Pneumatic valve for cartesian robot

AI Thread Summary
Jake Platt is developing a high-speed X/Y Cartesian robot designed to vacuum defective parts from a moving conveyor, utilizing a venturi vacuum. He seeks to eliminate the need for a Z-axis by toggling the vacuum on and off with a suitable pneumatic valve, but is struggling to find a valve that accommodates larger hose diameters, specifically those comparable to ping-pong balls. A suggestion was made to consider creating small holes upstream in the hose to disrupt the vacuum instead of using a valve. This alternative approach could simplify the design while maintaining the vacuum's effectiveness. The discussion highlights the challenge of sourcing appropriate pneumatic components for specialized applications in robotics.
Jake Platt
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Hello,

I am trying to build a high-speed X/Y cartesian robot which vacuums up defected parts from a moving conveyor. The end effector of the robot has a venturi vacuum integrated. Because the vacuum is constant, I need a Z-axis to go up/down for the end effector to get the defects otherwise it sucks up everthing. This is very slow. I would rather keep the height constant of the end effector and instead toggle the vacuum on/off using a valve of some kind so I can eliminate the z axis. I can't seem to find what I'm looking for because valves I've found are for small diameters (10mm). I need a valve for hoses about the size of ping-pong balls. Can anyone suggest a source for a pneumatic valve in the size range and that can cycle in very high speeds?

Thank you,
Jake Platt
 
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Jake Platt said:
Hello,

I am trying to build a high-speed X/Y cartesian robot which vacuums up defected parts from a moving conveyor. The end effector of the robot has a venturi vacuum integrated. Because the vacuum is constant, I need a Z-axis to go up/down for the end effector to get the defects otherwise it sucks up everthing. This is very slow. I would rather keep the height constant of the end effector and instead toggle the vacuum on/off using a valve of some kind so I can eliminate the z axis. I can't seem to find what I'm looking for because valves I've found are for small diameters (10mm). I need a valve for hoses about the size of ping-pong balls. Can anyone suggest a source for a pneumatic valve in the size range and that can cycle in very high speeds?

Thank you,
Jake Platt

Interesting. Can you instead just open several small holes in the hose some distance upstream to spoil the vacuum at the end?
 
I misunderstood your point for 2 months. I was re-reading old posts and now i finally get your point. Clever! It never dawned on me to the leave the vacuum intact and just cancel the pressure.
 

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