Printable View
I am replacing my 30K scanners with DT-40 Pro`s. they come with a pot for gain control. you can connect the input to the amps with either _ signal or + signal can anybody tell me which way I need to connect it to work with EasyLase dac?
Also the X and Y input to the amps use a common ground should they just go to pin 25 instead of 14 and 15?
Here is the PDF.
http://www.dtelectronic.cn/DT-40proUserManual.pdf
Look at terminal J-1 and see if the two middle terminals are bridged. Looks like the Dsub 25 pin cable MAY wire as follows::: X pos signal from pin 1........14 is X gnd. Pin 2 is Y pos.......pin 15 is Y gnd. The pair of X signals going to X axis driver amp and the pair of Y signals going to the other amp for the Y axis. You might want to check me here as I have not had the chance to get a set of these guys. I would bet Spec would know for sure. It doesn't look like a single ended setup. Marconi may have input here as well. They just don't seem to give all the info needed ...I am still looking over the pages..................
Quote:
Originally Posted by MechEng3
The problem is the Input has only one shared ground for both X and Y.
:idea: Looks like you will have to set it up as a single ended connection.If this is how you set it up don't forget to use 4.7 K ohm pulldown resistors on the grounds! See the Easylaseinterface manual, pages 8 and 11. If you don't have the manual . The outlines were available on JMLaser's web site. If you can't locate it let me know and I can send you a copy on Thanksgiving day. Still I would ask Spec to step in here....I know he has used this scanner set.
Dont the DT40pro's have seperate amps for the x and y?
Just reading your post again I think you meen do you need to use the ground on the amp inputs.
Just connect pin1 of the DB25 to the + pin of J1 and pin14 to the - pin of J1 on the X amp, then pin2 to the + pin of J1 and pin 15 to the - pin on the Y amp.
Ignore the G pins.
Jim
Ok, I am not sure I explained the problem so here are some pictures. This is the cable-pot supplied with the system and the input on the amp.
http://www.pbase.com/astroguy/image/70644577.jpg
http://www.pbase.com/astroguy/image/70644578.jpg
http://www.pbase.com/astroguy/image/70644836.jpg
As you can see there is only one ground for both X and Y going to the ilda.
And there is only two ways to plug the cable onto the amp.
Easylase: Connect X- and Y- together to Pin 25 (Easylase GND). Connect the 3 signals (X+, Y+ and GND) to the DT40 Pro cable. Red=X, White=Y, Black=GND.
Connect the small plugs to the right 2 pins. ("Gnd" and "Signal-"). Leave the left two disconnected! this is the right way! I hope you understand me.
Greetings
I think so. The conector with the X+ Y+ and ground. I take that ground and connect to pin 25. X+ and Y+ to pins 1 and 2 and no conection to pins 14 and 15?Quote:
Originally Posted by Starburst
Fred;
Have a look at Starburst's post again. He said to connect pins 14 and 15 (X - and Y -) to the ground on pin 25, which is the common ground. Thus your X and Y grounds will be common to pin 25.
Like Mecheng3 said, this makes it a single-ended connection. (Much like the F2000 unit that Dreambeamz has...) Not sure where those 4.7 K resistors are supposed to go though. (Between pin 14 and ground and pin 15 and ground?)
MechEng - would you elaborate?
This is basically the direction we were headed last night. Nice to have some more input though!
Adam
the 4k7 resistors are not needed with easylase! The resistors are only to protect other cards.
Quote:
Originally Posted by Buffo
I got now duh.
Dam what a pain in the ass. What ever happened to ilda standard??
Well I don`t have any 4.7K resistors so I cant even fire it up :-(
What if I just eliminate the pot and just go strait from the amps to the db25?
I don`t really need the gain control. I can do that in Mamba.
Starburst said you don't need them with the easylase unit. (You must have just missed his post...)
Adam
I would just do it that way, after all like you say you can do it in mamaba.
When my DT's arrive from Jian :lol: I won't be using the pot.
Jim
Yes I was still typing my post when he posted his.Quote:
Originally Posted by Buffo
http://i24.ebayimg.com/04/i/000/7a/07/fb55_10.JPG
That is so easy,like a cd-play connect to amplifier.
I find the old connect picture.
Hope you can understand.
http://i15.ebayimg.com/02/i/000/7a/08/8b14_10.JPG
http://i8.ebayimg.com/05/i/000/7a/08/8715_10.JPG
Thanks for all the help. I have it up and running. I thought that was the way to connect it but wanted comfirmation just in case,
didn`t want to blow something up. It is running fine now but I did not tie pins 18,19.20 together with the rest of the - pins.
Do I need do this? :?
Now I need to let Chuck know that the blanking on the red starts to show tailing after 30K.
Again thanks to all. :D
:D Glad you got it going! The pulldowns are to protect other chips from
bias interference and a possible rise in voltage above 5 vdc. They are to be placed
at the 14 and 15 # pins{X and Y gnd} tied into ground as well as pins 16,18,19, and 20.
See if this will help..........http://photonlexicon.com/gallery/album51/ildastd052
Hope this helps.
:D Here is the pdf link.........[/url]http://www.jmlaser.com/downloads/Users_Manual_EasyLase_USB.pdf[url]
Concerning the DT40 Pro scanner input hookup,
The DT40 Pro amp has 4 input pins so you can connect the laser output card, X and Y individually, to the positive or negative driver amp input. The first 2 pins on the input connector, as shown in the users manual, http://www.dtelectronic.cn/DT-40proUserManual.pdf
are + and Gnd, the next 2 are gnd and neg. So plug it in using the plus or neg input pins so the image looks right.
Safety pins- no connection, for testing only.
Grounds- I don't know about the EzLase, but pin 25 is ground for the Ilda connector and the Alphalite output connector.
Write if I can help more with this of any other info. RickGebhardt@msn.com
Rick
-----
Welcome to PhotonLexicon, Rick!
Knew you'd get around to joining us here sooner or later... :wink:
Guys - Rick is one of the distributors for the DT-40 scanners. But more to the point, he's the developer and distributor of the Alphalite software and hardware for laser shows.
Glad to see you here pal...
Adam
Greetings Rick! :D
Well hello Rick! Hows the weather up there?
Yep, he also developed PCLite many years ago and I was the proud owner of a kit that I put together. I think I still have the old PCLite software around here somewhere. It was pretty basic in what it could do, but was alot of fun to work with!Quote:
But more to the point, he's the developer and distributor of the Alphalite software and hardware for laser shows.
David
Hi Rick :)
You are so latecomer join here :wink:
Well I am very happy with the DT-40 pros.
They make a little more noise then the 30`s I had, but I like them.
Also the amps have to have a fan on them,
even when mounted to a very large heat sink they get very warm.
My other amps never got hot at all when mounted to the same heat sink.
From now on I will be using these in all projectors I build.
Some noise from the mount's heat sink.The mount heat sink can create resonance.Quote:
Originally Posted by Astroguy
When you hold it,the noise lower. :)
suggest:
Don't use fan resolve the hot of amps.
mounted a large heat sink or install the amps to the case housing better.
Because some amps parts must warm to stabilization.
I always adjust the amps after the scanner working 5-10min.
Sorry for my bad english. :shock:
Do you understand?
Yes I understand. I will not use fan. They are mounted on a very heacy and finned heatsink which is then mounted to the case.Quote:
Originally Posted by jian725
the case is well vented with 2 fans.
Thanks
Fred
Well as luck would have it, if I had any luck. The Y scanner amp went out on me tonight. I turned on the system and the leds lit up but no output to the Y galvo. I checked the galvo with the other amp and it works fine so it is the amp. DAM I am so mad I could rip someone's head off, well not really but I am pissed!! I guess I will have to see how Jian handles this, I just sent out an e-mail. If I have to ship it back to China I will NEVER NEVER buy a set of scanners from China again. It is just too darn frustrating to deal with. The last time I had to send something back to China it cost me $103 to get it there in 4 days Fedex and it was just 2 lbs ???? :evil: :evil: :evil: :evil:
I will let everyone know how this gets worked out just in case your ever in this situation. It just sucks :cry: :cry: :cry:
Fred,
Are you certain its getting signal from your dac? Did you try swapping the input cable? I'd be surprised if the amp was blown. Is it a DT-40pro amp or the original dt-40 amp? There's not a whole lot to that amp and I would be happy to look at it if you like.
David
Yes it is getting a siganal and I found the problem, The on board fuse was blown. I replaced it and it is up and running. I checked all wires and every thing is fine so I don`t know why it blew the fuse when I turned it on?? :?:Quote:
Originally Posted by DZurcher
Boy I was so mad I could have spit nails but after I cooled down I traced out all conections and found the blown fuse. Well see how long its runs this time.
phew, glad to hear you got it running! It is interesting that it happened in the first place. The fuse may be a bit under-rated for the job. Could have popped when the caps on the amp were charging normally.
David
Quote:
Originally Posted by Astroguy
Please find what happen and I want to ask you:Do you have enough electronic knowledge?
So easy input connect X/Y and public earth only you can not resolve.
usually if you average service and don't overdriver the scanner ,the fuse NEVER blown.
The fuse of the function for protect the galvo,if without error,it NEVER take effect.
PS.
When I send out the scanner,you have not write any to me,even you receive the scanner and the connect problem and fuse problem. :!: :!: :!:
I'll bite the bullet here... jian you seem to have vast knowledge and I hear you products are awesome. I have a set of dt40s on the way from cruch... :D
But with the grammer... barrier, it's very hard to understand what you are. I think we need a much better translation software. The words are OK, they all end up in the wrong places... That last question was about all I could understand. :?
No offence...
Is there any place we can all go for translations? Or should we all pitch in for jian some grammar lessons? Or all of us learn chinese? Jian, you're probably smarted than us, it may be up to you. :lol:
我了解 :lol:
Jim (吉姆).
:shock: :shock: :shock:Quote:
Originally Posted by JimBo
Old DT-40?Quote:
Originally Posted by allthatwhichis
If you not approving the old DT-40,contact me update the to DT-40pro. 8)
All right,the language problem always with us.But never mind,we can time after time contact,
finally we are all understand. :) :) :)
I did a google translation.Quote:
Originally Posted by jian725
It says "I understand" and "Jim".
Jim
Quote:
Originally Posted by jian725
I have sent you a few e-mails including the one about the fuse. I don`t know why you are not getting them. And yes I have the electronic knowledge I am a service manager for a Yacht manufacture in Taiwan and have been installing electronics and radar for years. I may not have the knowledge that some of the people on this forum do but this is not the first scanner I have built.
When the fuse blew the system was not running, it blew as soon as I turned it on and I never over drive the galvos I run them at 35K. I set the gain so I have a 12" ilda test frame at 7 feet from the scanner running at 30K which is about 7 deg. the ilda standard. According to your specs I should be able to run at 40K at this gain. If I am wrong please let me know. And please know I am very happy with the perfomance of the scanners it was just very frustrating haveing this happen so soon after getting them running. Sorry if I took out my frustrations on you and this forum. I hope you understand.
Translation tools are just not good enough yet. :( There is no substitute for a human being that can speak both languages fluently.
I lived in Germany for 6 months when I was in High School, and I still remember enough German that I could get by if I had to over there. But when I try to write a formal letter to a company in Germany, I frequently use automated translation tools.
Even with those tools, and my knowledge of German, there are times that I end up getting it wrong. And that is with a language that is still reasonably close to English in terms of grammar rules and sentence structure. (Chinese is *completely* different!)
I appreciate that Jian is doing his best to participate here in these forums. And I understand that trying to have a technical conversation in a foreign language is incredibly difficult. I'm willing to give him the benefit of the doubt when something he posts sounds funny or odd. Imagine how funny it would sound if we tried to post in Mandarin (or worse, Cantonese)! (shudder) :shock:
Fred: I understand your frustration pal... You've had some bad luck recently, and that can really sour you on this hobby. But hang in there. (And I'm really glad to learn that it was JUST a blown fuse...)
Jian does have a point though: if the drive voltage is set correctly, the fuse should never blow, which makes me wonder why it did fail... I guess you will have to watch it closely and see if it happens again.
Finally, Jian - you mentioned something about an upgrade (or update) plan for people that have the DT-40 scanners if they want to get the DT-40 PRO scanners. What are the differences in performance between the two, and how much does it cost to upgrade? (I'm just curious...)
Adam
I think Jians english is fine, I always manage to understand perfectly.
Jim
I am dumbass to begin with. English is my first and only language and I can barely manage it... :roll: :wink: Playing too much soccer as a kid and using my brain as the ball... :shock:
I've never been into football :o
That's probably why I understand Jian :lol:
Jim
See, we don't even say it right... :lol: :wink:
:lol: LOVE IT! :lol:Quote:
Playing too much soccer as a kid and using my brain as the ball...
Like the old "Cheech and Chong" routine where they're pretending to be a couple of dogs... One says to the other, "Hey, let's go chase cars and get high off the exhaust!" The other replies, "Oh, no way man... That stuff can give you BRAIN DAMAGE!" "Brain Damage from car exhaust?" "No, brain damage from getting your head run over by the rear wheels, man!"
Priceless...
Adam
So I wonder why you don't write to me and find help on forums.Quote:
I have sent you a few e-mails including the one about the fuse. I don`t know why you are not getting them.
Now I understand why you are so frustrating 8) 8) 8)
I am so sorry.Please write my another email address: jianpeixu@hotmail.com I think that is ok.
Or using the forum PM write to me.
Also I send the email to you always back ,so I let RICK tell you the email alway back,do you get the message from RICK?
Real,I understand ,les's forget the displeasure .Don't think about again what happen,continue enjoy DT scanner.Quote:
Sorry if I took out my frustrations on you and this forum. I hope you understand.
And I will provide the best service ,support and products.
Thank you.I like photonlexicon :PQuote:
I appreciate that Jian is doing his best to participate here in these forums.
Most when the glavo lost the feedback signal,the shaft will go to ONE direction only the current and torsional force very high ,not in center.I put a rubber for protect the the shaft,so that time the fuse take effect .anyone understand?heheQuote:
Jian does have a point though: if the drive voltage is set correctly, the fuse should never blow, which makes me wonder why it did fail... I guess you will have to watch it closely and see if it happens again.
DriverQuote:
What are the differences in performance between the two, and how much does it cost to upgrade? (I'm just curious...)
1.Driver and output speed matches together.(Driver is set too fast or output speed of computer is too slow. The inner circle is larger than the green square.)
2.Add the RC4200 for high frequency safeguard.(Old driver without RC4200 safeguard)
3.RoHs standard.(commonly)
4.more precision (difference not much)
5.the performance same with the CT's driver(The old driver set to fast,so The inner circle is larger than the green square)
6.symmetrically signal input.(The old driver without symmetrically intput)
Galvo(more importance)
1.the axis can endure max 120 Celsius.(old axis 80 Celsius).
2.coil can endure max 180 Celsius(old coil 90 Celsius).
3.new coil facture .more symmetry,so will more precision .
4.new assemble technique ,very very low vibration(noise).(the old galvo still hear some noise,maybe > a 6cm fan.
but the new galvo's noise will < a 6cm fan.
anyway the update of the driver you can see it,the galvo looks same with old ,all change you can't see them.
but these no other than importance.
I just go to school 9 years only,up to high school. :cry: :cry: :cry:Quote:
I think Jians english is fine, I always manage to understand perfectly.
So all friends all understand what I say :lol: :lol: :lol:
Jian;
Thanks for the details between the DT-40 and DT-40 PRO scanners!
How much $$$ to upgrade?
Adam
I send the DT-40pro X/Y galvo and X/Y driver to you .
Price $300 include shipping cost.
important: re-start warranty 2 years. :wink:
Oh,I am sorry,forgot tell you .
You don't need back the old set to me.Because the shipping cost to me very expensive.
The old set if for beamshow no problem,just the temperature and stabilization problem.
What happens to my old scanners then? Do I send them back to you? How much does that cost? (Or do I get to keep *both* pair?)
I'm really interested now!
Adam
Jian, thanks for understanding. I still cannot figure out what caused it to blow. The only thing I can think of is a loss of siginal or a spike from the easylase. after replacing the fuse I used it for one hour strait with no problem. I will run it some more tonight.
:shock: WOW! :shock:Quote:
I send the DT-40pro X/Y galvo and X/Y driver to you .
Price $300 include shipping cost.
important: re-start warranty 2 years. :wink:
You don't need back the old set to me.Because the shipping cost to me very expensive.
The old set if for beamshow no problem,just the temperature and stabilization problem.
That's a deal that I simply can't refuse, Jian! 8) Do you accept PayPal? Visa? Cashier's Check? Let me know, because I'm ready to upgrade right now!
Adam