554,132 active members*
3,824 visitors online*
Register for free
Login
IndustryArena Forum > CNC Electronics > Spindles / VFD > Spindle Speed Variation
Results 1 to 5 of 5
  1. #1
    Registered
    Join Date
    Oct 2016
    Posts
    66

    Spindle Speed Variation

    speed shown on VFD display does not match that set on UCCNC.


    • UCCNC set to 6,000 RPM - VFD Display fluctuates constantly from 10,300 up to 10,900 then down. ( Analog voltage on board 2.62V)
    • UCCNC set to 12,000 RPM - VFD Display fluctuates constantly from 14,200 up to 15,200 then down. ( Analog voltage on board 4.87V)
    • UCCNC set to 24,000 RPM - VFD Display without fluctuation 22,812 ( Analog voltage on board 9.33V)


    The 10V supply from the VDF reads out 9.97V at the controller board (UB1), so did a little experiment and provided 10.2V by independent PS. This didn't really helped.

    • UCCNC set to 24,000 RPM - VFD Display without fluctuation 23,028 ( Analog voltage on board 9.46V)


    The VFD I have is
    HY02D223B coupled to a 400Hz spindle 220v - 2.2W water cooled.

    PD settings on the VFD:
    Jumper set on connection 1 & 2 for remote terminal control
    PD001 1
    PD002 1
    PD003 400
    PD004 400
    PD005 400
    PD007 20
    PD008 220
    PD009 15
    PD010 11
    PD011 100
    PD014 10
    PD015 10
    PD041 8
    PD052 1
    PD070 0
    PD072 400
    PD073 100
    PD120 100
    PD141 220
    PD142 9
    PD143 2
    PD144 3000

    What could be causing this variation in speeds?

    Thanks in advance!

  2. #2
    Registered
    Join Date
    Nov 2012
    Posts
    1218

    Re: Spindle Speed Variation

    What is your PD 071 (Analog Filtering) set to? Try increasing it.

  3. #3
    Registered
    Join Date
    Oct 2016
    Posts
    66

    Re: Spindle Speed Variation

    Quote Originally Posted by CitizenOfDreams View Post
    What is your PD 071 (Analog Filtering) set to? Try increasing it.
    PD 071=20
    Tried 30,35,40,50 and no real change, issue remains.

    I also tried having a dedicated shielded cable for the 10v, 0v, and analog signal from controller board to vfd but issue remains. Thought it was a noise issue because of how the speed increases then decreases then increases and so on.

    I checked the settings on UCCNC for the PWM frequency and was set to 400 hz while the manual for the bob (ub1) recommeneded 1524 hz so I used this value. This change helped getting ride of the variable speeds. When set to 12,000 on uccnc, vfd now reads 15144 then goes up to 15 162rmp for a second then down to 15 144. This small variation is acceptable but how can i tweak the settings to get 12 000 rpm at the vfd when that value is set on uccnc?

  4. #4
    Member
    Join Date
    Jan 2005
    Posts
    14298

    Re: Spindle Speed Variation

    Quote Originally Posted by Phil_Par View Post
    PD 071=20
    Tried 30,35,40,50 and no real change, issue remains.

    I also tried having a dedicated shielded cable for the 10v, 0v, and analog signal from controller board to vfd but issue remains. Thought it was a noise issue because of how the speed increases then decreases then increases and so on.

    I checked the settings on UCCNC for the PWM frequency and was set to 400 hz while the manual for the bob (ub1) recommeneded 1524 hz so I used this value. This change helped getting ride of the variable speeds. When set to 12,000 on uccnc, vfd now reads 15144 then goes up to 15 162rmp for a second then down to 15 144. This small variation is acceptable but how can i tweak the settings to get 12 000 rpm at the vfd when that value is set on uccnc?
    How many Amps is your 240v supply to the VFD Drive
    Mactec54

  5. #5
    Member
    Join Date
    Jan 2005
    Posts
    14298

    Re: Spindle Speed Variation

    Quote Originally Posted by Phil_Par View Post
    PD 071=20
    Tried 30,35,40,50 and no real change, issue remains.

    I also tried having a dedicated shielded cable for the 10v, 0v, and analog signal from controller board to vfd but issue remains. Thought it was a noise issue because of how the speed increases then decreases then increases and so on.

    I checked the settings on UCCNC for the PWM frequency and was set to 400 hz while the manual for the bob (ub1) recommeneded 1524 hz so I used this value. This change helped getting ride of the variable speeds. When set to 12,000 on uccnc, vfd now reads 15144 then goes up to 15 162rmp for a second then down to 15 144. This small variation is acceptable but how can i tweak the settings to get 12 000 rpm at the vfd when that value is set on uccnc?
    You first have to correct the 0-10v Analog output at the Board level before you do anything with the VFD Drive, 1524hz does not sound correct for the PWM to Analog 0-10v normally 100Hz is what is used
    Mactec54

Similar Threads

  1. Spindle variation on cnv
    By tshawkins in forum Milling
    Replies: 1
    Last Post: 10-15-2019, 04:36 AM
  2. Spindle Speed Variation Control
    By gunda in forum Okuma
    Replies: 11
    Last Post: 01-31-2012, 10:38 PM
  3. macro for spindle speed variation
    By lovetofish89 in forum Fanuc
    Replies: 4
    Last Post: 04-09-2010, 09:59 PM
  4. TL-1 SSV (spindle speed variation)
    By xyzcnc in forum Haas Lathes
    Replies: 5
    Last Post: 07-25-2007, 05:48 AM
  5. How to modify HPLG file to compensate for the speed variation of my laser engraver ?
    By g1zmo in forum General Laser Engraving / Cutting Machine Discussion
    Replies: 0
    Last Post: 05-10-2007, 04:16 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •