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Author Topic: HELP! Motors "lock" when going reverse!  (Read 4169 times)

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HELP! Motors "lock" when going reverse!
« on: April 27, 2015, 10:31:21 PM »
This is my first CNC experience and I'm having trouble

Whenever I try to jog the motors (XYZ) forward, it works fine, but when going reverse (negative) it moves for about a second then it seems like it "locks" then it doesn't move at all.

One time I got Z and X to move both forward and backward but when I tried moving Y, nothing happened, then X and Z won't move at all anymore. I restarted Mach3 and the machine and it"s back to it's old problem - "locking' when going reverse.

Also, sometimes they move but sometimes they don't. It's a moody machine.

Is there a problem with my settings?

(in mm)
--Pins
Port 1, 0x378 (according to my system)
X axis - Step Pin 2, Dir Pin 3 (Dir Low) (Step Low Active) Pin 1, Port 1
Y axis - Step Pin 4, Dir Pin 5 (Dir Low) (Step Low Active) Pin 1, Port 1
Z axis - Step Pin 6, Dir Pin 7 (Dir Low) (Step Low Active) Pin 1, Port 1

Probe Port 1, Pin 15, (Active Low) - not sure about this one though
Estop Port 1, Pin 10, (Active Low)
Enable1 Port 1, Pin 14

--Spindle Setup
Disable Flood/Mist relays checked

   Motor Control
Use spindle Motor output checked
Step/Dir Motor checked
PWM base Freq. 5
PWM Min 0%

--Motor Tuning
X Axis Steps Per 200, Velocity 2000, Acc 200, Step Pulse 3, Dir Pulse 1
Y Axis Steps Per 200, Velocity 2000, Acc 200, Step Pulse 3, Dir Pulse 1
Z Axis Steps Per 200, Velocity 800, Acc 150, Step Pulse 3, Dir Pulse 1


Any ideas?  ???




« Last Edit: April 27, 2015, 10:44:18 PM by Jannes20 »
Re: Motors "lock" when going reverse
« Reply #1 on: April 27, 2015, 10:33:39 PM »
10:30 am Update: Now it won't move at all

10:33 am Update: Now X and Z move forwards and backwards, Y only moves forwards and when it moves backwards it stops after a second. Sometimes X and Z don't move too. YOu have to press them in a certain order (X+, X-, Z+, Z-) If not, they won't move at all. Any ideas on what is going on??
« Last Edit: April 27, 2015, 10:37:56 PM by Jannes20 »

Offline BR549

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Re: HELP! Motors "lock" when going reverse!
« Reply #2 on: April 27, 2015, 10:50:08 PM »
What machine ? , COntroller ? is it ?

(;-) TP
Re: HELP! Motors "lock" when going reverse!
« Reply #3 on: April 27, 2015, 10:53:32 PM »
CNC Machine Router 3 axis 3020 (does that help?)
Re: HELP! Motors "lock" when going reverse!
« Reply #4 on: April 27, 2015, 11:07:45 PM »
I tried slowing down the jog rate, still has the same problem. Sometimes it works, sometimes it doesn't. I'm kinda new to this and I'm really hesitant to explore since I might hurt something bad.
Re: HELP! Motors "lock" when going reverse!
« Reply #5 on: April 27, 2015, 11:21:16 PM »
I opened up the controller and saw that whenever I move the motors, the red LED light lights up, and when I stop the red LED turns off for each motor. I notice that whenever the motors "lock" the red LED stays on, when it usually just flashes off when there is no movement. I don't know what this indicates but it indicates something
Re: HELP! Motors "lock" when going reverse!
« Reply #6 on: April 27, 2015, 11:27:32 PM »
11:22 am Update: XYZ are moving both forwards and backwards!!!I didn't really do anything, I just checked the Enable1 and put it in Port 1, Pin 16, then unchecked the charge pump.

But sometimes they stuck and "lock". When one motor locks, its red LED light stays on. I'll press random motor jog buttons on Mach3, and nothing will happen for a while but after a few seconds, it starts working again. It works sometimes, but sometimes it doesn't. I want to make it work always. Any ideas on how? and why this is happening?
« Last Edit: April 27, 2015, 11:29:23 PM by Jannes20 »
Re: HELP! Motors "lock" when going reverse!
« Reply #7 on: April 28, 2015, 07:25:37 PM »
Any ideas?  ??? I really need this to work
Re: HELP! Motors "lock" when going reverse!
« Reply #8 on: April 28, 2015, 07:36:48 PM »
 Can you post a link to your controller?
Regards
Charlie M.
Re: HELP! Motors "lock" when going reverse!
« Reply #9 on: April 28, 2015, 07:44:12 PM »