Overall, this is a new machine build thread, but I am encountering a problem so I start off asking for help.
The Mill:
SX3 Grizzly G0619
CNC fusion kit #1 (no ball screw upgrades until I see I need them)
Motor driver: G540
Motors: X/Y 270 oz-in (Nema23), Z is 400 oz-in (Nema34)
power supply: The power supply is rated at 12amp and 24V (from camtronics-cnc.com)
Other: Gas spring kit
Software: CamBam Plus, Mach3, Solidworks 2009
I chose the smaller motors after being advised the 1000 oz-in were severe overkill. Dan (from Camtronics-cnc.com) put together his recomendation for motor/power supply/driver and I bought the kit from him. He seems to be a good guy and promptly returns emails with all of my questions.
The problem:
I've installed my Z axis stepper, but it seems underpowered and misses steps or barely moves at all. I've lowered the velocity/acceleration to ~100 mm/min, but still misses steps. When I took the assembly apart, I tried holding the motor with my hand to feel the torque. I was suprised, that with only slightly more than firm handshake grip, I could prevent the 400oz motor from turning. The video doesn't show very well the screen, but I was only trying to show that my motor tuning is a bare minimum speed/acceleration.
[can't get the file to attach, so I put it on youtube instead]: [ame="http://www.youtube.com/watch?v=l7DVBJNO8l0"]YouTube - Z axis problem[/ame]
Any help here is appreciated, is it a defective motor, or is the motor even too big for the G540? or is there another obvious setting I am neglecting?
Dave