Core XYU or XYUV
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@curlypaul I have an idea but I might be on the wrong track. I need to clarify a few things in my mind - bear with me.
Looking at your rig, I'm assuming that you just have one gantry that moves towards the back and front and that on that gantry you have two independent heads that move left to right yes? If so, then and Y and V are common but X and U are separate yes?
You are homing X to the left but U to the right yes?
But you have all the end stops set to the low end (M574). So what I think you might need to do is change the U end stop to be at the high end (change M574 U1 to U2). But then you'll need to change the motor directions as well (I think - because you say that it currently homes correctly but we need to change the endstop from being low end to high end). Maybe David can confirm or otherwise.
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I noticed the U was U1 not U2 after I posted the code - changed to U2 still the same
Everything else you typed was correct
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@curlypaul You've got a couple of M574s in your home U as well as in config.g. Do they now all match?
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@deckingman Yes - Both U2
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@curlypaul I've just re-read you post - lack of caffeine on my part - it's Y that you are having problems with not U. So you can home Y fine but you can't move Y "normally". That's a bit puzzling. My printer is a bit different because I have two completely separate gantries (actually 3 because it's now CoreXYUVAB) but what I have to do is map the motors to individual axes for homing, then combine them for "normal" movement. So maybe what you need to do is, after homing Y combine the Y and V motors. So send M584 Y1:4. if that works, then change your config.g to be M584 X0 Y1:4 U3 V4 Z2 E5:6 (not sure about the "P" - maybe leave it as 4). That might work (no guarantees)
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@deckingman - can't hurt to try ! - thank you for taking the time
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Well, that made for some strange movements
So, I can home X, Y and then U - all fine then if I try to move Y it doesn't move correctly and the belts/motors make angry noises (Sorry - I spent ages thinking of a better description)
Yet X and U still move correctlyFrom a fresh power on situation, if I send M564 H0,same as homing, again x moves okay, y moves okay, u moves okay. Go back to y - angry noises again
If I move x, then u - all okay but then if I move Y - it doesn't like it -
@curlypaul "Angry noises" is nicely descriptive.
It seems that the motors are fighting against each other - or maybe one or more is stationary.I'm looking at your home Y file and trying to figure out what's different between a G1 Y move there and a G1 Y move outside of home Y. 2 things leap out at me (but I'm not sure how it helps).
Firstly, you seem to have a scattering of "G1 S1" moves in amongst the "G1 H2s". So you ought to correct them (edit - change them from S1 to H1).
Secondly H1 and H2 moves select individual motor mode. So I'm guessing that if you send G1 H2 Ynn it will work, but if you send G1 Ynn (without the "H") you'll get "angry noises". Can you check if that's the case?
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@deckingman - I didn't spot the S1 in HomeY, That's gone now - still the same
In the meantime, I thought I'd try swapping the carriages - so U is now RH / X LH still the same issue
It's really baffling me, all axis move the correct way and amount on their own, just whenever need to 'mix' axes (if that makes sense) Y goes wrong.
I unhid V and sent a M564 H0. U and V move correct ways and I can then move X try and move Y .... angry noises
I reset... I move X,U and Y, and X,Y and U try and move V - angry noises
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Endeavoured to make a video of whats going on..
This is with carriages swapped from original - as mentioned in previous post
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@curlypaul Sorry for the delay - had a power outage here. Did you try sending G1 H2 Ynn to see if that works, then G1 Ynn (without the H2)?
Then maybe try G1 H2 Vnn. If V goes the opposite way, then that might explain why Y (which is Y and V) goes haywire.
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@curlypaul Also, after homing, try sending M584 P3 to see if that makes any difference.
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@curlypaul Edit - to attempt to home V you'll need to use M584 P5 to make it visible.
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@deckingman - No worries - i Had to walk away from it for a bit anyway !
So I tried the H2 and without - I just what can only be described a machine gun noise - mostly from the 'x' carriage
After the M584 P5, the 'U' carriage just twitches
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Right - Think spotted something !?
after homing x,y and u - it appears to me that the lower pair of 'U' axis motors aren't moving when I try to move Y -
@curlypaul That's weird. Because a G1 H2 Ynn move is what you have in your homing file and you say that homing file works fine (in fact your video shows it working fine). So I really can't understand why sending exactly the same command outside of homeY doesn't work. If you were re-mapping motors or some such I could understand it, but you aren't doing that. The only thing you do at the end of homeY is restore the motor currents and change the endstop settings but none of that should make any difference.
I've really run out of ideas - we need DC42 or someone else equally knowledgeable to look at this. Clutching at straws but maybe try removing the final M574 at the end of homeY. I really don;t see why that should make any difference but it's the only thing (apart from motor currents) that gets changed after Y has been homed.
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@curlypaul said in Core XYU or XYUV:
Right - Think spotted something !?
after homing x,y and u - it appears to me that the lower pair of 'U' axis motors aren't moving when I try to move YYes I figured something like that was happening - hence the "angry noises". The question is why (when they all move as expected during homing). And why again, when you send G1 Ynn H2 which is exactly the same thing as your homing move.
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@deckingman - I'm going to try to add switches instead of the sensorless see if that makes a difference ?
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@curlypaul Another thought. Maybe it is a motor mapping thing and one pair of motors never moves as expected. But when you reduce the motor current (as you do for homing) the holding current isn't enough to hold them in position. So it looks like you get correct movement and without angry noises but that's just because the lower holding current is masking the problem with stationary motors. That would be easy to test - just leave out that final M913 X100 Y100 from home Y.
Try that - Home Y but leave the motor current reduced. Then try moving Y. If Y them moves without angry noises, we know it's a motor mapping/motor direction thing.
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I thought you were onto something there !
But alas.. the UV motors are still not moving after homing, motor current is definitely reduced as now 'x' carriage twitches as I try to move Y
