- Joined
- Aug 19, 2013
- Messages
- 82
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- 8
How does one set the amperage on an x-drive? mine are fixed I think.
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Amazing phaser jimmy hope the diode works out!
Couple things. The X-drives are not meant to be paralleled. Hopefully we have just effectively stacked the resistors on them and are getting 1/3 the current of an individual one. I don't know if they can be damaged by doing that but I know I have been told running them in parallel by Lazeerer a no-no.
Also is your power source ground isolated from the heatsink the diode is on. These diodes are case/negative and the X-drive can not run with a continuous ground so if it was it could have bypassed regulation altogether and that may be why you are reading over 5A to the diode as from what I was told even paralleled they can not pass the 3A limit of the regulator.
Do you have a bench supply?
Hopefully Lazeerer can chime in.
I have the drivers isolated from the host like jayrob had. I get the idea of the case being positive. I just got bad info from the x-drive sale and info thread, about the drives being parallel able. I cut two of the drives out and even with only one drive it is still very dim. I may have harmed the diode... Ill get it. I am not giving up yet!
A kindly person has offered to help me if my electrical ignorance has caused the unthinkable. All is not lost yet.
Keep up the great work lazeerer !I am glade to see the drivers will be ready soon :yh:
I am ordering a new drive. I should be able to tell if I damaged the diode once I try the new driver. And on the bright side... The dimness of the diode makes fine tuning the focus much safer and easier. :tinfoil: silver lining!
Hey Guys Great builds.:wave:
A few things. Yes the X-Drive should not be paralleled as you can only get the MAX currant out of what 1 driver can deliver per the Max Switch of the driver. (4A)
So if you parallel say 3 drivers and there set to 3A each you wont get 9A but only a MAX of 4A. (USUALLY its much less when you do this)
These diodes are CASE +. (Slight correction to what DTR said)
So if using a driver that is NOT continuous Positive Like the X-Drive is NOT continuous Positive you must isolate the complete diode and its heatsink from the entire built itself.
In other words the diode and its heatsink must be floating.
AMC drivers are the only ones that are CASE + Driver Chips. However you must not make the mistake and buy a china one and not pay attention to the outer ring because its CASE-. Like Jay did in his thread:
http://laserpointerforums.com/f50/c-mount-red-mag-stubby-build-84462.html
Right now iam working on 2 drivers.
One this will go up to 5A that will have all the ramp up features i recommend for such high currant,
and
Iam also working on a custom AMC Driver with modes for a customer. Now this is not anything special and all iam doing is making a board that can take X amount of AMC chips and then just transfer the mode chip over. But i have been working on this for about 1 month now and final got some boards in the other day.
So of course i wanted to test it out on my own laser just to make sure everything is working correctly and i got good results.
The Driver has 13pcs AMC 350mA chips. These chips give out a little more currant so iam guessing that iam getting ~4500mA to 4700mA of currant and i made a video to show that its work just fine at such high currant.
So just be patient guys i will finish the drivers and you guys can have higher powers in your builds.
So for now stick to the ~3A that is available.
I know this is a contest but you dont want to make a mistake and rush.
I dont know when i will finish the drivers but iam getting there as fast as possible and more then 50% done with them. Promise.
Anyway Great build guys. Keep up the great work.
I just wanted to post the video as some still think that they dont like higher currant. (Even though there has been alot of user already (wont say the number) with no issues heard from about killing diodes)
GOOD LUCK.:beer: