Boss 5 spindle switch problem

[DaveinUK]

My boss 5 spindle switch has a problem, it only works one way ( to the right )
I have had this problem before, but it seems to correct itself if I leave the machine for a while. Any ideas on tracking the source of the problem.

Thank's
Dave.

[HillBilly]

I would go straight to the switch contacts. Refer to diagram.

The top contact is active in either the FWD or REV locked position. The lower two contacts are the momentary start positions for FWD and REV. There is a possibility of the interlocking contact and contactor, but I would put my money on the switch.

Darek

[DaveinUK]

Thank's Darek.

Dave

[creep_pea]

Dave mine does the same starts fine in Hi forward but sometimes won't start in reverse or low forward, once it's started it will carry on starting just fine all day but it's getting it to start that first time.

I also had trouble stopping it when it did start, I found in the back of the cabinet the spindle contacts were covered in some sticky goo so I gave them a quick spray with some contact cleaner, this stopped it sticking on all together and helped with starting it but it's still not right.

Hope this might help.

Chris

[cworkmon]

Has anyone replaced the old sylvania switches with a new or current brand? I have the same contact block problem,on the "Hi/Lo Fwd/Rev/Start" switch and searching, I can find no reference to Sylvania ever admitting to making the switches. I will make something do, to replace it, but thought I'd ask... thanks for posting the Schematic.

[HillBilly]

The only way I see to do it with standard operators (Panel controls.) is to put a SPST NC MOMENTARY switch in front of a DPDT MOMENTARY OFF MOMENTARY switch.

Darek

[TPMX]

I was reading this post and appears to be related to what I am trying to get straightened out on my Series II.
When i got the machine the spindle would run as long as the power was on no matter what.
I found a relay that was jumped out that allowed this.
I have since changed the wiring back on the afected relay to what the manual shows but now my spindle will run forward or reverse but just by flipping the switch to either one.
what I understand from this post is that when you select forward or reverse the spindle shouldn,t start untill you momentarily hold the switch to start then release it,is this correct?
I have never ran one of these so am unsure how they did operate.
I am still tracking down the problem of my steppers only going as far as locking after the overide reset.They will only lock in position but fail to respond to an axis jog.
It appears to me that the control looks at whether the spindle is running or not through the SCA and LS1 board.
My wiring is a real mess in the e-stop/spindle start switch area and wonder if this is all related to the axis problem.

[HillBilly]

You are correct with the spindle switch operation.

When the spindle is running, relay CR2 is energized. This turns on the way oiler and also sends a signal to connector K5 of the XDI (or ZDI) board.

This interlock will only prevent a feed move from taking place. It should not affect jogging.

Darek

[TarHeelTom]

Has anyone replaced the old sylvania switches with a new or current brand? I have the same contact block problem,on the "Hi/Lo Fwd/Rev/Start" switch and searching, I can find no reference to Sylvania ever admitting to making the switches. I will make something do, to replace it, but thought I'd ask... thanks for posting the Schematic.

Local electrical surplus shop gave me a few old Allen-Bradley switches which have a very similar configuration to the Sylvania switches. The switch configuration on the back is a bit different, you can't directly replace the rear switch units on the Sylvania with the Allen-Bradley. BUT, it appear that you might be able to remove the switch assembly on the rear of the Allen Bradley and install it directly on the Sylvania front portion.

FWIW, the Allen-Bradley switches all have a 800M series part numbers.

Could it be that when Allen-Bradley bought out the switch design from Sylvania?

Tom