i had tried that but maybe i didn't increase it enough. Would any harm be caused if i increase the value too much? I calibrated bowden length to gate sensor using the manual method (pushed filament all the way to extruder gears manually and run the command).

On Thu, 15 Aug 2024, 10:10 pm moggieuk, @.***> wrote:

The slow speed is deliberate because the previous error means HH isn't sure where the filament end is and so it moving slower. If using an encoder to unload this results in lots of small movements. If using a gate sensor then it is a continuous slow homing speed.

If this stops short of the gate, then either the calibrated bowden length is too short or your gate_homing_max is too short.

— Reply to this email directly, view it on GitHub https://github.com/moggieuk/Happy-Hare/issues/374#issuecomment-2291016647, or unsubscribe https://github.com/notifications/unsubscribe-auth/ANC2MVJUMGGQZX5AQABFY6TZRR5CDAVCNFSM6AAAAABMKM44VSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEOJRGAYTMNRUG4 . You are receiving this because you authored the thread.Message ID: @.***>

[feaver12]

I have increased gate_homing_max as well as calibrated_bowden_distance as mentioned earlier and have done so in increments of 5 by upto nearly 100mm and still the filament falls just short of the gate sensor by about 5mm in the exact same spot Nothing changes. It only happens when there is a failed to load error and the mmu retries loading - this is when it fails to unload. Any ideas? Everything else works perfectly. It's only when I have a failed load that this occurs

On Fri, 16 Aug 2024, 3:34 am Nick Feva, @.***> wrote:

Ok. Thank you for taking the time to respond. So I'm guessing that if everything is loading correctly 99% of the time then that means the bowden length is pretty close so I should be increasing gate_homing_max? I thought i had tried that but maybe i didn't increase it enough. Would any harm be caused if i increase the value too much? I calibrated bowden length to gate sensor using the manual method (pushed filament all the way to extruder gears manually and run the command).

On Thu, 15 Aug 2024, 10:10 pm moggieuk, @.***> wrote:

The slow speed is deliberate because the previous error means HH isn't sure where the filament end is and so it moving slower. If using an encoder to unload this results in lots of small movements. If using a gate sensor then it is a continuous slow homing speed.

If this stops short of the gate, then either the calibrated bowden length is too short or your gate_homing_max is too short.

— Reply to this email directly, view it on GitHub https://github.com/moggieuk/Happy-Hare/issues/374#issuecomment-2291016647, or unsubscribe https://github.com/notifications/unsubscribe-auth/ANC2MVJUMGGQZX5AQABFY6TZRR5CDAVCNFSM6AAAAABMKM44VSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEOJRGAYTMNRUG4 . You are receiving this because you authored the thread.Message ID: @.***>