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Y axis has two joints and they move in opposite directions
- norbertfarquharsh
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7 years 4 months ago #137190
by norbertfarquharsh
I have tried to solve this problem and looked at the ,hal and .ini file and tried different things and cannot figure why in the Y axis the joints move in opposite directions.
I will also say that I cannot get homing to work properly with the HOME_IGNORE_LIMITS set to NO as they are supposed to be.
I have edited the files greatly to get the gantry operation set up so I suspect I have errors but I cannot spot them and would appreciate any help.
I will also say that I cannot get homing to work properly with the HOME_IGNORE_LIMITS set to NO as they are supposed to be.
I have edited the files greatly to get the gantry operation set up so I suspect I have errors but I cannot spot them and would appreciate any help.
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7 years 4 months ago #137192
by pl7i92
Replied by pl7i92 on topic Y axis has two joints and they move in opposite directions
Hi
it is best practise to give one of the Steppers a wire SWITCH
Switch from
A+ A- B+ B- to
A- A+ B- B+
only on one
YOU Can invert the DIR output pin of the one that is nearest cable
depending on what controller you got
setp parport.0.pin-03-out-invert 1
net ydir => parport.0.pin-03-out
it is best practise to give one of the Steppers a wire SWITCH
Switch from
A+ A- B+ B- to
A- A+ B- B+
only on one
YOU Can invert the DIR output pin of the one that is nearest cable
depending on what controller you got
setp parport.0.pin-03-out-invert 1
net ydir => parport.0.pin-03-out
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7 years 4 months ago #137370
by andypugh
Replied by andypugh on topic Y axis has two joints and they move in opposite directions
As well as swapping wires or inverting the dir pin you can try setting [JOINT_2]SCALE = -6400
But only do one of these three things or they will cancel out.
But only do one of these three things or they will cancel out.
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7 years 4 months ago #137373
by pl7i92
Replied by pl7i92 on topic Y axis has two joints and they move in opposite directions
best advise is always to
swapping wires
as it does not interfear any software calculation
swapping wires
as it does not interfear any software calculation
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7 years 4 months ago #137388
by AgentWD40
I'm curious, where would this cause problems with the software?
Replied by AgentWD40 on topic Y axis has two joints and they move in opposite directions
pl7i92 wrote: best advise is always to
swapping wires
as it does not interfear any software calculation
I'm curious, where would this cause problems with the software?
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7 years 4 months ago - 7 years 4 months ago #137407
by andypugh
Well, when I suggested a negative scale I couldn't decide whether the homing directions needed to be switched too.
In the end I decided not. But the fact that I had to think about it hints at the problem.
Replied by andypugh on topic Y axis has two joints and they move in opposite directions
AgentWD40 wrote: I'm curious, where would this cause problems with the software?
Well, when I suggested a negative scale I couldn't decide whether the homing directions needed to be switched too.
In the end I decided not. But the fact that I had to think about it hints at the problem.
Last edit: 7 years 4 months ago by andypugh.
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