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For the amount of torque I am needing to hold the "off the shelf" pneumatic version of the holding clamp would probably work although I would need to machine a sleeve to interface between the bore of the clamp and my .500" diameter shaft ( not that big of a deal, we utilize sleeves like that all...

It looks like both the pneumatic collet closer or clutch would work for what I am trying to do. Thank you so much for the input, this has been a tremendous help and if there are any other ideas out there I would love to hear them!

Did you "enable 3d content" at top ( I have noticed that if that is not clicked it will come up blank but with content enabled should come through, I have attached a 2D PDF with this response. The electric clutch idea definitely looks like a viable...

Attached is a 3D PDF of the concept (minus whatever will be used to secure gearhead output shaft). The motor will be mounted to the gearhead and then that entire assembly will be secured on to the mounting plate (light gray is gearhead and dark gray is motor). On the side of the mounting plate...

Hi Group, I am in the beginning stages of designing an automatic backlash checker for small gearboxes (Nema 17 and Nema 23, possibly as large as 34) and wanted to bounce my ideas off this group. the basic idea is to have a stepper motor w/ encoder mounted to the input of the gearhead, "lock"...

I am finishing up a "seek home (SH)" command with a Productivity1000 PLC and STP-DRV-4850 stepper drive and have my N.O. prox sensors individually wired to the inputs (complete separate circuits that fire their inputs individually). For some reason the "EN (home sensor)" goes low by itself when...

Oops, 12 bit IO module...

Over the weekend I did some more studying and it has dawned on me that I will need to create a new rung to be able to scale the output signal to the motor for total sped control. The line that I initially thought was for output scaling is actually for rate of velocity increase (line 9 of rung 2...

I apologize for not being clear concerning how I am changing motor directions with the GS1 VFD. I am using setting 1 of parameter 3-01 which is DI1 = run/stop (O2 in my logic) and DI2 = FWD/REV (O1 in the logic), the IO module being used is a 4 analog in/4 out and one of the outputs is being...

Thank you! As I was writing that diatribe yesterday it felt like I may have been thrashing in the deep end of the pool (I don't know what I don't know, thank you for setting me straight) . I will check the analog output signal as you had recommended to start and see what I am getting for...

A little more background info: the VFD is an Automation Direct GS1. I have double checked the settings on the VFD to confirm the the switch is set to V, the analog gain is 200% (to account for the -100% analog input offset), negative input offset polarity and that FWD and REV motion are enabled...

So I was able to narrow down the cause of the "uni-directional VFD". I changed my "source of frequency command" from 0-10V input to the potentiometer on the VFD and it is now toggling forward and reverse as expected. That makes some sense because I do not have everything completely squared away...

So it turns out that FWD-VFD was not doing what I wanted it to do. For some reason it did not like being in the "timing" rung so I put it into it's own rung and I am now sending the signal as intended (high on 1 half and low on the other) but for some reason the VFD is not responding as it...

Thank you so much for enlightening me! I will go through this exercise and see where it leads me and will post an update ASAP!

So this is the state of the logic before F1 is pressed. What I do not understand is the R130 on line 13 is already at 1 and this is before the program has even started. Based on that what it seems to me to be happening is the R130 is "registering" 1 twice so there is no differentiation to make...

I also wanted to mention that yesterday I removed the counter and FWD VFD coil on rung 4, line 15 and the corresponding N.O. FWD VFD contact on rung 7, line 3 and did see a output signal according to the indicator lights so I am assuming my code is funky somewhere...

Thank you for the insight! Please forgive my ignorance in advance but when you say to use a spare output as a probe ( I do have 1 available) what are you referring to (and would this be to the NO contacts on rung 7)?

I do have a monitor mode which shows if registers are energized or not but only at start up, there is not a way to monitor the logic or individual registers in real time (at least according to tech support). Here is a little back story concerning this program, we have an E-Stop test bench that I...

Apparently my eyes are not as good as I thought! Upon closer inspection the indicator light for O1 is NOT going high which explains why I am only going 1 direction so the issue must be with the logic...

The PLC is an EZ420 made by EZ Automation, now obsolete but this is what I have to work with. Based on the indicator lights it looks like O1 is going high with every pass regardless of count state. This is the only O1 in the program. If you would like I have a PDF of the entire logic ( 6 rungs)...