Hi,
on my DIY CNC router (2000x1000x850mm - X, Y, Z) I am having some problems...
The whole machine is build of Aluminium (solid and stable construction). X axis has 2 stepper motors runnig on rack&pinnion, Y axis has same motor running on Ball Screw 2020 (20mm) and Z axis is running also on Ball Screw 1615 (16mm) with Unipolar Stepper motor.
X and Y axis have this stepper: (NEMA 34 13Nm)
Model
Step angel (° ) Motor Length L(mm) Rate Voltage
(V) Rate Current (A) Phase Resistance ( Ω ) Phase Inductance (mH) Holding Torque (oz.in) Lead Wire (NO.) Rotor Inertia
(kg. c?) Motor Weight (kg) 34HS5435C-37B2
1.8 151 5.7 3.5 1.9 22 1600 4 3.6 5
It is bought on ebay:
ã€Germany Warehouse】4Axis Nema34 Stepper Motor 1600oz.in single &DriverCNC Router | eBay
Z axis is using NEMA 34 with 8.5Nm)
1 PCS NEMA 34 DUAL SHAFT STEPPER MOTOR 1200 OZ-IN | eBay
Drivers are all same - DM860A - every driver has its own suply unit.
THE PROBLEM:
When I make a g-code in any CAM software and run it on machine, I get some wrong movements in X (2 slaved motors) axis. (see picure)
http://www.cnczone.com/forums/attach...d=356178&stc=1
It goes just as it wants and when I hit "GO TO ZERO", Zero point is missed by all 3 axis.
X axis goes sometimes in positive, sometimes in negative way. Y axis is almost OK. Z axis goes sometimes in positive and sometimes in negative way, just like the X axis.
There is no motion controller running on this machine, it is directly break board via LPT cable connected to PC. Also tried with changing PC - same results.
Problem with UC300 USB motion controller: When the spindle turns on, I get MSG in MACH3: UC300 is not connected (blue LED turns off). When I disconnect UC300, close Mach3, reconnect UC300 and reopen Mach3 everything works fine until i turn the spindle on. Spindle is not connected to analog port to be turned on/off. It is turned via its own control panel. Spindle is VFD controlled 2.2kW water cooled - standard from ebay.
Does anyone has any idea, as this is making me crazy since 4 months??
Mach3 break board will be changed tommorow to check if this board is OK.
Best regards,
Dean