Hi everybody. Just joined here but I'm part of a few laser and 3d

Lasers
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1

Hi everybody. Just joined here but I’m part of a few laser and 3d groups on Facebook.

I just recently wired up the ramps 1.4 upgrade to my k40. Wired everything to a T but for some reason I’m having lots of trouble trying to get my steppers to move.

The LCD keeps saying endstops hit even when its far from them. The y barely moved in little jerks and the x doesn’t move at all.

Does anybody here have experience with this problem?

Thanks in advance.

2

Most likely the endstops are wired wrong or configured wrong in the firmware. Did you adjust the power to the stepper motors?

3

If you mean the wiring to the stepper motors, then yes I have that right. As far as adjusting the power to them goes I’ve not been versed on how to do that yet. Been looking for a data sheet for these steppers to find out more about them, but I haven’t had any luck.

4

And as far as the firmware goes, I’m just using the turnkey tyranny setup the same as it comes.

5

Also i forgot to mention that i’ve disconnected the endstops and tried to move the head around just in the center of the work area and i still get the same result. which makes me think it would be the firmware. but like i said, im using the turnkey marlin just how it came.

6

the endstops are wired seperately from the motors… does your K40 use optical endstops, or microswitches?

7

And to adjust the power to the steppers, u need to adjust the tiny POT on the stepsticks.

8

9

well if u disconnect the endstops, depending on if they are normally open, or normally closed, could cause the endstop to register as being hit.

10

optical endstops.

the little pots on the drivers don’t seem to have an end or a beginning. is there a general way to adjust those without having a meter on hand?

11

I just adjust them until the steppers move well, and provide enough force to avoid missed steps. But I think your issue is more endstop related.

12

so if there’s something in the code that has the endstops set as a different than my norm, open or closed - wise, that would give me the trouble then? ill have to looke more into the code then. i’m new to that kind of stuff.

13

Yes, that can cause the stepper motors to stop and jitter like that, cuz it think it’s hit a endstop so it stops

14

gotcha. makes sense. well that sounds about right for whats going on with my y axis. my x isnt moving at all so im wondering if thats another issue altogether. going through and looking at the code right now.

15

Question though…
Wouldn’t unplugging the wires for the endstop signals give me use of my steppers, even if the code was wrong?

16

Only if they are configured as normally open.

17

gotcha thanks

18

Endstops on my K40 are wired normally open, hitting a stop closes the circuit.

19

So i disabled min and max endstops in the firmware and uploaded. Doesn’t say endstops hit anymore but im still getting the same response. Stepper just barely moving like a mm at a time when i try to move it using the lcd screen.

Any thoughts?

20

I’m out of ideas, sorry.