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Messages - joeaverage

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731
General Mach Discussion / Re: Looking for help with a spindle motor.
« on: April 07, 2022, 08:29:57 PM »
Hi,
note also that you have selected PWM as your spindle control mode? Is that what ypou want? I thought you wanted to run Step/Dir, in which case uncheck
the PWM box and check the Step/Dir box.

Craig

732
General Mach Discussion / Re: Looking for help with a spindle motor.
« on: April 07, 2022, 08:24:07 PM »
Hi,
click the drop down menu, you can use vastly more than 32kHz.

My new servo driven mill runs 416kHz to each of the three axis servos and 466kHz to the C axis....so yes you can use way more than 32kHz.

Craig

733
Hi,
this post should be on the Mach4 General Discussion Board, no doubt Tweakie will shift it there in due course.

Quote
Is it possible for Mach4 to remember and record the last machine coordinates on shutting down?

Yes it can. Couple of different ways.

One idea is to put some Lua code into the Screen Unload script, this script runs at shut-down. You can record machine coordinattes, or any other values in the .ini file usig:

Code: [Select]
LUA Syntax:
int mcProfileWriteInt(
number mInst,
string section,
string key,
number val)

Description:
Write a long value to the profile's INI file.

and similar APIs.

At start-up you can read those values back into Mach from the .ini file using:

Code: [Select]
LUA Syntax:
retval, rc = mc.mcProfileGetInt(
number mInst,
string section,
string key,
number defval)

Description:
Read a long value from the profile's INI file.


Another alternative is to establish some  instance registers using the Register plugin, and make those registers persistent. Then at shut-down (Screen Unload script)
you would update the registers with the current machine coordinates. After start-up the registers would be repopulated with the values that had been recorded at the
previous shut-down.

The question is what are you going to do with them?. You cannot program the machine coordinates of Mach at will, not with Mach3 nor with Mach4.
If you quote this:

Code: [Select]
LUA Syntax:
rc = mc.mcAxisSetMachinePos(
number mInst,
number axis,
number val)

Description:

I will tell you....try it! It DOES NOT set the machine coordinates.

The ONLY way you can set the machine coordinates is by use of referencing, also called homing, and intelligent use of HomeOffset parameter.

You are trying to do as many have tried before, and failed, myself included. There is only one way to set machine coorinates and that is by Homing at the start
of each and every session. If you have good home switches you could get to well under 0.01mm repeatability....I do. I can shut down Mach,
come back the next day, re-power, Home, and then go to the WorkZero established by the G54 of the last session within next to nothing.

Craig


734
General Mach Discussion / Re: Mitsubishi AC Servo Spindle Retrofit
« on: April 05, 2022, 05:50:59 PM »
Hi,
I really only suggested Delta as an example of a type that has both bus protocol OR regular Step/Dir (or analogue) drives.

What I suggest you do is find if Mitsubishi made a regular drive for your motor. By regular I mean a drive that can accept Step/Dir or analogue inputs,
as is common with almost all AC servos.

Craig

735
General Mach Discussion / Re: Mitsubishi AC Servo Spindle Retrofit
« on: April 04, 2022, 11:00:42 PM »
Hi,
some years ago I came across a big industrial plasma/oxy-fuel table, it was about 8m long and about 4m wide, a big sucker.

It had Mitsubishi servos and a Spanish(?) made drive Loggio....or something like that. They used the proprietory Mitsubishi bus protocol.
I can only assume the Spanish company  paid a licence fee to Mitsubishi.  The problem was that the drives kept blowing up, and they were $2500NZD each.

I suggested to the company that they get rid of the Dynapath control, which provided the bus control data stream to the servo drive, with a PC and Mach4 with a Hicon motion control.

To do this we used the more normal 'regular Mitsubishi drives' which have all the regular input features of all modern servos, ie Step/Dir input. We got four drives for
$1000NZD each and away we went. To my knowledge the same combination is in use today, eight years later.

May I suggest that you take a look at Delta servos. If you do you will find that they produce a number of different drives, including a bog standard Step/Dir input (or analogue)
but also various bus protocol types including Ethercat. The Ethercat model MUST be used in a Ethercat environment, its not possible to feed Ste/Dir into it.

Want you need to do is establish whether Mitsubishi made a regular Step/Dir (or analogue) input drive for your servo. If so then Mach3 would have no trouble driving it, but your
existing bus protocol drive is a no-go.

Craig

736
Mach4 General Discussion / Re: Crash after tool change
« on: April 03, 2022, 03:53:25 PM »
Hi,
look at the diagnostics page. If a tool length offset is applied it will be listed.

Clearly you have a problem with offsets.

Craig

737
Mach4 General Discussion / Re: Crash after tool change
« on: April 03, 2022, 02:55:02 PM »
Hi,

Try editing this line:

Code: [Select]
N115 T2 M6 D2 H2
Remove the D2 and H2, they apply the tool length and tool diameter offsets.

Craig

738
Mach4 General Discussion / Re: Crash after tool change
« on: April 02, 2022, 07:36:53 PM »
Hi,
I can see two lines, N50 and N140, they both have a g43 in them. Do you really intend to use tool length offsets?

Your zeroing procedure is like my own, because I have a manual change mill I have touch off each and every tool,
and I zero the z axis but specifically DO NOT USE tool length offsets.

With an ATC mill each tool is measured and ascribed a tool length offset from the master tool and stored in the tool table.
Each time that tool is called and fitted into the machine you use a g43 hnnn, where nnn is the new tool number, and that tool length offset
is applied such that the tip of the tool is exactly where the tip of the master tool would be. Is that want you want
to do?.  If not then get rid of any and all g43's....they will cause crashes UNLESS you specifically require them and use them as intended.

Craig

739
Mach4 General Discussion / Re: Crash after tool change
« on: April 02, 2022, 03:45:27 PM »
Hi,
just had a much closer look at your video and you have a line:
N50 H43 H1 Z2

That's where your tool length offset is being applied. Tool length offsets work really well PROVIDED you keep clear in your mind what offset is being
applied at any given time. If you don't keep a track of it the DON'T use them.

Craig

740
Mach4 General Discussion / Re: Crash after tool change
« on: April 02, 2022, 03:39:59 PM »
Hi,
my only guess is that you have tool length offset active.

I notice that while you change to tool number two, the tool length stays the same as tool one.

Try putting a g44 at the top of the code and try again.

Craig

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