Johnford vmc 550

[PatrickJay3]

We just bought this used cnc mill (JohnFord VMC 550) and wondering what should the level (psi) of compressed air coming into this machine ?

And how do we change tool in mdi ?

 

[Susquatch]

If you want meaningful help, you are gunna have to give us a lot more info than that! Most of us are hobby machinists, not mind readers.

Project Description?
Software?
Relevant tooling available?
Tooling being used?
Operator Skillset?
Lots of Pictures?

 

[David]

Found this on the web

VMC Series Vertical Machining Center Operation Manual (Electrics) | PDF | Numerical Control | Electric Shock

The document provides an operation manual for several models of vertical machining centers produced by Shenyang Machine Tool Co. It contains safety information, descriptions of machine parts and functions, operating instructions, and maintenance procedures. The manual instructs operators to read...

www.scribd.com

 

[Janger]

Found this on the web

VMC Series Vertical Machining Center Operation Manual (Electrics) | PDF | Numerical Control | Electric Shock

The document provides an operation manual for several models of vertical machining centers produced by Shenyang Machine Tool Co. It contains safety information, descriptions of machine parts and functions, operating instructions, and maintenance procedures. The manual instructs operators to read...

www.scribd.com

I just hate that scrib d site. omg it's annoying.
and yes we'd love to see some pictures and detail sof the new machine.

 

[David]

I just hate that scrib d site. omg it's annoying.
and yes we'd love to see some pictures and detail sof the new machine.

I just download whatever it is I'm looking for and never deal with the site.

 

[Susquatch]

I just download whatever it is I'm looking for and never deal with the site.

Must be part of your aura. I'm with @Janger on this one. That site will never let me just download. It wants to Fk with me first.

 

[David]

Must be part of your aura. I'm with @Janger on this one. That site will never let me just download. It wants to Fk with me first.

My mistake actually. I was thinking of manuals.lib

 

[Susquatch]

My mistake actually. I was thinking of manuals.lib

Ya, they are hit and miss for me. It usually works but about half the time the download is corrupted. A retry doesn't fix it.

 

[Chipper5783]

We just bought this used cnc mill (JohnFord VMC 550) and wondering what should the level (psi) of compressed air coming into this machine ?

And how do we change tool in mdi ?

Yeah, more info. That will depend on your controller. It should be in the manual. The tool change instruction is probably an M code (likely M6).
So you’d send it T6 M6 ;

For a DX32 machine you need the semicolon. For an A2100 machine the semicolon is optional (unless you are adding comments). On the A2100 you can specify going to a predefined location before doing the tool change - then it is M6.1

You do have the manuals, right? I’m probably just a slow learner, but after going through the manuals over, and over, and over - plus a lot of trial & error testing of every line one can get good results.

Air pressure? That depends. It should say in the manual. There should be an onboard pressure regulator. It is probably going to depend on what the air is being used for. On my mill the air is used for an air purge on the main spindle seal - that is regulated down pretty low (~15 psi?), but the regulator feeding the tool change cylinder is higher (like 90 psi). The mill has an alarm and safe shut down (more of an interrupt) if the air press drops off. Can you just set it a bit above the alarm point? On the lathe the air is only used to purge the X axis scale, it uses 90 psi air, then a very small orifice to get down to a reasonable purge volume (and no alarm, so I kick myself when I forget to put the air on).

Like Susq says, need more information.