Topics created by flippnswitchez

![I did a PID tune. Here are my current config settings and this is how the print looks M350 X32 Y32 Z32 E32 I1; Configure microstepping with interpolation
M92 X160 Y160 Z400 E190; Set steps per mm
M566 X500 Y500 Z80 E100 ; Set maximum instantaneous speed
M203 X1000 Y1000 Z450 E100 ; Set maximum speeds (mm/min)
M201 X6000 Y6000 Z200 E10000 ; Set accelerations (mm/s^2)
M906 X1400 Y1400 Z1500 E800 I30
M84 S5 ; Set idle timeout

; Axis Limits
M208 X0 Y-5 Z0 S1 ; Set axis minima
M208 X330 Y330 Z400 S0 ; Set axis maxima

; Endstops
M574 X1 Y2 Z1 S0 ; Set active low endstops

; Z-Probe
;M574 E0 Z1 S0
M558 P1 H3 I1 F200 T6000; Set Z probe type to unmodulated, the axes for which it is used and the dive height + speeds
G31 P600 X45 Y20 Z.35; Set Z probe trigger value, offset and trigger height
M557 X15:305 Y15:305 S40 ; Define mesh grid
](https://drive.google.com/file/d/0B-B62QlKS2q7Yl80RDZnN2RrWDFlcHhWZFZ6YlM4a1lYOGdF/view?usp=sharing)

Can anyone recommend the best way to protect the signal from interference. The signal cable is running a total of about 1 meter alongside stepper cabling. I could run the cable separately, but would prefer to keeps it clean and together if possible.

I have plenty of shielded Cat5e/6 lying about, would that be fine? How best would I go about utilising the twisted pairs? Tie them together and treat the entire cable as 4 conductors, or e.g. pair signal and gnd? Or should I just experiment and see what works?

Also, does anyone have experience using Cat5e/6 for the steppers? I'd need to check the gauge on the stuff I have, but from what I've read it should be able to handle the NEMA17s I've got.

Well, that is a little embarrassing lol. Not sure how that happened…Thank you!

Helps if you have the jumpers in place haha

It looks to me that your leadscrews have got out of sync. This happens on printers with dual lZ eadscrews, because when you lose power and then restore it, each motors jumps to a nearby multiple of 4 steps that matches the motor current; and the 2 motors may jump in opposite directions.

For now I suggest you resync the motors manually to level the bed or gantry. When you have your printer running well, you may wish to do this resync automatically, as described at https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors.

@flippnswitchez On a CoreXY swapping the motors reverses an axis. There are 8 combinations:

Motor 1 Motor 2 X Motor forward Y Motor forward X Motor forward Y Motor backward X Motor backward Y Motor forward X Motor backward Y Motor backward Y Motor forward X Motor forward Y Motor forward X Motor backward Y Motor backward X Motor forward Y Motor backward X Motor backward

One of these combinations will always result in a left handed cartesian system. The other combinations will result in either a right handed cartesian system, reversed axises, or swapped axises. The exact setup you need depends on your motor location, wiring, and possibly belt routing.

For reference you ultimately want a left handed cartesian system. This is important because a right handed system will print things backwards, this isn't a problem 90% of time but is maddening 10% of the time. The correct cartesian co-ordinate system looks like this:

0_1523851005936_Cartesian System.png

Purple is the location of my end stops so they are configured for X min, Y max and in my homing files I tell the printer to "home" to back-left corner.

Are you sure that your Z steps/mm value (4000) in the M92 command is correct?