The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)

The Craftmans Shop > New from Old

<< < (154/260) > >>

cnc-it:
Here is a picture from the Siemens DC drive manual. Not sure if it's relevant here but worth a try :med:

https://drive.google.com/file/d/1_fheJGFmyK5layWUKvz-G2y88A2-c6_o/view?usp=sharing

awemawson:
Thanks old chap, but if you look 'up thread' I've already fixed this issue - it was the servo 'offset' adjustment.

cnc-it:
No problem Andrew. It's just that I had an Hitachi Seiki lathe that used a proximity sensor to position the turret like the Beaver here but it didn't back off and re position on the notch like yours does, it just stopped when it reached a tool position so that got me confused for a while :doh:

JeffK:
Hi Andrew

I have been following your progress and applying some of your fixes / checks to a Beaver TC20F I bought around Xmas (fool I hear you say!!)
I have got so far but have run into a few problems. Unlike your machine mine came to life fairly easily as it had been kept in a workshop but had not
turned for a couple of years. I can now jog the x and z axis and also the spindle but have not managed to do a zero return on it yet. I am not very
PLC proficient but did have some success with various overtravel issues etc.

My main problem is when I start everything up I get a x axis and z axis Pulco error which will clear when reset then following that I get the following:
'EX05 - The T-word is illegal, only t-words between 100 and 1299 are valid, present tool no. is 11'.
I jog in the negative direction as per instructions in the basic handbook I have but when I switch to zero return I get a second message:
'EX30 Axis on reference trip, select 'jog mode' then move axis in the negative direction.
With the mode set to zero return I can not jog the axis (though the manual reads as though I should be able to to return to zero). If I change back to jog mode
I can jog manually but with no zero return indication.

Initially - do you have a manual which explains the Beaver specific EX codes at all? If so would you send me the code explanations as they are not in my handbook.

Have you any ideas about the zero return? Should it jog back to zero (x-530, z-660) manually and give me some indication when in zero return mode or am I missing something?

Any idea how to reset the T-word error / message?

I noted that you spent some time initially getting the program format correct for moving the turret - can you let me know what the t-word format is as I have tried all sorts of formats and just get a 'start reject' message when I press the cycle start button. I was thinking this may also be because I haven't managed to do a zero return yet....

I would very much appreciate any help or ideas to get me a bit further... I have resorted to cleaning the machine now to make forwards progress though looking at the photos of yours I have a long way to go !!! There have been a few 'maintenance additions' to the machine by the looks of things in the back but I get the feeling I am not far away from getting things working properly - just limited by my own lack of experience with these machines....

Thanks in anticipation....
cheers
Jeff

awemawson:
Jeff - not fool at all - they are good machines.

My machine has no EX commands nor have I heard the term Pulco. Tool number have to be between 1 and 12 followed by a D term that defines which tool offset to use.

For turret operation on my machine it first has to pass over it's X and Z references (done by selecting the reference symbol on the mode switch and pressing AND HOLDING the appropriate jog button), and then the turret subsystem has to be initialised in MDI mode by executing an M80 command, followed when it has finished (takes 10 seconds) by "Tn" where 'n' is the currently presented tool. (Commands terminated by 'LF') The control won't do anything other than jog until this procedure is completed. Now your system may well be very different . . .

The problem is that your machine is the "20F" therefore has the Fanuc control, so very few of the commands will apply at low levels. Nor do I have any information on the Fanuc equipped machines.

Beaver fitted several different turrets to these machines, and the turrets were controlled by different servo systems. Mine uses Beaver made turret, and the Siemens AC servos, but controlled by a Baldor 'SMCC' card that is a stand alone CNC two axis controller subservient to the Siemens 820T. But I suspect that your system probably uses Fanuc AC servos controlling a Baruffaldi turret that Beaver bought in as a cost cutting exercise.

I suspect that apart from the mechanics of the machine and possibly the main spindle drive little is the same between our machines.

Can I suggest that you start a new thread logging your progress, and detail what units you have by way of controls and servos. Put up loads of pictures of the items and internal of the rear cabinets.

Navigation

 Message Index

Go to full version