Prusa Mendel Iteration 2 Stepper Motor Z Issues

Running two motors in parallel is going to double your power requirements and stored energy.  What are the ratings of your drivers and motors, including coil resistance?  Do you have an oscilloscope?  Does it record?

Here's the stepper motors i have currently

and the specs with it 

Shaft: 5mm diameter with flat
Current Per Phase: 1.5A
Holding Torque: 5.5Kg.cm (76 oz-in)
Rated Voltage: 4.2V
NO.of Phase: 2
Step Angle: 1.8° ± 5%
Resistance Per Phase: 2.8Ω± 10%
Inductance Per Phase: 4.8mH± 20%
Insulation Class: Class B
Dielectric Strength: 100Mohm
Operation Temp Range: -20 ~ +40° C
Lead Wire: 22AWG / 750mm with connector to stepper motor driver

As for the drivers i want to say its a ramps 1.4 for an arduino mega, here's a picture

Found the kit i bought: SainSmart MEGA2560 A4988 Ramps 1 4 3D Printer Kit for Arduino RepRap | eBay

I'm also changing the couplers from the 3d printed to the metal ones and changing my stop switches to mechanical ones

I don't have an oscilloscope but I do have a multimeter

Also here's my power supply ratings

google isn't letting me see your links

Saved the photos to my computer and reloaded them, are they working now?

Yes, now I can see them.  Your power supply seems adequate.  See that your connections are solid.  This is a fairly high current deal.  If you are using screw terminals, make sure your wires are freshly tinned and central in the connector and that the screws are tight.

I'll try tinning the ends for all of the wires. Also the z motors like to put the carriage at an angle

No change. All of the motors are loud and barely move

Also I'm wondering if the number of teeth on the gear for the x and y axis would affect it much. My current gears have 11 teeth

Hello Ryan

I've seen people with both the top and bottom of the threaded rod constrained which will typically work with printed couplings but once all metal is added noticeable binding is apparent.  Do you happen to have both ends bound?  What kind of bushings are you using with the smooth rod?  Another area to check is make sure the z axis carriage is sitting perpendicular to a level surface.  I've seen a few printers that had the z carriage leveled to the bed but if the bed is not level then the carriage wont be either.  Now if the x and y are binding with belts the cause is usually to tight of belts.  The more teeth you have should be a problem.

Nate

Could you post a photo of your situation?  I only have experience with milling and other subtractive methods.  I'm not hip to three-dee printing.

I'm waiting for some parts to come in. I'll replace those and then post a video show the issues I'm having