Thanks for everybody's reply. Roy I do have the ground pin as you pointed out thanks. Simon I disconnected transistor circuit form BOB and measured voltage on all drives both step and dir and the reading range from 11.5 to 12v. I've then connect up x axis to BOB, motor is quite when dir is active hi...

Just an update on where I'm on with the conversion, I've uploaded some new photo's. I've soldered step and dir cable's on to the back of the motherboard which are connected to the homemade voltage amplifier circuit, which is then connected to the BOB. Well how did I get on, The first time I switched...

Just an update of where I'm up to so far. I've soldered two cables onto the back of the motherboard see photo's 2 and 3. On photo 2 I've removed z axis driver card. you can tie the step and direction by using the two small holes below the numbers 30 / 32. This can be repeated for the other axis. I t...

Hi Comet I've soldered up the transistors and have checked with a multimeter what is going on with this circuit. I've put 5v in and I'm getting out just a wee bit less 4.9v I am not sure what really going on with this circuit. I'll hook it up to my z axis and give it ago this weekend and post my res...

Thanks Simon for your reply The reason I bought the mill was to help with my build of a cnc router to make all the motor/spindle mounts. I have already built the electric's for this project. I do plan to do a total re- fit for the triac with new driver cards, but that's way in the future. To save ti...

Hello, My Triac control died last week, so now I'm looking to covert to running on mach, piggy back style. I have tried to follow previous threads on the subject but I am struggling with the basics. Electrics are not my strong point. I have taken a photo of my electrical cabinet. The first question ...

Hi Mr. Magoo First I tried estop pressed in problem still there, then I checked earthing with mutli meter all of them seem good. then I removed every driver boards, mutli plug in the electrical cabinet and desktop pc still no change. Next I loaded most of the legacy DOS software. ( could not load fa...

Hi, Mr. Magoo About radius and tool comp I'm currently not using them in my programs. The problem has got worst as I can not even load the control software most of the time. When it does load I can load a saved cnc program and edit it. But when I go into manual to home the axis, the screen freezes u...

I have a vmc triac mill heidenhain controller using DDT, I keep on getting an error message, controller communications. Does any body no what this is referring too. The fault is intermittent. Any help on this matter would be gratefully received.

Kind regards Dale

I found the problem, at the start of the program it must have blk form details entered. The first line is coordinates of x0 y0 z enter maximum program travel (minus). Second line is size of billet. It does ask for min and max corner radius on each line but I am not to sure what radius it's referring...

Hello, can anybody help me with a Triac mill running Heidenhain 2.98 software using a desktop tutor. I'm having problems running programs which have more than 10mm Z depth, I've written my own cycle which moves incrementally -2mm then I label call and repeat 5 times program runs fine, if I change th...

Hello, Success, the mill came to life, I made a new part to fix the air leak, but it's no better then before, so added ATC 0 to heiden.opt and bingo mill start, I noticed on the solenoids for the ATC a lot of red pins out so I reset them but one kept on tripping, altered pressure until there was no ...

Hi, Enny I just found a leak on the one way valve which goes into the atc manifold, I broke the valve trying to fix it. I'm going to make a new part on my lathe tonight and see if the air leak was at fault. If still no joy I'll alter the the file as your instructions. I'll update my progress tomorro...

Hi Martin Program runs and simulates to the end and stops at either m30 or returns to start using m02, toolchanger is up. There is lube oil in the main tank next to the coolant pump. I've just noticed there's no oil in the oil tank around the back next to the air inlet regulator, but I see no electr...

Hi, Enny Thanks for the reply, I've add "cyc call m" and "L ix+20" etc .About the program feed rate, I got the mill from a college and this is one of the programs that was in the directory, I am just trying to run the machine in fresh air. I've checked the other programs in the directory and they do...

I've just acquired a 1993 denford traic vmc mill with air atc, heidenhain software v2.98, desk top tutor, I have no manuals and I'm new to milling, my problem is I cannot get the machine to move when running a program. Machine homes all axes fine, I can jog the axes and set new datum, I have air con...