Hi,
A long time lurker (~6 years) and first time poster here on Denford forum.
I have been using Novamill (built in 2002 I think) for some 6 years now. Initially I was using it with the software that came with it but sometime in 2019 I converted it to Mach3 parallel controller board. That was basically a game changer. Unfortunately just two weeks ago the old computer that used to interface the mill died, I was forced to upgrade the parallel controller board to Mach3 USB. The new board I got is Chinese BitSensor. The initial set up was a breeze without any hiccup; all x,y,z motors configured w/ incremental steps properly calibrated, all limit switches correctly configured with ref homing working like a magic once again, and the spindle turns on and off just fine... except the spindle speed seems to be fixed to the max speed and I can't seem to change it by spindle command. I didn't have this problem with Mach3 parallel controller board.
I opened up EE box, measured a voltage between "4: COM" and "1: +10" on the Sprint 400 board and I am getting 0.6-0.9VDC. Shouldn't this reference be at 10V? Also the voltage between "AVM" and "AVI" on the Mach3 USB board as I cycle through various spindle speeds remains at around 1V and hardly ever changes.
As far as the connection between Sprint 400 and the Mach3 USB board goes, "+10", "MIN", "I/P" at Sprint 400 board are connected to "10v", "AVM", "AVI". And I am also driving SGR relay with Output3 on Mach3 USB board which is how I am controlling Spindle On/Off (this is working as expected). Hope this is enough information. Any ideas what is going on? Thanks in advance.
Correct voltage on 10V reference on Novamill Sprint 400 Spindle Board
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