MINI MILLS – MINI LATHES
Repair Service for Mini Lathes and Mini Mills – PLEASE SCROLL DOWN
CONTACT FORM
Send boards or control boxes to the address below:
Repair Service
196 North Clary Road
Jefferson , ME 04348
Contact me via email: Olduhfguy@gmail.com
Menu / Price List
Board repair pricing
Flat rate price plus return shipping billed with Paypal – I accept VENMO ZELLE GOOGLE PAY
PMDC
60
Repair of permanent magnet DC control boards (FC,XMT,KB) found in most entry level mills and lathes
BLDC
100
Repair of brushless ‘High Torque’ DC motor control boards (3540,3900,3950,4100,G0619,SX2,SX2.7,SX3 mills,SC2 lathes)
MISC
quoted individually
Special repair jobs by quote available !
Upgrades/Parts
Miscellaneous extra charges
Low Speed Torque/Cooling
20
Optional low speed cooling/torque upgrade for the FC250BJ/110V boards if performed during repair. If done seperately price is $60
1282
14.95
Replacement Speed control potentiometer – FC250/350 series boards
Fuse holder
1.75
Replacement 5x20mm fuseholder for mini lathes/mini mills
Rocker Power switch (Illuminated)
3.95
Replacement rocker switch for many mini lathes
TROUBLESHOOTING SECTION – SEE GALLERY FOR MANY OTHER VERSION
Explore key figures that reveal important trends and notable achievements across our services.
FC250BJ-FC350BJ Series Boards (Recent Production)
Place jumper between 6-7 then check for 120V AC between 4-5, If none then test fuse, power switch and speed potentiometer. Switch contacts on speed potentiometer should read a short when control is rotated full ccw. If 120v is present between 4-5 check for 12V DC between P1-P3, If no 12v is found then board needs repair.
XMT1125/1135/1160 Series Boards
Check for 120V AC at L1 nd L2. If none then check power switch and fuse. Install a jumper from K3-K4. Watch LED2(Power on) and LED3(Overload) indicators on the board LED3 will briefly flash and yellow LED will illuminate if overload detected. If yellow front panel LED is out when switch is in F or R, check for approx 6V DC between P1-P3. If none board needs repair.
Brushless “High Torque” Machines SX2, SX2.7, SX3
Be sure green LED is illuminated on power board. If not check fuse and power switch. If motor jerks violently, or requires manual rotation to start then power board needs repair. To test motor hall sensors, check for 5v/0 toggle on SA SB SC reference to common on same terminal strip. CAUTION 350+ volts present on these boards even 10 minutes after power is removed !
DC MOTOR TESTS
Obtain a 9 volt battery and touch the motor leads to the battery terminals. Motor should spin slowly and smoothly. If no rotation or speed is erratic then motor needs repair.
OTHER BOARD TYPES
Older Sieg DC motor control boards usually have 4 terminals, 2 for AC in and 2 for Motor out, as well as a 3 terminal connection for the speed potentiometer. There should be 12V DC across first and third potentiometer wires(P1-P3). Mid production boards have 7 terminals per newer boards , but 6-7 are hardwired to the direction switch.
VEVOR ALI EXPRESS EBAY LATHES
Many of these machines come equipped with poorly designed boards that will burn up on even moderate loads. They are are a waste of $ to fix, but 2 different replacements available starting at $95 – contact me for more information. If your Board has 5 large devices mounted to a heatsink, they are OK and I will repair them.
GALLERY
