Variable frequency drive for high speed spindle

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Discussion Overview

The discussion revolves around the compatibility of a variable frequency drive (VFD) with a new high-speed spindle for a CNC router table. Participants explore technical specifications, potential upgrades, and the implications of motor ratings.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires whether the existing VFD (LS Industrial Systems - Starvert SV008IC5-1F) can support a new spindle rated at 1kW and 300Hz.
  • Another participant notes that the "008" in the VFD model indicates a 0.75 kW capacity, suggesting that an upgrade may be necessary for higher speeds.
  • There is confusion regarding whether the 0.75 kW rating refers to the motor within the VFD or its output capability, with one participant seeking clarification on the function of a frequency drive.
  • A later reply confirms that the VFD's rating pertains to the motor being driven, indicating that the current VFD may be insufficient for a 1 kW spindle and suggests considering a larger model (SV015IC5-1F).

Areas of Agreement / Disagreement

Participants express uncertainty about the implications of the motor ratings and the compatibility of the VFD with the new spindle. There is no consensus on whether the existing VFD is adequate for the new spindle specifications.

Contextual Notes

The discussion highlights potential limitations in understanding the specifications of VFDs and their relationship to spindle motors, as well as the need for further clarification on the output capabilities of the current drive.

Who May Find This Useful

Individuals interested in CNC machinery, variable frequency drives, and those considering upgrades to high-speed spindles may find this discussion relevant.

Icestation2
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I operate a CNC router table with a high speed spindle. I'm looking to upgrade to a new spindle but need to know if the variable frequency drive I currently have will work with this new spindle.

The new spindle has the following stats: 300Hz, 1kw, 18000RPM.

The frequency drive is made by LS Industrial Systems - Starvert SV008IC5-1F

The info on their website suggests that this particular drive can reach 400HZ, but I’m not sure about the other details, especially whether or not 1kw is too high.

More info is available using this link:

http://eng.lsis.biz/product/product/introduce/ecatalog_viewStream.asp?catalog_id=288&fileNum=1

Any advice would be welcome.
 
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Cool to see another CNC person here, I've did my own X2 CNC Mill conversion recently.

The "008" of "SV008IC5-1F" says it's 0.75 kw time to upgrade to get those faster IPM speeds.

btw have you tried CNCzone.com before, people there are good at answering CNC stuffs like this.
 
I'm wondering if the 0.75KW motor rating - as shown in the PDF manual - relates to the motor within the frequency drive, and not it's output. Does anyone know if a frequency drive has a motor? My knowledge of these devices is quite poor.
 
Icestation2 said:
I'm wondering if the 0.75KW motor rating - as shown in the PDF manual - relates to the motor within the frequency drive, and not it's output. Does anyone know if a frequency drive has a motor? My knowledge of these devices is quite poor.
The specs indicate the rating for the motor being driven. Looks like the model you are considering (SV008IC5-1F) would drive a 1 HP (0.75kW) load. If your spindle motor is rated at 1kW then I would consider something a little larger; maybe the SV015IC5-1F.
 

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