Reverse spindle

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Manny
Posts: 18
Joined: Sun 13 Dec , 2020 14:16 pm
Hardware/Software: Starmill

Reverse spindle

Post by Manny » Wed 20 Jan , 2021 14:59 pm

Hi

Another silly question

The set up of the mach 3 was how I acquired it.
In the set up of the spindle m3 is CW and M4 is CCW
The spindle is in ports and pins is step pin 1 and step port as 1
Spindle set up is enabled with M3 as Output 1 and M4 as Output 2
here lays the issue I think

This is what I have established

Output 1 is port 1 Pin 14 is the spindle go relay
Output 2 is port 1 Pin 16 is the CIR Carousel In Relay
Output 3 is port 1 Pin 17 the Drawbar relay

I can not see anything that relates to the Signal Reverse Relay (SSR)

In the picture provided I think the relay on the left is the SSR based on the original drawings.
Without going down a rabbit hole between the two pictures should I have an SSR and whats the easiest way to id the pin the Relay occupies
As its been converted not all the wiring relates to the original drawings
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PXL_20201231_114629588.jpg
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DavidB
CNC Expert
CNC Expert
Posts: 173
Joined: Tue 19 Oct , 2010 16:06 pm
Hardware/Software: Triac, Orac

Re: Reverse spindle

Post by DavidB » Sat 23 Jan , 2021 2:44 am

Manny,

A common implementation would use pin 16 as the spindle reverse but due to the limited IO it seems to have been used for the tool changer. It might be the person that converted it wondered how useful spindle reverse is and left it out in favour of the tool changer. I use reverse spindle direction occasionally on my manual Bridgeport mill for things like milling cutters and slitting saws that fit on arbors where the direction can be chosen to suit the set-up, also the occasional left hand twist drill but otherwise all cutting in normal direction so reverse on your mill may be of minimal use. Personally I would wire it as a normal configuration if possible for the mill operation and move all IO for the tool changer and extras off to your 2nd LPT port just to keep things organised and not mix functionality across LPT ports, I don't think it's necessary but IMO just better organisation

Manny
Posts: 18
Joined: Sun 13 Dec , 2020 14:16 pm
Hardware/Software: Starmill

Re: Reverse spindle

Post by Manny » Sat 23 Jan , 2021 20:34 pm

Spot on Dave :) so i wired up port two pin 16 to another relay to switch on the reverse relay but also had to have a signal wire from breakout board to the spindle go relay the issue i then had was that the sgr was always on, solved this by putting a diode in series from the signal wire that fed between 79 and 80 :) and all works as it should, :) i just wished the person that sold it to me had told me that they had wired it as such.

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