CNC control and drive · Wisconsin
CNC control and drive repair in Wisconsin
Fanuc, Siemens, Heidenhain, Mazatrol, Okuma OSP, Haas and Mitsubishi controls brought back from alarms, dead screens, lost parameters and drive faults, by techs who read the diagnostics instead of swapping boards.
What we fix
- Dead or flickering screens
- Servo and spindle drive alarms
- Lost parameters and memory
- Battery and backup problems
- I/O and communication faults
Techs from the Milwaukee, Madison and Green Bay regions.
Quick answerLocalSpindle of Wisconsin repairs CNC controls and drives on site across the state. We work on Fanuc, Siemens Sinumerik, Heidenhain, Mitsubishi, Mazatrol, Okuma OSP, Haas, Hurco and Fagor controls: alarms, dead screens, lost parameters, servo and spindle drive faults, I/O and communication problems, and parameter backups so a failure doesn’t cost you your machine setup.
From our techs
Read the alarm, then find the cause
A control alarm is a symptom with a number on it. A servo overcurrent alarm can mean a bad drive, but it can just as easily mean a shorted motor cable, coolant in a connector, or a mechanical bind making the motor work too hard. Replacing the drive without checking the rest is how a shop ends up buying two drives.
We use the control’s own diagnostics, the drive’s status LEDs and history, and meters on the power and the motor before we call anything bad. When a board or drive really has failed, we tell you whether it can be repaired, exchanged or replaced, with prices for each.
Backups are the cheapest repair there is
The parameters, pitch error compensation, ladder and offsets in a CNC are what make that machine yours. A dead battery or a failed memory board can wipe them, and rebuilding them from scratch takes days. We back up every control we work on when we can, and we’ll show you how to keep a current copy on a USB stick or card.
If your control has a low battery warning right now, call before it goes dark. On many controls, changing the battery with the power off loses the absolute positions.
Old controls in Wisconsin shops
A lot of the state’s shops run machines with controls from the 1990s and 2000s: Fanuc 0, 16, 18 and 21 series, early Sinumerik 810 and 840, older Mazatrol and Okuma OSP. They’re still good controls. We keep them running, source tested parts when new ones are gone, and when a control really is beyond saving, we can talk through a retrofit or replacing the machine.
Symptoms
What you're seeing, and what it usually means
The alarm names the axis or the unit. These are the causes we find behind it most often.
| What you’re seeing | What it usually means |
|---|---|
| Screen is dark, flickers or freezes | Power supply, backlight or LCD failure, a loose video cable, or a failing main board. |
| Servo alarm on one axis | Motor, cable, connector, drive or a mechanical bind. Measured before anything is swapped. |
| Spindle drive faults on acceleration | Spindle motor, drive, a bad belt or encoder, or incoming power that sags under load. |
| Machine lost its parameters | Dead backup battery or memory failure. Restored from a backup, or rebuilt if there isn’t one. |
| Control boots but won’t go ready | Emergency stop chain, door switches, a tripped overload, or an I/O fault. |
| Cabinet runs hot or alarms in summer | Clogged filters, a dead fan or a failed cabinet cooler. Heat shortens the life of every board in there. |
How we work it
CNC control and drive: our approach
Back it up
Parameters and programs saved before we work.
Diagnose
Control and drive history, LEDs, meters.
Repair or exchange
Options with prices for any failed board or drive.
Restore and test
Machine homed, axes and spindle proven.
A full visit
What a visit can cover
- Control power supplies and batteries
- Servo and spindle drives, cables and connectors
- Parameters, ladder and offset backups
- I/O modules and the emergency stop chain
- Cabinet cooling, filters and fans
- Encoders, scales and feedback cables
- Incoming power quality
- Network and DNC communication
On the van
- Meters and a scope for drives and feedback
- Backup batteries for common controls
- USB and card readers for parameter backups
- Common fuses, relays and fans
- Cable and connector repair kit
Example service call
Fanuc-controlled mill goes dark after a storm
The call
A shop near Appleton came in after an overnight thunderstorm to a vertical mill whose control screen stayed black. The rest of the shop had power.
What we did
- Phone. We asked whether the cabinet fans were running and whether any lights were on in the drive. Fans ran, drive lights were off.
- On site. A fuse in the control’s power input had blown, and the surge had also taken out the cabinet’s 24 volt supply.
- Fix. Replaced the fuse and the 24 volt supply from van stock, checked every voltage at the control, then booted it and checked parameters.
- Check. Parameters intact. Homed the machine, ran each axis and the spindle, and saved a fresh backup for the shop.
The result. Running the same day. We recommended a surge protector on the machine's feed.
A typical call, written to show how we work. It isn’t a specific customer.
Talk to a Wisconsin tech
Same problem on your floor?
Call and a tech will tell you what we’d check first, then the closest team heads your way.
- You talk to a tech, not a call center
- The closest Wisconsin team takes the job
- Straight answer on repair, rebuild or replace
Brands
CNC controls and drives we work on
Linked brands have their own page. See every brand we service.
- Fanuc
- Siemens Sinumerik
- Haas
- Mazatrol
- Okuma OSP
- Hurco WinMax
- Mitsubishi Meldas
- Heidenhain
- Fagor
- Centroid
- Acu-Rite
- Anilam
From the field
CNC control and drive: tips from our techs
Keep a current backup
Parameters, ladder and offsets on a USB stick or card, labeled with the date. Update it after any change.
Change batteries with the power on
On most controls that keeps the absolute positions. Ask us if you’re not sure about yours.
Clean cabinet filters before summer
Heat is the quiet killer of drives and boards. Clean filters and working fans pay for themselves.
Fanuc, Siemens Sinumerik, Heidenhain, Mitsubishi, Mazatrol, Okuma OSP, Haas, Hurco WinMax, Fagor, Fadal and others, old and new.
Yes, and we’ll show you how to keep your own backup current.
We diagnose them on the machine. Failed units get repaired, exchanged or replaced, and you choose with prices in front of you.
With a backup, usually the same visit. Without one, we rebuild them from the builder’s data and the machine itself, which takes longer.
Yes. We keep many older controls running and source tested parts when new ones are gone.
We can talk through whether a retrofit or a replacement machine makes more sense for your shop.
Who comes out
Wisconsin teams for cnc control and drive
The founding team closest to your shop takes the call. Central and western Wisconsin calls go to whichever team is nearest.
Milwaukee
Southeast Wisconsin. Cnc control and drive calls in Milwaukee, Waukesha, New Berlin, Menomonee Falls, Germantown, West Allis and nearby towns.
Madison
South central Wisconsin. Cnc control and drive calls in Madison, Sun Prairie, Middleton, Janesville, Beloit, Watertown and nearby towns.
Green Bay
Northeast Wisconsin and the Fox Valley. Cnc control and drive calls in Green Bay, De Pere, Appleton, Neenah and Menasha, Oshkosh, Fond du Lac and nearby towns.
Keep reading
Related repair
Machine down?
Get your CNC control and drive sorted
Call and talk to a tech about the machine, the control and the symptom. The Wisconsin team closest to you takes it from there.
