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Hi Paul,
OK, MAX232N is fine, if it was the A-version the caps surounding the IC should be 0.1uF instead of 1uF like they are now but since you have the N-version you should be OK.
Take your time and let us know what you find! Good luck!
/Henrik.
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H.O. & Kreutz,
Thanks for the guide for working on #4 drive. I'm hoping that tomorrow will give me the necessary time & energy to take advantage of them. I had a little time this afternoon so I installed the three drives X, Y, Z. I've got the BOB hooked up, the 15vdc PS hooked up with the drives installed on their mounts & the mounts in the cabinet. I need to chase down two additional USB cables. I think I have everything on hand to wire the delay timer in for the High Power so things are going well. BTW the MAX232's I'm using are the MAX232N. I need to take a couple of pictures for here so that it'll make more sense for the other readers.
Thanks Again, More Later
Paul
Hi Paul,
OK, MAX232N is fine, if it was the A-version the caps surounding the IC should be 0.1uF instead of 1uF like they are now but since you have the N-version you should be OK.
Take your time and let us know what you find! Good luck!
/Henrik.
good evening All,
I finely got some time to check drive #4 as suggested. starting with H.O.s suggestions, on U10 pin #2 shows +9.15 pin #6 shows -8.73. Moving to Kreutz's Pin #16 shows 5.08 volts. there wasn't a response Ds4. After checking I replaced the socket that the UHU chip fits in. then as expected Ds3 the power led blinks and stays on. Ds1 now blinks and stays on unless I have the encoder cable plugged in, at which point it's out. Ds4 the ready led is on solid. it gives a little blip on resetting and stays on. Ds5 does not light at any time. I'm slowly going through all the joints in the RS-232 cable area. so far I changed capacitor C-18 to be sure one terminal had not been pulled loose in the can. I'm thinking of resoldering U-11, U-13 & U-12 next unless you guys have other suggestions............
Paul
BTW per Irfans suggestions I'm making up some schematics showing what I intend to do next with the mill wiring to see if you all approve & or have have suggestions for improvements
Hello Paul;
Please, check U11 orientation and re-solder its pins, carefully measure voltage (+5V) between pin 1 and the +15V power supply ground terminal. Also measure the voltage (+5V) between pin 8 and PC_GND, if it does not communicate after that, please, replace U11.
Best regards,
Kreutz.
Hello,
I've got a rough draft for the E-Stop circuit based on what I have & what little I know. the relay I have requires 12vdc and the existing E-stop uses 24vdc. Am I correct in assuming that a resistor can be inserted in the circuit to use the existing 24vdc to the 12vdc relay. Anyway, Look this over & give me some help here....... As I finish the other required circuits I'll post them
Thanks
Paul
Hi,
I've sketched up a quick control circuit for the 134vdc to the HP UHU drives, again I'm open to suggestions..................
Thanks
Paul
Hello Again,
After I posted the High Power I remembered that I had toyed with the Idea of getting the 12vdc control voltage from the PC when It was turned on.......
This assumes that the PC is always turned on last. This would probably be OK.
When the PC is powered up it will supply the USB voltage to all the HP UHU drives. the 15vdc will be powered by 120vac power as tapped off T2. So 15vdc would be available to the drives as soon as the master switch on the mill is turned on. then when the PC came up any fiddling by windows would be done when the 6 second delay has expired & the 134vdc is available to the drives.......
Thanks
Paul
Hi Paul,
I'm not sure I follow your E-stop schematic so here are just a couple of general things you should concidder.
You should never rely on the relay to energise in an E-stop condition. You should wire it so the relay is energised during normal operation and de-energises when you hit the E-stop. Perhaps that's how you have it already?
It looks like you have drawn two connecions on each HP-UHU....That's not right.... Even if it's me reading your schematic wrong you can't connect the Fault I/O's to GND like you've done - they will ALWAYS be faulted then.
I've attached a schematic that I think should work. As you see the relay must be a two pole relay. Also, you should concidder dropping the 130V supply to the HP-UHU's when in E-Stop. Otherwise, if a drive gets bad and you have a runaway it won't stop when you hit E-stop.
Running a 12V relay on 24V will work by adding a resistor as you've done. To calculate what value it should be divide 12 by the rated current of the coil. If the coils is rated 55mA then 12V/0.055A=218ohm, take the closest standard value you have available, it's not critical. The resistor need to be able to handle 0.055*0.055*218=0.66W so a 2W resistor would be a good choice here.
/Henrik.
Paul, just follow Kreutz's circuit for E stop - scrap everything else - henriks circuit is telling the same thing as Kreutz's.
no use going circles like me - learn from my mistakes
ok cya
Hello All,
I'm back, I have my I/O's fed the three USB cables & would have problems applying the E-stop to all drives. But thanks Irfan"s list & H.O.s advice I'll correct that. with any luck it'll rain today giving me a "free" shop day. I'm still at the point of having the three drives in & up on 5 & 15vdc. hooked up to the B.O.B. & servo power cables out. Z encoder cable is in & correct. X cables are in but need testing, the Y axis power cable is ready but the servo cable needs redone. I have both the Z & Y servo/encoder packages on the bench. the Z checks out OK but my bargain 500 line renco an't talking, guess I get to disassemble it & check the encoder & short cable to the connector, again. I picked up a package of encoders two years ago at the CNC get together. I've have mixed luck with them, some my learning curve & some that their specials that send reversed signals (Kreutz confirmed this). more as I proceed. it as time permits.
I now have a adj. time delay relay bringing the 134vdc up after the 5 &15vdc to the drives fixing that problem.
ONE point of note, many,many times I read of others problems that were a direct result of not pulling most if not all of the old wiring out of the control cabinet at the beginning of their conversion. READ & BELIEVE.
THE SECOND point I'd like to share: DO NOT temporary wire things planning to do it RIGHT LATER...... this too will eat you up sooner or later.
I now have the E-Stop circuit wiring sorted out that today should be the day it works .............. Push E-Stop button, 134vdc dropout, drives fault, putting Mach3 software into Reset. Thanks Guys, This has been a tough one for me !!!
Paul
Good job Paul!
Keep it up, take it slow and do it properly and you'll have your machine running before me. If you need assistance we're all here to help out!
/Henrik.
FOR EVERYONE'S INFORMATION THE CORRECT INDUCTOR PART NUMBER USED ON BOTH HP UHU DRIVES IS: PM2120-1R2M-RC
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