Re: upgrade strategy

--- In CAD_CAM_EDM_DRO@y..., "Carol & Jerry Jankura"
<jerry.jankura@s...> wrote:

> You didn't mention which G-Code interpreter or operating system you

were

> running, but if it's a DOS based controller, make sure that you do

not load

> either EMM386.EXE or HIMEM.SYS through your CONFIG.SYS file. These

drivers

> tap into the computer's interrupt structure and sometimes have

enough

> overhead to cause an unstable pulse train. If the pulse train is

not stable

> (that is, acting as the interpreter would ask it to), the motors

will stall

> out at speeds lower than what you would expect.
>
> -- Jerry

Hi Jerry,

I may try some dos based controller later to see if that helps.

sorry for being a bit of a DOS and Windows illiterate, but couldn't
understand what the config.sys file in my computer mean. Is any of
the file figured in the config.sys file reproduced below:

[menu]
menuitem=HELP, Help
menuitem=CD, Start computer with CD-ROM support.
menuitem=NOCD, Start computer without CD-ROM support.
menuitem=QUICK, Minimal Boot
menudefault=HELP,30
menucolor=7,0

[HELP]
device=oakcdrom.sys /D:mscd001
device=btdosm.sys
device=flashpt.sys
device=btcdrom.sys /D:mscd001
device=aspi2dos.sys
device=aspi8dos.sys
device=aspi4dos.sys
device=aspi8u2.sys
device=aspicd.sys /D:mscd001
devicehigh=ramdrive.sys /E 2048

[CD]
device=oakcdrom.sys /D:mscd001
device=btdosm.sys
device=flashpt.sys
device=btcdrom.sys /D:mscd001
device=aspi2dos.sys
device=aspi8dos.sys
device=aspi4dos.sys
device=aspi8u2.sys
device=aspicd.sys /D:mscd001
devicehigh=ramdrive.sys /E 2048

[NOCD]
devicehigh=ramdrive.sys /E 2048

[QUICK]

[COMMON]
files=10
buffers=10
dos=high,umb
stacks=9,256
lastdrive=z

>
> |I have upgraded the power supply to a 36VDC secondary, and reading

at

> |the rectified, filtered output showed 59VDC. However the G201 still
> |can only manage 14ipm with the Sherline and 3.2V 2A steppers (half-
> |coil) with set-resistor 18 ohm. Seeing other reporting much higher
> |speed, I can only assume that the following may be the cause of the
> |low performance:
> |
> |1. unshielded 22AWG motor cables (less than 2 feet)
> |2. less than satisfactory pulse train. (deskNC for windows)
> |3. unshielded data cables. (used stranded cables before. Now

replaced

> |with solid core twisted pair taken from those cables used for

wiring

> |computer network)
> |
> |The problem is getting suitable shielded cables. Supplier only sell
> |such cables in large roll. Any suggestion how I can begin to try to
> |tackle the above?
> |
> |Thanks
> |
> |keongsan