My S5Pro controller that displays your bit speed does not match the speeds I program in to my tool paths. It registers 1500 rpm’s lower than my programmed speed. So for the last year I was told to increase my desired speed by 1500 rpm’s. If I wanted 18000 rpm’s I would program 19,500. On my last cut I programmed 20,000 rpm’s and the controller pegged my spindle to 24,000 rpm’s. This has never happened before. I reset the speed to 19000 and the controller read was around 17,500. I will be the first to admit I am not knowledgeable about the dial and buttons on the controller if they could help align the programmed speed with the actual output speed. Is this issue going to be addressed with any future update?
Then fill in the blanks by reading the LED display on the VFD.
Now when I want an actual speed of 10000, I look at the actual speed
in this table and then enter the corresponding RPM setting.
There are a bunch of posts here on the forum that the C3D spindles rotate slower than the advertised speed on the display. I dont remember them all but there were not 1500 RPM different. In the example from @RonDells the displayed speed is about 97% of the actual speed. A 3% difference will not make a difference. If you are concerned about exact RPM they sell little RPM gauges on Amazon. You place a little silver dot and read the rpm directly. I have put those on wood lathes to verify speed and they work well.
I am not recommending this one in particular but they are available and relatively inexpensive. Those silver strips are cut and placed on the rotating shaft and the meter reads the RPM without touching the spindle.
Thanks Ron I appreciate your note and recommendations to help set up a table. My confusion on this operating error is that this should be addressed by Carbide. The spindle and controller are there brand along with the machine. As an end user is this inaccuracy our issue to contend with every tool and tool path?
Sorry to vent to you but I’m thinking if this is the norm there needs to be an engineered solution.
Guy thanks for getting in the post. The 1500. Rpm’s is accurate difference from desired speed to output. I can increase the speed in my tool paths and tool databases to compensate for a known variable but don’t understand why this is the end user problem. I still think Carbide needs to address this issue. Like you said if it was a minor variation then I wouldn’t worry about it. The fact that it increased the speed from my programmed speed of 20,000 to an output speed of 24,000 is the first time the speed increased instead of decreasing. I’m just curious what other end users are contending with and there solutions. Thank you for the speed measuring device I will look into that too.
Thanks again