Pauls HP UHU drive project

[tenmetalman]

Hello All,
Irfan has requested I start a thread logging my on going attempt to comvert my Bridgeport Discovery CNC mill. I've been struggling with this conversion for a long time & this is my third attempt to get it up & running using UHU's drives.,
As time goes on I will add pictures & verbiage to get you all up to speed with this attempt. For now I'm enclosing one picture and the following question.
I'm hoping to use the available 5vdc for my "E stop" circuit and an trying to make sure I'm hooking up the wires on the J8 & J9 connectors. If you would look at the picture & note I've added. do I have the terminals correctly identified for each position. If I understand the information on the " Step-Direction & Emergency Stop Interface page rev.1.0d dated 4/2/2008 that's page #5 of Hugo's schematics that he released 4/25/2008. I leave Jumpers "A" & "B" intact beings I'm using the existing 5vdc ?
So anyway. look at the picture & such & help he hook these six wires up correctly...........................
Thanks
Paul

[kreutz]

.......... If I understand the information on the " Step-Direction & Emergency Stop Interface page rev.1.0d dated 4/2/2008 that's page #5 of Hugo's schematics that he released 4/25/2008. I leave Jumpers "A" & "B" intact beings I'm using the existing 5vdc ?
So anyway. look at the picture & such & help he hook these six wires up correctly...........................
Thanks
Paul

Hello Paul;

Yes, if you leave the default jumpers traces (A and B) you are using the PC +5 Volts coming from the USB port. Then, there is no need to provide external +5V on that connector's pin.

If your safety circuit closes the EMG_Stop pin to PC_GND (short circuit them), your board will be disabled.

Best regards,

Kreutz.

[kreutz]

...If your safety circuit closes the EMG_Stop pin to PC_GND (short circuit them), your board will be disabled...

Kreutz.

HP_UHU. Suggested E_Stop circuit Schematics.

[contactirfu]

Hi Paul,

have you dry run your HP UHU's now all together? I mean all motors mounted but not connected to motion elements on the machine?

Henrik has used the BoB from cnc4pc and probably be able to help you also here.

RGDs
Irfan

[tenmetalman]

Hello All,
Well I've run into a snag. I've tried two different drives & two different UHU chips. When I start the mill,start the computer, then Windows XP I'm getting to the same point & the same problem. without turning the High Power power supply on. I'm using the UHU terminal program & get the same problem whither I start Mach3 then terminal or start terminal without Mach3 running. at the point that the mill & computer is powered up, with terminal running I apply the 15vdc to the drive expecting to see Uri's chip's message & parameters. what I get is one line of "M)5!) etc as shown in the attached photo's. One line of garbage & one segment of what looks like encoder tracking per attempt to apply 15vdc. after the verbiage stops I can not type anything in from the keyboard. What Now ?
Paul

[kreutz]

Hello All,
Well I've run into a snag. I've tried two different drives & two different UHU chips. When I start the mill,start the computer, then Windows XP I'm getting to the same point & the same problem. without turning the High Power power supply on. I'm using the UHU terminal program & get the same problem whither I start Mach3 then terminal or start terminal without Mach3 running. at the point that the mill & computer is powered up, with terminal running I apply the 15vdc to the drive expecting to see Uri's chip's message & parameters. what I get is one line of "M)5!) etc as shown in the attached photo's. One line of garbage & one segment of what looks like encoder tracking per attempt to apply 15vdc. after the verbiage stops I can not type anything in from the keyboard. What Now ?
Paul

Hello Paul;

Is the USB cable connected to the drive and the PC?

Best regards,

Kreutz.

[tenmetalman]

Well,
Some good news,and an issue that begs a question or two. Kreutz, Yes the USB cable was hooked in on both ends & working correctly. The Keyboard cable on the other hand had backed out just enough to not let the keyboard work. Your reply put me on the search that found it. My current status concerning drives is: none have had high power applied. Drive #1.) Does all it's suppose to up to this point. It gives the correct Handshake i.e. the UHU chip serial number & OK. It works with the terminal program to the point that I can check the settable parameters, change & save changes. Drives #2 & 3 give garbage as the handshake & a OK. From there on to the point I've stopped at they also do everything as they should ! ! ! all three of these drives know when the cable carrying the encoder signals are hooked up or not. Drive #4, the last drive built that has less changes than the other three is a problem child. It gives garbage for a hand shake, No (OK) & does NOT allow any communication to or from the terminal program. Nor is it able to tell writher the encoder cable is hooked up or not. So, suggestions as to what to look for ?
Paul

[kreutz]

Well,
Some good news,and an issue that begs a question or two. Kreutz, Yes the USB cable was hooked in on both ends & working correctly. The Keyboard cable on the other hand had backed out just enough to not let the keyboard work. Your reply put me on the search that found it. My current status concerning drives is: none have had high power applied. Drive #1.) Does all it's suppose to up to this point. It gives the correct Handshake i.e. the UHU chip serial number & OK. It works with the terminal program to the point that I can check the settable parameters, change & save changes. Drives #2 & 3 give garbage as the handshake & a OK. From there on to the point I've stopped at they also do everything as they should ! ! ! all three of these drives know when the cable carrying the encoder signals are hooked up or not. Drive #4, the last drive built that has less changes than the other three is a problem child. It gives garbage for a hand shake, No (OK) & does NOT allow any communication to or from the terminal program. Nor is it able to tell writher the encoder cable is hooked up or not. So, suggestions as to what to look for ?
Paul

Does the 4th drive light up any of the LEDs when powered?, did you measure +5volts at the 7805 output?

Any of the boards with less than 4.85 volts will probably output garbage on the RS232 connection because of the brown-out protection of the UHU chip.

If the 4th board is not responding to the encoder cable missing, there is some wiring problem, unless there are no 5 volts present...

I will take some time to write some troubleshooting instructions to use when first placing the board in service, things to check before and after powering up the +15Volts power supply for the first time... even before placing the UHU chip on the socket.

Thanks,

Kreutz.

[tenmetalman]

Kreutz,
thanks for the suggestions, I'll check all of the 7805's, I've got spares from other manufacturers that I can change out. I'm getting much better at changing components on a PCB. I've checked the USB power coming out of the computer and it's only 4.97. tomorrow I'll pull the cables out of the USB card I installed a while back and see if the power level goes up. either way it looks as I need to do something about the my 5vdc sources . I've currently got quite a load on the USB board and probably need to use the 5vdc available from the PC power supply I've installed in the cabinet and move more of the load to it. I'll also check it's voltage before and after...... I sure don't need a brown out condition occurring while running a program ! As to the 4th led, none of the drives show any indication of it lighting............... I hate to see you divert anymore of your limited time to writing a check out list. between the problems H.O., Irfan and myself have had or are having, We,re developing quite a check list on the fly............. Please get me those P&P fingers, the earlier I get them the sooner you'll have spares plus you'll be able to design other styles as needed and I can get them started !
Thanks
Paul

[contactirfu]

Paul have you planned on the bigger heat sinks? Mine look punny when compared to the heat generated.

[kreutz]

Kreutz,
thanks for the suggestions, I'll check all of the 7805's, I've got spares from other manufacturers that I can change out. I'm getting much better at changing components on a PCB. I've checked the USB power coming out of the computer and it's only 4.97. tomorrow I'll pull the cables out of the USB card I installed a while back and see if the power level goes up. either way it looks as I need to do something about the my 5vdc sources . I've currently got quite a load on the USB board and probably need to use the 5vdc available from the PC power supply I've installed in the cabinet and move more of the load to it. I'll also check it's voltage before and after...... I sure don't need a brown out condition occurring while running a program ! As to the 4th led, none of the drives show any indication of it lighting............... I hate to see you divert anymore of your limited time to writing a check out list. between the problems H.O., Irfan and myself have had or are having, We,re developing quite a check list on the fly............. Please get me those P&P fingers, the earlier I get them the sooner you'll have spares plus you'll be able to design other styles as needed and I can get them started !
Thanks
Paul

4.97V is a good voltage coming from the USB port. PC power supply voltagees are not that well regulated, anything from 5.25 Volts down to over 4.85 Volts is good.

Don't replace the components without checking the voltages first, if the 7805s are not regulating there might be a short circuit somewhere, they are protected internally and will come back regulating once the short is removed.

[tenmetalman]

Contactirfu,
Not at this time, I've always planned on using a small squirrel cage fan to move the air around the drives. what little time I've had with the drives working I've tried it both ways. Without the fan the heatsinks would get warm to the touch. After turning on the fan the heatsinks feel cool to the touch, Paul