What is a CNC Retrofit?
Changing the control of a
CNC machine is a CNC retrofit. The
updated control helps with latest features
as well availability of spare parts.
What is a full control retrofit?
A full control retrofit included drives and controls.
New electrical panel. Check spindle drives / dresser drives are included.
it. Operator training and application training are
included. Manuals and electrical prints. Macros are included for your
When would a machine warrant
a CNC retrofit?
If the iron is worth 100,000
USD, then the machine is worth retrofitting.
As a thumb rule, if the new replacement
machine costs 175,000 USD or above it is
worth looking into.
What NOT to do, during the
a) Make sure the outfit has
done this before and has been in business
for a long time. b) Go with standard
controls. PC based controls has a lot risks
in continued support for the next 20 years.
c) Get all the manuals. d) Get all the back
ups made including any SOURCE code and
Ladder logic. e) MAKE SURE THERE THE
PROGRAMMING/ MACROS ARE INCLUDED. In
grinding machine this is approximately 25K.
Would CNC onestop do
Yes we do retrofits of
special machines where the iron is worth at
least 100K or more. We have moved up on
the value chain and we do not do any low end retrofit. They are low margin business and
we would not be able to do justice to the
customer when it comes to support. We
support one customer at a time. We strive
for 100% customer satisfaction. Low end
retrofits do not fit our business plan.
Does that mean it is not
worth doing retrofit which are somewhat of a
Not really. You can do the
retrofit as long as you can cover all the
bases and it makes financial sense to you
What control does CNC
NUM controls are top of the line control made in Switzerland. NUM technology
is advanced in terms of architecture, servo design, and being able to do
PICO level positional feedback. NUM is big enough to be able to support any
specialized project, yet small enough to service and support all issues
locally. Their application support is unparalleled. You see NUM control on
high end machines like tool cutter grinder and machine, which make
positional control devices like scale.
You need super precision technology to do cutting tools and nano level
precision positional control systems. To manufacture a nano precision
product, the control should be able to process PICO level processing. We
chose NUM because we cannot go wrong with high precision control. The
distributed I/O and high density makes it easy to wire up a machine. Front
end is an open architecture, remote troubleshooting is easy, and Team Viewer
is compatible. If you are training / helping an operator run a machine, you
can do it from your desk or home.
If you are a supervisor and want to watch all machines run, you can do that
We use the nPad hand held pendant. It is handy to setup grinding process
using the pendant. The precision of the control, local support, and remote
features makes this control a retrofitter's dream. Easiness of the control
and the flexibility makes it versatile for the end user to program.
retrofit a drive?
drive is old and cannot get
parts or If you
cannot find a motor, If you cannot find the
Feedback device Example Encoder, Resolver or tach.
info is needed for a Drive retrofit?
Drive is A/c or D/c. 2) KW or HP rating of
the drive 3) What is the input voltage 110
or 220 3Ph or 440V a/c 4) Does the motor has
a feedback 5) What type of feedback does it
have Example Encoder, Resolver or tach. 6)
Spindle drive or a servo drive 7) What are
the inputs used (Like drive enable, estop..)
8) What are the outputs (Like Drive ready,
Alarm, Zero speed etc)
are the phases and how long does it take?
Planning phase 3 hours 2) Research phase on
matching a drive 2 to 4 hours 3) Drawing
prints for the new drive - 2 hours 4) Wiring
phase - 3 to 12 hours 5) Start up - 3 to 8
hours 6) Run off - 2 to 8 hours Total
time of 30 to 60 hours
easy is it to retrofit a drive?
not difficult. But is takes dedicated
planning and testing.
ever a drive retrofit fail?
There may always be some small bugs. But
they are not impossible to fix.
Onestop Inc. done Drive retrofit?
carried out more than 100 drive retrofits.
are the different types of drives that has
been used in the Retrofits?
Control Techniques, Yasakawa, Fuji,
Mitsubishi, Vacan, Yasakawa, Kollemorgen,
Vickers, Siemens, Baldor and many more..
What is the qualification of your
engineers in staff who have Mater's
degree in Electronics. Ven has specialized
in PWM control of drives. If you have drive
problem we can help you, guaranteed.
We can do the wiring. Can you help us
with the planning phase and identifying the
Absolutely. The planning and identifying
phase would take us about 8 to 12
Ven Swaminathan - 937 427 5847 -