Triac vmc draw bar

All info relating to the Denford Triac series of CNC milling machines

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George P Pan
Posts: 9
Joined: Wed 26 Oct , 2022 12:11 pm

Triac vmc draw bar

Post by George P Pan » Mon 22 Jan , 2024 14:58 pm

Hello everybody

I am having issues with the drawbar of a triac vmc .
When I was performing a tool change the drawbar couldn't push enough to release the tool . I send the drawbar for repair as the oil seal was ripped off. The draw bar came back repaired and after the installation the same problem. I thought that the problem should be the washers or the rod so I disassemble the lower part but I couldn't locate any problem. I contact again the repair shop and they told me that they can not check the drawbar because it is too small for their machines. So is there any manual or guidelines for the repair of the draw bar and the rod washer system? How much force should the draw bar apply to the rod?

Thanks a lot
Regards George
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moray
CNC Apprentice
CNC Apprentice
Posts: 97
Joined: Thu 12 Sep , 2013 20:02 pm
Hardware/Software: Triac VMC

Re: Triac vmc draw bar

Post by moray » Mon 22 Jan , 2024 21:19 pm

On my Triac the toolholders often wouldn't release when the pneumatic cylinder was activated, and after checking the oil level in the cylinder, which was OK, all it needed was a little adjustment to move it down nearer the drawbar.
I've not had any problems since.

George P Pan
Posts: 9
Joined: Wed 26 Oct , 2022 12:11 pm

Re: Triac vmc draw bar

Post by George P Pan » Tue 23 Jan , 2024 10:02 am

I have tried everything nothing worked for me

Martin
CNC Guru
CNC Guru
Posts: 1898
Joined: Fri 24 Feb , 2006 17:09 pm
Location: Brighouse

Re: Triac vmc draw bar

Post by Martin » Thu 25 Jan , 2024 12:10 pm

You will need to adjust the tension as per the attached link with a tool in the spindle.

viewtopic.php?f=51&t=6226&p=25626&hilit ... der#p25305

George P Pan
Posts: 9
Joined: Wed 26 Oct , 2022 12:11 pm

Re: Triac vmc draw bar

Post by George P Pan » Wed 14 Feb , 2024 11:21 am

Hi Martin

Can you help me more
I read the topic so I insert a tool and adjust the 10.5mm for the fist locknut to the top of the drawbar . The washers are all opposite each other except the top and the bottom is that correct? I think that was the position when I disassembled them?
Also I have to adjust the lower part of rod? meaning the pulstud holding mechanism ?
Should I do anything else?
I can send you a video also because i can't uploaded
Thanks a lot
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Martin
CNC Guru
CNC Guru
Posts: 1898
Joined: Fri 24 Feb , 2006 17:09 pm
Location: Brighouse

Re: Triac vmc draw bar

Post by Martin » Thu 15 Feb , 2024 9:23 am

Hi George

Can you send a video to technical@denford.co.uk

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