X7 DSP wiring to the K40 power module- Not firing

robpardee
Posts: 9
Joined: Fri Jan 05, 2018 2:20 pm

X7 DSP wiring to the K40 power module- Not firing

Postby robpardee » Wed May 09, 2018 6:29 pm

I was posting in another thread but I figured I should start my own dedicated thread to this problem. I cannot seem to get my X7 DSP to fire my laser. I have everything else working so far except this. Basically, if I have nothing connected to the K40 power module besides the power in and red and blue wires going to the laser tube I can press the test button on the power source and it will fire everytime. But as soon as I have any wires connected to the X7 DSP I cannot get the test fire button on the power source or on the LCD screen to fire the laser.
My power module looks like the 1st one pictured in this link:
www.everythinglasers.com/forums/topic/p ... pply-info/

The way I have it currently connected is:
Ground on the DSP to the G (5th port from the left counting from the test button)
PWM on the DSP to the IN (6th port from the left counting from the test button)
TTL on the DSP to the P (1st port from the left counting from the test button)

As far as the TTL I have been unsure about the wiring for this and have also tried the K+ in place of the P when P didn't work and that didn't work either. Currently the K+ and K- is left unused and the P is hooked up but again nothing works. I've even tried crossing K+ and K- while having P hooked to the TTL without luck. It's like this power source won't work with the DSP and I was under the impression it would. I've considered purchasing a replacement power source that looks like the 2nd one picture in the link above as I've heard this is a newer one but I'd hate to spend about $100 only to find out it was something else. If it makes a difference I am using the laser 1 phoenix connector for all these connections.

Please help!

Tech_Marco
Posts: 4351
Joined: Mon Jun 15, 2009 3:00 pm

Re: X7 DSP wiring to the K40 power module- Not firing

Postby Tech_Marco » Mon May 14, 2018 6:06 pm

May be you should post pictures of your connection to the DSP and the LPSU. Based on link the LPSU shown, you should connect P to G, and TTL to the K+ while K- is connected to the Gnd of the DSP. I'm not sure the K- and Gnd on your LPSU are shared or in common. If not, just tied up K- to the Gnd (or G) and then split a wire to the DSP's Gnd.

BTW, you have to connect both CN1 and CN2 from the LCD control to the DSP interface box. A lot of folks assume CN1 is necessary when first time using the X7 but it is wrong. Both CN1 and CN2 need to be connected. Not sure if that is the case happened to your

Marco

robpardee
Posts: 9
Joined: Fri Jan 05, 2018 2:20 pm

Re: X7 DSP wiring to the K40 power module- Not firing

Postby robpardee » Mon May 14, 2018 6:50 pm

Marco, seriously I don't know what I'd of done if you hadn't chimed in! I have p and G connected, K + is connected to the TTL and of course IN to PWM as you suggested and this is definitely correct. It turns out I did not have CH2 connected, apparently I did exactly what others have done and assumed it wasn't needed. As soon as I plugged in CH2 I can now test fire from the LCD and I'll bet this will fix everything

Man you are my savior!

I have two more questions if you have a minute:
1) What is the password to send settings to the DSP from the Raycam app? I tried to push settings to the controller while connected to my computer and it asked for a password that I couldn't find documented anywhere.

2) The last thing is the motor controlling the X axis gets really hot, too hot to touch infact and it's the only motor that does for some reason. I turned down the max power on the driver to 0.3A which is the lowest it can go and it still gets very hot. I don't know what else I can do to stop this, I'm afraid this will melt the printed part that my motor is attached to. I know I mentioned this somewhere but I don't remember if it was here, anyway I just don't want it to get damaged if there is something I can change to stop this.

Thanks allot!!

Tech_Marco
Posts: 4351
Joined: Mon Jun 15, 2009 3:00 pm

Re: X7 DSP wiring to the K40 power module- Not firing

Postby Tech_Marco » Mon May 14, 2018 10:02 pm

Wow, you made me feeling proud of myself :lol:

The password is "608"

It is so odd that the motor could get that hot with 0.3A.
A stepping motor can sustain up to 80'C without worrying demagnetized. A motor is OK being hot but shouldn't be too hot. I always use this " rules of thumb" that if you can touch the motor for over 3sec, then it should be fine. If you can hole on for more than 2sec, something must be wrong.

Then worst scenario is that the motors came with your machine maybe low quality made. Maybe you should change it


-Marco


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